CVE-2024-45003: vfs: Don't evict inode under the inode lru traversing context

Q: What is the severity of CVE-2024-45003?

CVE-2024-45003 is rated as a medium severity vulnerability.

Q: How do I fix CVE-2024-45003?

To fix CVE-2024-45003, upgrade your Linux kernel to the patched version 5.10.226-1, 6.1.123-1, or another recommended version listed in the advisory.

Q: What versions of Linux are affected by CVE-2024-45003?

CVE-2024-45003 affects various versions of the Linux kernel ranging from 4.13 up to several prior to 6.11-rc3.

Q: Is CVE-2024-45003 being actively exploited?

As of the latest information, there are no reports indicating that CVE-2024-45003 is actively being exploited in the wild.

Q: What systems should prioritize patching for CVE-2024-45003?

Systems running affected versions of the Linux kernel, particularly in production or critical environments, should prioritize patching for CVE-2024-45003.

Published Sep 4, 2024

Updated

In the Linux kernel, the following vulnerability has been resolved:

vfs: Don't evict inode under the inode lru traversing context

The inode reclaiming process(See function pruneicachesb) collects all reclaimable inodes and mark them with IFREEING flag at first, at that time, other processes will be stuck if they try getting these inodes (See function findinodefast), then the reclaiming process destroy the inodes by function disposelist(). Some filesystems(eg. ext4 with eainode feature, ubifs with xattr) may do inode lookup in the inode evicting callback function, if the inode lookup is operated under the inode lru traversing context, deadlock problems may happen.

Case 1: In function ext4evictinode(), the ea inode lookup could happen if eainode feature is enabled, the lookup process will be stuck under the evicting context like this:

1. File A has inode ireg and an ea inode iea 2. getfattr(A, xattrbuf) // iea is added into lru // lru->iea 3. Then, following three processes running like this:

PA PB echo 2 > /proc/sys/vm/dropcaches shrinkslab prunedcachesb // ireg is added into lru, lru->iea->ireg pruneicachesb listlruwalkone inodelruisolate iea->istate |= IFREEING // set inode state inodelruisolate iget(ireg) spinunlock(&ireg->ilock) spinunlock(lrulock) rm file A ireg->nlink = 0 iput(ireg) // ireg->nlink is 0, do evict ext4evictinode ext4xattrdeleteinode ext4xattrinodedecrefall ext4xattrinodeiget ext4iget(iea->iino) igetlocked findinodefast waitonfreeinginode(iea) ----→ AA deadlock disposelist // cannot be executed by pruneicachesb wakeupbit(&iea->istate)

Case 2: In deleted inode writing function ubifsjnlwriteinode(), file deleting process holds BASEHD's wbuf->iomutex while getting the xattr inode, which could race with inode reclaiming process(The reclaiming process could try locking BASEHD's wbuf->iomutex in inode evicting function), then an ABBA deadlock problem would happen as following:

1. File A has inode ia and a xattr(with inode ixa), regular file B has inode ib and a xattr. 2. getfattr(A, xattrbuf) // ixa is added into lru // lru->ixa 3. Then, following three processes running like this:

PA PB PC echo 2 > /proc/sys/vm/dropcaches shrinkslab prunedcachesb // ib and ia are added into lru, lru->ixa->ib->ia pruneicachesb listlruwalkone inodelruisolate ixa->istate |= IFREEING // set inode state inodelruisolate iget(ib) spinunlock(&ib->ilock) spinunlock(lrulock) rm file B ib->nlink = 0 rm file A iput(ia) ubifsevictinode(ia) ubifsjnldeleteinode(ia) ubifsjnlwriteinode(ia) makereservation(BASEHD) // Lock wbuf->iomutex ubifsiget(ixa->iino) igetlocked findinodefast waitonfreeinginode(ixa) | iput(ib) // ib->nlink is 0, do evict | ubifsevictinode | ubifsjnldeleteinode(ib) ↓ ubifsjnlwriteinode ABBA deadlock ←-----makereservation(BASEHD) disposelist // cannot be executed by pruneicachesb wakeupbit(&ixa->istate)

Fix the possible deadlock by using new inode state flag ILRUISOLATING to pin the inode in memory while inodelruisolate( ---truncated---

Affected Software

203 affected componentsFixes available

Linux Linux kernel>=4.13<5.4.283

Linux Linux kernel>=5.5<5.10.225

Linux Linux kernel>=5.11<5.15.166

Linux Linux kernel>=5.16<6.1.107

Linux Linux kernel>=6.2<6.6.48

Linux Linux kernel>=6.7<6.10.7

Linux Linux kernel=6.11-rc1

Linux Linux kernel=6.11-rc2

Linux Linux kernel=6.11-rc3

Microsoft cbl2 kernel 5.15.164.1-1

Patch available

Microsoft cbl2 kernel 5.15.164.1-1

Patch available

Microsoft azl3 kernel 6.6.47.1-1

Patch available

Microsoft azl3 kernel 6.6.51.1-5

Patch available

Microsoft cbl2 kernel 5.15.167.1-1

Patch available

debian/linux

6.1.176-16.1.190-16.12.107-16.12.113-17.2.12-17.2.13-1

ubuntu/linux-azure*

ubuntu/linux-aws-hwe*

ubuntu/linux-azure*

ubuntu/linux-gcp*

ubuntu/linux-hwe*

ubuntu/linux-hwe-edge*

ubuntu/linux-oracle*

ubuntu/linux*

ubuntu/linux-aws*

ubuntu/linux-aws-5.0*

ubuntu/linux-aws-5.3*

ubuntu/linux-aws-5.4<5.4.0-1135.145~18.04.1

5.4.0-1135.145~18.04.1

ubuntu/linux-azure*

ubuntu/linux-azure-4.15*

ubuntu/linux-azure-5.3*

ubuntu/linux-azure-5.4<5.4.0-1140.147~18.04.1

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ubuntu/linux-azure-edge*

ubuntu/linux-gcp*

ubuntu/linux-gcp-4.15*

ubuntu/linux-gcp-5.3*

ubuntu/linux-gcp-5.4<5.4.0-1139.148~18.04.1

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ubuntu/linux-gke-4.15*

ubuntu/linux-gke-5.4*

ubuntu/linux-gkeop-5.4*

ubuntu/linux-hwe*

ubuntu/linux-hwe-5.4<5.4.0-200.220~18.04.1

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ubuntu/linux-hwe-edge*

ubuntu/linux-ibm-5.4<5.4.0-1082.87~18.04.1

5.4.0-1082.87~18.04.1

ubuntu/linux-kvm*

ubuntu/linux-oem*

ubuntu/linux-oracle*

ubuntu/linux-oracle-5.0*

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ubuntu/linux-oracle-5.4<5.4.0-1134.143~18.04.1

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ubuntu/linux-raspi-5.4<5.4.0-1119.131~18.04.1

5.4.0-1119.131~18.04.1

ubuntu/linux-aws-fips*

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ubuntu/linux-fips*

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ubuntu/linux-fips*

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ubuntu/linux-azure<5.4.0-1140.147

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ubuntu/linux-bluefield<5.4.0-1095.102

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ubuntu/linux-gkeop<5.4.0-1102.106

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ubuntu/linux-gkeop-5.15<5.15.0-1055.62~20.04.1

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ubuntu/linux-hwe-5.15<5.15.0-125.135~20.04.1

5.15.0-125.135~20.04.1

ubuntu/linux-ibm<5.4.0-1082.87

5.4.0-1082.87

ubuntu/linux-ibm-5.15<5.15.0-1065.68~20.04.1

5.15.0-1065.68~20.04.1

ubuntu/linux-intel-iotg-5.15<5.15.0-1067.73~20.04.1

5.15.0-1067.73~20.04.1

ubuntu/linux-iot<5.4.0-1044.45

5.4.0-1044.45

ubuntu/linux-kvm<5.4.0-1123.131

5.4.0-1123.131

ubuntu/linux-lowlatency-hwe-5.15<5.15.0-125.135~20.04.1

5.15.0-125.135~20.04.1

ubuntu/linux-nvidia-tegra-5.15<5.15.0-1032.32~20.04.1

5.15.0-1032.32~20.04.1

ubuntu/linux-oracle<5.4.0-1134.143

5.4.0-1134.143

ubuntu/linux-oracle-5.15<5.15.0-1070.76~20.04.1

5.15.0-1070.76~20.04.1

ubuntu/linux-raspi<5.4.0-1119.131

5.4.0-1119.131

ubuntu/linux-riscv-5.15<5.15.0-1068.72~20.04.1

5.15.0-1068.72~20.04.1

ubuntu/linux-xilinx-zynqmp<5.4.0-1054.58

5.4.0-1054.58

ubuntu/linux-aws-5.11*

ubuntu/linux-aws-5.13*

ubuntu/linux-aws-5.8*

ubuntu/linux-azure-5.11*

ubuntu/linux-azure-5.13*

ubuntu/linux-azure-5.8*

ubuntu/linux-azure-fde*

ubuntu/linux-gcp-5.11*

ubuntu/linux-gcp-5.13*

ubuntu/linux-gcp-5.8*

ubuntu/linux-gke*

ubuntu/linux-gke-5.15*

ubuntu/linux-hwe-5.11*

ubuntu/linux-hwe-5.13*

ubuntu/linux-hwe-5.8*

ubuntu/linux-intel-5.13*

ubuntu/linux-oem-5.10*

ubuntu/linux-oem-5.13*

ubuntu/linux-oem-5.6*

ubuntu/linux-oracle-5.11*

ubuntu/linux-oracle-5.13*

ubuntu/linux-oracle-5.8*

ubuntu/linux-raspi2*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.11*

ubuntu/linux-riscv-5.8*

ubuntu/linux-aws-fips<5.4.0-1135.145+fips1

5.4.0-1135.145+fips1

ubuntu/linux-azure-fips<5.4.0-1140.147+fips1

5.4.0-1140.147+fips1

ubuntu/linux-fips<5.4.0-1109.119

5.4.0-1109.119

ubuntu/linux-gcp-fips<5.4.0-1139.148+fips1

5.4.0-1139.148+fips1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux<5.15.0-125.135

5.15.0-125.135

ubuntu/linux-allwinner-5.19*

ubuntu/linux-aws<5.15.0-1072.78

5.15.0-1072.78

ubuntu/linux-aws-5.19*

ubuntu/linux-aws-6.2*

ubuntu/linux-aws-6.5*

ubuntu/linux-aws-6.8<6.8.0-1020.22~22.04.1

6.8.0-1020.22~22.04.1

ubuntu/linux-azure<5.15.0-1075.84

5.15.0-1075.84

ubuntu/linux-azure-5.19*

ubuntu/linux-azure-6.2*

ubuntu/linux-azure-6.5*

ubuntu/linux-azure-6.8<6.8.0-1020.23~22.04.1

6.8.0-1020.23~22.04.1

ubuntu/linux-azure-fde<5.15.0-1076.85.1

5.15.0-1076.85.1

ubuntu/linux-azure-fde-5.19*

ubuntu/linux-azure-fde-6.2*

ubuntu/linux-gcp<5.15.0-1071.79

5.15.0-1071.79

ubuntu/linux-gcp-5.19*

ubuntu/linux-gcp-6.2*

ubuntu/linux-gcp-6.5*

ubuntu/linux-gcp-6.8<6.8.0-1019.21~22.04.1

6.8.0-1019.21~22.04.1

ubuntu/linux-gke<5.15.0-1069.75

5.15.0-1069.75

ubuntu/linux-gkeop<5.15.0-1055.62

5.15.0-1055.62

ubuntu/linux-hwe-5.19*

ubuntu/linux-hwe-6.2*

ubuntu/linux-hwe-6.5*

ubuntu/linux-hwe-6.8<6.8.0-50.51~22.04.1

6.8.0-50.51~22.04.1

ubuntu/linux-ibm<5.15.0-1065.68

5.15.0-1065.68

ubuntu/linux-ibm-6.8<6.8.0-1017.17~22.04.1

6.8.0-1017.17~22.04.1

ubuntu/linux-intel-iotg<5.15.0-1067.73

5.15.0-1067.73

ubuntu/linux-kvm<5.15.0-1069.74

5.15.0-1069.74

ubuntu/linux-lowlatency<5.15.0-125.135

5.15.0-125.135

ubuntu/linux-lowlatency-hwe-5.19*

ubuntu/linux-lowlatency-hwe-6.2*

ubuntu/linux-lowlatency-hwe-6.5*

ubuntu/linux-lowlatency-hwe-6.8<6.8.0-50.51.1~22.04.1

6.8.0-50.51.1~22.04.1

ubuntu/linux-nvidia<5.15.0-1067.68

5.15.0-1067.68

ubuntu/linux-nvidia-6.2*

ubuntu/linux-nvidia-6.5*

ubuntu/linux-nvidia-6.8<6.8.0-1019.21~22.04.1

6.8.0-1019.21~22.04.1

ubuntu/linux-nvidia-tegra<5.15.0-1032.32

5.15.0-1032.32

ubuntu/linux-nvidia-tegra-igx<5.15.0-1020.20

5.15.0-1020.20

ubuntu/linux-oem-5.17*

ubuntu/linux-oem-6.0*

ubuntu/linux-oem-6.1*

ubuntu/linux-oem-6.5*

ubuntu/linux-oracle<5.15.0-1070.76

5.15.0-1070.76

ubuntu/linux-oracle-6.5*

ubuntu/linux-oracle-6.8<6.8.0-1017.18~22.04.1

6.8.0-1017.18~22.04.1

ubuntu/linux-raspi<5.15.0-1065.68

5.15.0-1065.68

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.19*

ubuntu/linux-riscv-6.5*

ubuntu/linux-riscv-6.8<6.8.0-50.51.1~22.04.1

6.8.0-50.51.1~22.04.1

ubuntu/linux-starfive-5.19*

ubuntu/linux-starfive-6.2*

ubuntu/linux-starfive-6.5*

ubuntu/linux-xilinx-zynqmp<5.15.0-1038.42

5.15.0-1038.42

ubuntu/linux-bluefield<5.15.0-1056.58

5.15.0-1056.58

ubuntu/linux-intel-iot-realtime<5.15.0-1066.68

5.15.0-1066.68

ubuntu/linux-realtime<5.15.0-1073.81

5.15.0-1073.81

ubuntu/linux-realtime-6.8<6.8.1-1013.14~22.04.1

6.8.1-1013.14~22.04.1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-aws-fips<5.15.0-1072.78+fips1

5.15.0-1072.78+fips1

ubuntu/linux-azure-fips<5.15.0-1075.84+fips1

5.15.0-1075.84+fips1

ubuntu/linux-fips<5.15.0-125.135+fips1

5.15.0-125.135+fips1

ubuntu/linux-gcp-fips<5.15.0-1071.79+fips1

5.15.0-1071.79+fips1

ubuntu/linux<6.8.0-50.51

6.8.0-50.51

ubuntu/linux-aws<6.8.0-1020.22

6.8.0-1020.22

ubuntu/linux-azure<6.8.0-1020.23

6.8.0-1020.23

ubuntu/linux-gcp<6.8.0-1019.21

6.8.0-1019.21

ubuntu/linux-gke<6.8.0-1015.19

6.8.0-1015.19

ubuntu/linux-gkeop<6.8.0-1002.4

6.8.0-1002.4

ubuntu/linux-ibm<6.8.0-1017.17

6.8.0-1017.17

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6.8.0-50.51.1

ubuntu/linux-nvidia<6.8.0-1019.21

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ubuntu/linux-nvidia-lowlatency<6.8.0-1019.21.1

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ubuntu/linux-oem-6.8<6.8.0-1018.18

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ubuntu/linux-oracle<6.8.0-1017.18

6.8.0-1017.18

ubuntu/linux-raspi<6.8.0-1016.18

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6.8.0-50.51.1

ubuntu/linux-xilinx<6.8.0-1017.18

6.8.0-1017.18

ubuntu/linux-raspi-realtime<6.8.0-2015.16

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ubuntu/linux-realtime<6.8.1-1013.14

6.8.1-1013.14

ubuntu/linux-fips<6.8.0-78.78+fips1

6.8.0-78.78+fips1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade debian/linux to a version that resolves this vulnerability.
Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.113-1Fixed in 7.2.12-1Fixed in 7.2.13-1
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Fixed in 5.4.0-1135.145~18.04.1
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Fixed in 5.4.0-1140.147~18.04.1
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Fixed in 5.4.0-1139.148~18.04.1
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Fixed in 5.4.0-200.220~18.04.1
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Fixed in 5.4.0-1082.87~18.04.1
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Fixed in 5.4.0-1134.143~18.04.1
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Fixed in 5.4.0-1119.131~18.04.1
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Fixed in 5.4.0-200.220
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Fixed in 5.4.0-1135.145
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Fixed in 5.15.0-1072.78~20.04.1
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Fixed in 5.4.0-1140.147
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Fixed in 5.15.0-1078.87~20.04.1
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Fixed in 5.4.0-1095.102
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Fixed in 5.4.0-1139.148
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Fixed in 5.15.0-1071.79~20.04.1
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Fixed in 5.4.0-1102.106
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Fixed in 5.15.0-1055.62~20.04.1
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Fixed in 5.15.0-125.135~20.04.1
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Fixed in 5.4.0-1082.87
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Fixed in 5.15.0-1065.68~20.04.1
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Fixed in 5.15.0-1067.73~20.04.1
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Fixed in 5.4.0-1044.45
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Fixed in 5.4.0-1123.131
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Fixed in 5.15.0-125.135~20.04.1
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Fixed in 5.15.0-1032.32~20.04.1
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Fixed in 5.4.0-1134.143
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Fixed in 5.15.0-1070.76~20.04.1
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Fixed in 5.4.0-1119.131
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Fixed in 5.15.0-1068.72~20.04.1
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Fixed in 5.4.0-1054.58
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Fixed in 5.4.0-1135.145+fips1
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Fixed in 5.4.0-1140.147+fips1
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Fixed in 5.4.0-1109.119
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Fixed in 5.4.0-1139.148+fips1
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Fixed in 5.15.0-125.135
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Fixed in 5.15.0-1072.78
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Fixed in 6.8.0-1020.22~22.04.1
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Fixed in 5.15.0-1075.84
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Fixed in 6.8.0-1020.23~22.04.1
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Fixed in 5.15.0-1076.85.1
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Fixed in 5.15.0-1071.79
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Fixed in 6.8.0-1019.21~22.04.1
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Fixed in 5.15.0-1069.75
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Fixed in 5.15.0-1055.62
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Fixed in 6.8.0-50.51~22.04.1
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Fixed in 5.15.0-1065.68
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Fixed in 6.8.0-1017.17~22.04.1
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Fixed in 5.15.0-1067.73
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Fixed in 5.15.0-1069.74
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Fixed in 5.15.0-125.135
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Fixed in 6.8.0-50.51.1~22.04.1
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Fixed in 5.15.0-1067.68
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Fixed in 6.8.0-1019.21~22.04.1
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Fixed in 5.15.0-1032.32
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Fixed in 5.15.0-1020.20
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Fixed in 5.15.0-1070.76
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Fixed in 6.8.0-1017.18~22.04.1
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Fixed in 5.15.0-1065.68
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Fixed in 6.8.0-50.51.1~22.04.1
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Fixed in 5.15.0-1038.42
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Fixed in 5.15.0-1056.58
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Fixed in 5.15.0-1066.68
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Fixed in 5.15.0-1073.81
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Fixed in 6.8.1-1013.14~22.04.1
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Fixed in 5.15.0-1072.78+fips1
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Fixed in 5.15.0-1075.84+fips1
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Fixed in 5.15.0-125.135+fips1
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Fixed in 5.15.0-1071.79+fips1
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Fixed in 6.8.0-50.51
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Fixed in 6.8.0-1020.22
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Fixed in 6.8.0-1020.23
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Fixed in 6.8.0-1019.21
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Fixed in 6.8.0-1015.19
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Fixed in 6.8.0-1002.4
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Fixed in 6.8.0-1017.17
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Fixed in 6.8.0-50.51.1
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Fixed in 6.8.0-1019.21
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Fixed in 6.8.0-1019.21.1
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Fixed in 6.8.0-1018.18
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Fixed in 6.8.0-1017.18
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Fixed in 6.8.0-1016.18
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Fixed in 6.8.0-50.51.1
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Fixed in 6.8.0-1017.18
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Fixed in 6.8.0-2015.16
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Fixed in 6.8.1-1013.14
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Fixed in 6.8.0-78.78+fips1
Compensating control
Use the Linux kernel inode state flag I_LRU_ISOLATING to pin the inode in memory while inode_lru_isolate() runs, preventing inode eviction under the inode LRU traversal context.

Event History

Sep 4, 2024

CVE Published

via MITRE·07:54 PM

Data Sourced

via MITRE·07:54 PM

Description

Data Sourced

via OSV·08:15 PM

DescriptionSeverityAffected Software

Data Sourced

via NVD·08:15 PM

RemedyDescriptionSeverityWeaknessAffected Software

Oct 14, 2024

Data Sourced

via Microsoft·07:00 AM

DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

DSA-5782

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

What is the severity of CVE-2024-45003?

CVE-2024-45003 is rated as a medium severity vulnerability.

How do I fix CVE-2024-45003?

To fix CVE-2024-45003, upgrade your Linux kernel to the patched version 5.10.226-1, 6.1.123-1, or another recommended version listed in the advisory.

What versions of Linux are affected by CVE-2024-45003?

CVE-2024-45003 affects various versions of the Linux kernel ranging from 4.13 up to several prior to 6.11-rc3.

Is CVE-2024-45003 being actively exploited?

As of the latest information, there are no reports indicating that CVE-2024-45003 is actively being exploited in the wild.

What systems should prioritize patching for CVE-2024-45003?

Systems running affected versions of the Linux kernel, particularly in production or critical environments, should prioritize patching for CVE-2024-45003.

CVE-2024-45003: vfs: Don't evict inode under the inode lru traversing context

Affected Software

Remediation

Event History

Parent advisories

Peer vulnerabilities

Frequently Asked Questions

What is the severity of CVE-2024-45003?

How do I fix CVE-2024-45003?

What versions of Linux are affected by CVE-2024-45003?

Is CVE-2024-45003 being actively exploited?

What systems should prioritize patching for CVE-2024-45003?

Company

Resources

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