CVE-2024-50304: ipv4: ip_tunnel: Fix suspicious RCU usage warning in ip_tunnel_find()

Q: What is the severity of CVE-2024-50304?

CVE-2024-50304 has a moderate severity rating due to the potential impact on system stability.

Q: How do I fix CVE-2024-50304?

To address CVE-2024-50304, update your Linux kernel to a version higher than 6.11.7 or apply the patches from the kernel repositories.

Q: Which Linux kernel versions are affected by CVE-2024-50304?

CVE-2024-50304 affects Linux kernel versions from 3.10.12 up to 6.11.7, as well as versions 6.12-rc1 to 6.12-rc6.

Q: What types of systems are impacted by CVE-2024-50304?

Systems running the affected versions of the Linux kernel, particularly those utilizing IP tunnel features, are impacted by CVE-2024-50304.

Q: Is there a known exploit for CVE-2024-50304?

As of now, there is no publicly available exploit for CVE-2024-50304.

Published Nov 19, 2024

Updated

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

ipv4: iptunnel: Fix suspicious RCU usage warning in iptunnelfind()

The per-netns IP tunnel hash table is protected by the RTNL mutex and iptunnelfind() is only called from the control path where the mutex is taken.

Add a lockdep expression to hlistforeachentryrcu() in iptunnelfind() in order to validate that the mutex is held and to silence the suspicious RCU usage warning [1].

[1] WARNING: suspicious RCU usage 6.12.0-rc3-custom-gd95d9a31aceb #139 Not tainted ----------------------------- net/ipv4/iptunnel.c:221 RCU-list traversed in non-reader section!!

other info that might help us debug this:

rcuscheduleractive = 2, debuglocks = 1 1 lock held by ip/362: #0: ffffffff86fc7cb0 (rtnlmutex){+.+.}-{3:3}, at: rtnetlinkrcvmsg+0x377/0xf60

stack backtrace: CPU: 12 UID: 0 PID: 362 Comm: ip Not tainted 6.12.0-rc3-custom-gd95d9a31aceb #139 Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011 Call Trace: <TASK> dumpstacklvl+0xba/0x110 lockdeprcususpicious.cold+0x4f/0xd6 iptunnelfind+0x435/0x4d0 iptunnelnewlink+0x517/0x7a0 ipgrenewlink+0x14c/0x170 rtnlnewlink+0x1173/0x19c0 rtnlnewlink+0x6c/0xa0 rtnetlinkrcvmsg+0x3cc/0xf60 netlinkrcvskb+0x171/0x450 netlinkunicast+0x539/0x7f0 netlinksendmsg+0x8c1/0xd80 syssendmsg+0x8f9/0xc20 syssendmsg+0x197/0x1e0 syssendmsg+0x122/0x1f0 dosyscall64+0xbb/0x1d0 entrySYSCALL64afterhwframe+0x77/0x7f

Other sources

This CVE was automatically created from a reference found in an email or other text. If you are reading this, then this CVE entry is probably erroneous, since this text should be replaced by the official CVE description automatically.

— Launchpad

Affected Software

221 affected componentsFixes available

Linux Linux kernel>=3.10.12<6.11.7

Linux Linux kernel=6.12-rc1

Linux Linux kernel=6.12-rc2

Linux Linux kernel=6.12-rc3

Linux Linux kernel=6.12-rc4

Linux Linux kernel=6.12-rc5

Linux Linux kernel=6.12-rc6

Microsoft cbl2 kernel 5.15.182.1-1

Microsoft cbl2 kernel 5.15.182.1-1<5.15.179.1-1

5.15.179.1-1

Microsoft cbl2 kernel 5.15.179.1-1<5.15.179.1-1

5.15.179.1-1

Microsoft azl3 kernel 6.6.76.1-1<6.6.76.1-1

6.6.76.1-1

Microsoft azl3 kernel 6.6.92.2-1<6.6.76.1-1

6.6.76.1-1

debian/linux<6.1.128-1

6.1.128-1

debian/linux<6.11.7-1

6.11.7-1

debian/linux<6.11.7-1

6.11.7-1

debian/linux

6.1.176-16.1.190-16.12.107-16.12.116-17.2.15-17.3.3-1

ubuntu/linux*

ubuntu/linux-aws*

ubuntu/linux-azure*

ubuntu/linux-lts-xenial*

ubuntu/linux*

ubuntu/linux-aws*

ubuntu/linux-aws-hwe*

ubuntu/linux-azure*

ubuntu/linux-gcp*

ubuntu/linux-hwe*

ubuntu/linux-hwe-edge*

ubuntu/linux-kvm*

ubuntu/linux-oracle*

ubuntu/linux-fips*

ubuntu/linux*

ubuntu/linux-aws*

ubuntu/linux-aws-5.0*

ubuntu/linux-aws-5.3*

ubuntu/linux-aws-5.4<5.4.0-1158.168~18.04.1

5.4.0-1158.168~18.04.1

ubuntu/linux-azure*

ubuntu/linux-azure-4.15*

ubuntu/linux-azure-5.3*

ubuntu/linux-azure-5.4<5.4.0-1162.168~18.04.1

5.4.0-1162.168~18.04.1

ubuntu/linux-azure-edge*

ubuntu/linux-gcp*

ubuntu/linux-gcp-4.15*

ubuntu/linux-gcp-5.3*

ubuntu/linux-gcp-5.4<5.4.0-1161.170~18.04.1

5.4.0-1161.170~18.04.1

ubuntu/linux-gke-4.15*

ubuntu/linux-gke-5.4*

ubuntu/linux-gkeop-5.4*

ubuntu/linux-hwe*

ubuntu/linux-hwe-5.4<5.4.0-229.249~18.04.1

5.4.0-229.249~18.04.1

ubuntu/linux-hwe-edge*

ubuntu/linux-ibm-5.4<5.4.0-1104.109~18.04.1

5.4.0-1104.109~18.04.1

ubuntu/linux-kvm*

ubuntu/linux-oem*

ubuntu/linux-oracle*

ubuntu/linux-oracle-5.0*

ubuntu/linux-oracle-5.3*

ubuntu/linux-oracle-5.4<5.4.0-1156.166~18.04.2

5.4.0-1156.166~18.04.2

ubuntu/linux-raspi-5.4<5.4.0-1143.156~18.04.1

5.4.0-1143.156~18.04.1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-aws-5.15<5.15.0-1080.87~20.04.1

5.15.0-1080.87~20.04.1

ubuntu/linux-azure-5.15<5.15.0-1086.95~20.04.1

5.15.0-1086.95~20.04.1

ubuntu/linux-gcp-5.15<5.15.0-1081.90~20.04.1

5.15.0-1081.90~20.04.1

ubuntu/linux-hwe-5.15<5.15.0-136.147~20.04.1

5.15.0-136.147~20.04.1

ubuntu/linux-ibm-5.15<5.15.0-1074.77~20.04.1

5.15.0-1074.77~20.04.1

ubuntu/linux-intel-iotg-5.15<5.15.0-1077.83~20.04.1

5.15.0-1077.83~20.04.1

ubuntu/linux-lowlatency-hwe-5.15<5.15.0-135.146~20.04.1

5.15.0-135.146~20.04.1

ubuntu/linux-oracle-5.15<5.15.0-1077.83~20.04.1

5.15.0-1077.83~20.04.1

ubuntu/linux-riscv-5.15<5.15.0-1075.79~20.04.1

5.15.0-1075.79~20.04.1

ubuntu/linux<5.4.0-229.249

5.4.0-229.249

ubuntu/linux-aws<5.4.0-1158.168

5.4.0-1158.168

ubuntu/linux-aws-5.11*

ubuntu/linux-aws-5.13*

ubuntu/linux-aws-5.8*

ubuntu/linux-azure<5.4.0-1162.168

5.4.0-1162.168

ubuntu/linux-azure-5.11*

ubuntu/linux-azure-5.13*

ubuntu/linux-azure-5.8*

ubuntu/linux-azure-fde*

ubuntu/linux-bluefield<5.4.0-1117.124

5.4.0-1117.124

ubuntu/linux-gcp<5.4.0-1161.170

5.4.0-1161.170

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-gkeop*

ubuntu/linux-gkeop-5.15*

ubuntu/linux-hwe-5.11*

ubuntu/linux-hwe-5.13*

ubuntu/linux-hwe-5.8*

ubuntu/linux-ibm<5.4.0-1104.109

5.4.0-1104.109

ubuntu/linux-intel-5.13*

ubuntu/linux-iot<5.4.0-1062.65

5.4.0-1062.65

ubuntu/linux-kvm<5.4.0-1145.154

5.4.0-1145.154

ubuntu/linux-nvidia-tegra-5.15<5.15.0-1039.39~20.04.1

5.15.0-1039.39~20.04.1

ubuntu/linux-oem-5.10*

ubuntu/linux-oem-5.13*

ubuntu/linux-oem-5.6*

ubuntu/linux-oracle<5.4.0-1156.166

5.4.0-1156.166

ubuntu/linux-oracle-5.11*

ubuntu/linux-oracle-5.13*

ubuntu/linux-oracle-5.8*

ubuntu/linux-raspi<5.4.0-1143.156

5.4.0-1143.156

ubuntu/linux-raspi2*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.11*

ubuntu/linux-riscv-5.8*

ubuntu/linux-xilinx-zynqmp<5.4.0-1076.80

5.4.0-1076.80

ubuntu/linux-aws-fips<5.4.0-1158.168+fips1

5.4.0-1158.168+fips1

ubuntu/linux-azure-fips<5.4.0-1162.168+fips1

5.4.0-1162.168+fips1

ubuntu/linux-fips<5.4.0-1132.142

5.4.0-1132.142

ubuntu/linux-gcp-fips<5.4.0-1161.170+fips1

5.4.0-1161.170+fips1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux<5.15.0-135.146

5.15.0-135.146

ubuntu/linux-allwinner-5.19*

ubuntu/linux-aws<5.15.0-1080.87

5.15.0-1080.87

ubuntu/linux-aws-5.19*

ubuntu/linux-aws-6.2*

ubuntu/linux-aws-6.5*

ubuntu/linux-aws-6.8<6.8.0-1027.29~22.04.1

6.8.0-1027.29~22.04.1

ubuntu/linux-azure<5.15.0-1084.93

5.15.0-1084.93

ubuntu/linux-azure-5.19*

ubuntu/linux-azure-6.2*

ubuntu/linux-azure-6.5*

ubuntu/linux-azure-6.8<6.8.0-1027.32~22.04.1

6.8.0-1027.32~22.04.1

ubuntu/linux-azure-fde<5.15.0-1084.93.1

5.15.0-1084.93.1

ubuntu/linux-azure-fde-5.19*

ubuntu/linux-azure-fde-6.2*

ubuntu/linux-gcp<5.15.0-1079.88

5.15.0-1079.88

ubuntu/linux-gcp-5.19*

ubuntu/linux-gcp-6.2*

ubuntu/linux-gcp-6.5*

ubuntu/linux-gcp-6.8<6.8.0-1028.30~22.04.1

6.8.0-1028.30~22.04.1

ubuntu/linux-gke<5.15.0-1077.83

5.15.0-1077.83

ubuntu/linux-gkeop<5.15.0-1062.70

5.15.0-1062.70

ubuntu/linux-hwe-5.19*

ubuntu/linux-hwe-6.2*

ubuntu/linux-hwe-6.5*

ubuntu/linux-hwe-6.8<6.8.0-58.60~22.04.1

6.8.0-58.60~22.04.1

ubuntu/linux-ibm<5.15.0-1072.75

5.15.0-1072.75

ubuntu/linux-ibm-6.8<6.8.0-1024.24~22.04.1

6.8.0-1024.24~22.04.1

ubuntu/linux-intel-iot-realtime<5.15.0-1073.75

5.15.0-1073.75

ubuntu/linux-intel-iotg<5.15.0-1075.81

5.15.0-1075.81

ubuntu/linux-kvm<5.15.0-1076.81

5.15.0-1076.81

ubuntu/linux-lowlatency<5.15.0-135.146

5.15.0-135.146

ubuntu/linux-lowlatency-hwe-5.19*

ubuntu/linux-lowlatency-hwe-6.2*

ubuntu/linux-lowlatency-hwe-6.5*

ubuntu/linux-lowlatency-hwe-6.8<6.8.0-58.60.1~22.04.1

6.8.0-58.60.1~22.04.1

ubuntu/linux-nvidia<5.15.0-1074.75

5.15.0-1074.75

ubuntu/linux-nvidia-6.2*

ubuntu/linux-nvidia-6.5*

ubuntu/linux-nvidia-6.8<6.8.0-1026.29~22.04.1

6.8.0-1026.29~22.04.1

ubuntu/linux-nvidia-tegra<5.15.0-1033.33

5.15.0-1033.33

ubuntu/linux-nvidia-tegra-igx<5.15.0-1021.21

5.15.0-1021.21

ubuntu/linux-oem-5.17*

ubuntu/linux-oem-6.0*

ubuntu/linux-oem-6.1*

ubuntu/linux-oem-6.5*

ubuntu/linux-oracle<5.15.0-1077.83

5.15.0-1077.83

ubuntu/linux-oracle-6.5*

ubuntu/linux-oracle-6.8<6.8.0-1024.25~22.04.1

6.8.0-1024.25~22.04.1

ubuntu/linux-raspi<5.15.0-1074.77

5.15.0-1074.77

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.19*

ubuntu/linux-riscv-6.5*

ubuntu/linux-riscv-6.8<6.8.0-58.60.1~22.04.1

6.8.0-58.60.1~22.04.1

ubuntu/linux-starfive-5.19*

ubuntu/linux-starfive-6.2*

ubuntu/linux-starfive-6.5*

ubuntu/linux-xilinx-zynqmp<5.15.0-1044.48

5.15.0-1044.48

ubuntu/linux-bluefield<5.15.0-1062.64

5.15.0-1062.64

ubuntu/linux-realtime<5.15.0-1080.88

5.15.0-1080.88

ubuntu/linux-realtime-6.8<6.8.1-1020.21~22.04.1

6.8.1-1020.21~22.04.1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux-aws-fips<5.15.0-1080.87+fips1

5.15.0-1080.87+fips1

ubuntu/linux-azure-fips<5.15.0-1083.92+fips1

5.15.0-1083.92+fips1

ubuntu/linux-fips<5.15.0-135.146+fips1

5.15.0-135.146+fips1

ubuntu/linux-gcp-fips<5.15.0-1079.88+fips1

5.15.0-1079.88+fips1

ubuntu/linux<6.8.0-58.60

6.8.0-58.60

ubuntu/linux-aws<6.8.0-1027.29

6.8.0-1027.29

ubuntu/linux-azure<6.8.0-1027.32

6.8.0-1027.32

ubuntu/linux-azure-6.11<6.11.0-1012.12~24.04.1

6.11.0-1012.12~24.04.1

ubuntu/linux-azure-nvidia<6.8.0-1014.15

6.8.0-1014.15

ubuntu/linux-gcp<6.8.0-1028.30

6.8.0-1028.30

ubuntu/linux-gcp-6.11<6.11.0-1011.11~24.04.1

6.11.0-1011.11~24.04.1

ubuntu/linux-gke<6.8.0-1023.27

6.8.0-1023.27

ubuntu/linux-gkeop<6.8.0-1010.12

6.8.0-1010.12

ubuntu/linux-ibm<6.8.0-1024.24

6.8.0-1024.24

ubuntu/linux-lowlatency<6.8.0-58.60.1

6.8.0-58.60.1

ubuntu/linux-nvidia<6.8.0-1026.29

6.8.0-1026.29

ubuntu/linux-nvidia-6.11<6.11.0-1007.7

6.11.0-1007.7

ubuntu/linux-nvidia-lowlatency<6.8.0-1026.29.1

6.8.0-1026.29.1

ubuntu/linux-nvidia-tegra<6.8.0-1008.8

6.8.0-1008.8

ubuntu/linux-oem-6.11<6.11.0-1015.15

6.11.0-1015.15

ubuntu/linux-oem-6.8<6.8.0-1026.26

6.8.0-1026.26

ubuntu/linux-oracle<6.8.0-1024.25

6.8.0-1024.25

ubuntu/linux-raspi<6.8.0-1028.32

6.8.0-1028.32

ubuntu/linux-raspi-realtime*

ubuntu/linux-realtime*

ubuntu/linux-riscv<6.8.0-58.60.1

6.8.0-58.60.1

ubuntu/linux-xilinx<6.8.0-1017.18

6.8.0-1017.18

ubuntu/linux-raspi-realtime<6.8.0-2023.24

6.8.0-2023.24

ubuntu/linux-realtime<6.8.1-1020.21

6.8.1-1020.21

ubuntu/linux-fips<6.8.0-78.78+fips1

6.8.0-78.78+fips1

ubuntu/linux-vmware*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

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Fixed in 5.4.0-1161.170~18.04.1
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Fixed in 6.8.0-58.60.1~22.04.1
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Fixed in 5.15.0-1074.75
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Fixed in 6.8.0-1026.29~22.04.1
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Fixed in 5.15.0-1033.33
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Fixed in 5.15.0-1021.21
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Fixed in 5.15.0-1077.83
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Fixed in 6.8.0-1024.25~22.04.1
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Fixed in 5.15.0-1074.77
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Fixed in 6.8.0-58.60.1~22.04.1
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Fixed in 5.15.0-1044.48
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Fixed in 5.15.0-1062.64
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Fixed in 5.15.0-1080.88
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Fixed in 6.8.1-1020.21~22.04.1
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Fixed in 5.15.0-1080.87+fips1
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Fixed in 5.15.0-1083.92+fips1
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Fixed in 5.15.0-135.146+fips1
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Fixed in 5.15.0-1079.88+fips1
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Fixed in 6.8.0-58.60
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Fixed in 6.8.0-1027.29
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Fixed in 6.8.0-1027.32
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Fixed in 6.11.0-1012.12~24.04.1
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Fixed in 6.8.0-1014.15
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Fixed in 6.8.0-1028.30
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Fixed in 6.11.0-1011.11~24.04.1
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Fixed in 6.8.0-1023.27
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Fixed in 6.8.0-1010.12
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Fixed in 6.8.0-1024.24
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Fixed in 6.8.0-58.60.1
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Fixed in 6.8.0-1026.29
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Fixed in 6.11.0-1007.7
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Fixed in 6.8.0-1026.29.1
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Fixed in 6.8.0-1008.8
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Fixed in 6.11.0-1015.15
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Fixed in 6.8.0-1026.26
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Fixed in 6.8.0-1024.25
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Fixed in 6.8.0-1028.32
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Fixed in 6.8.0-58.60.1
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Fixed in 6.8.0-1017.18
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Fixed in 6.8.0-2023.24
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Fixed in 6.8.1-1020.21
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Fixed in 6.8.0-78.78+fips1
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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 6.12.116-1Fixed in 7.2.15-1Fixed in 7.3.3-1

Event History

Nov 19, 2024

CVE Published

via MITRE·05:19 PM

Data Sourced

via MITRE·05:19 PM

Description

Data Sourced

via Red Hat·06:03 PM

DescriptionSeverityAffected Software

Data Sourced

via OSV·06:15 PM

DescriptionSeverityAffected Software

Data Sourced

via NVD·06:15 PM

RemedyDescriptionSeverityAffected Software

Sep 4, 2025

Data Sourced

via Microsoft·04:36 AM

DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

DSA-5860

Peer vulnerabilities

Found alongside the following vulnerabilities.

Frequently Asked Questions

What is the severity of CVE-2024-50304?

CVE-2024-50304 has a moderate severity rating due to the potential impact on system stability.

How do I fix CVE-2024-50304?

To address CVE-2024-50304, update your Linux kernel to a version higher than 6.11.7 or apply the patches from the kernel repositories.

Which Linux kernel versions are affected by CVE-2024-50304?

CVE-2024-50304 affects Linux kernel versions from 3.10.12 up to 6.11.7, as well as versions 6.12-rc1 to 6.12-rc6.

What types of systems are impacted by CVE-2024-50304?

Systems running the affected versions of the Linux kernel, particularly those utilizing IP tunnel features, are impacted by CVE-2024-50304.

Is there a known exploit for CVE-2024-50304?

As of now, there is no publicly available exploit for CVE-2024-50304.

CVE-2024-50304: ipv4: ip_tunnel: Fix suspicious RCU usage warning in ip_tunnel_find()

Other sources

Affected Software

Remediation

Event History

Parent advisories

Peer vulnerabilities

Frequently Asked Questions

What is the severity of CVE-2024-50304?

How do I fix CVE-2024-50304?

Which Linux kernel versions are affected by CVE-2024-50304?

What types of systems are impacted by CVE-2024-50304?

Is there a known exploit for CVE-2024-50304?

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