UBUNTU-CVE-2022-48986: Medium severity ubuntu/linux-azure vulnerability

Q: What access would an attacker need to exploit this issue?

The vulnerability is locally exploitable and requires low privileges; no user interaction is required. The reported impact is denial of service through a kernel panic, with high impact to availability and no indicated confidentiality or integrity impact.

Q: Which systems are most likely to be exposed?

The issue concerns DAX-backed huge PUD mappings. The description specifically notes x86 behavior and indicates that the affected path can fail when hugetlb is not configured, even though DAX itself does not depend on hugetlb.

Q: How can I identify signs that a system has already encountered this problem?

Review kernel panic logs for a general protection fault during get_user_pages_fast, with related frames such as iov_iter_get_pages, bio_iov_iter_get_pages, blkdev_direct_IO, generic_file_direct_write, and io_uring submission functions. The supplied trace shows this sequence occurring during a write path.

Q: Which Ubuntu kernel package families are listed as affected?

The listed software includes ubuntu/linux, ubuntu/linux-azure, ubuntu/linux-gcp, ubuntu/linux-oracle, ubuntu/linux-fips, ubuntu/linux-aws, ubuntu/linux-kvm, and ubuntu/linux-aws-fips. No fixed package versions are provided in the available data.

Published Oct 21, 2024

Updated

In the Linux kernel, the following vulnerability has been resolved: mm/gup: fix guppudrange() for dax For dax pud, pudhuge() returns true on x86. So the function works as long as hugetlb is configured. However, dax doesn't depend on hugetlb. Commit 414fd080d125 ("mm/gup: fix guppmdrange() for dax") fixed devmap-backed huge PMDs, but missed devmap-backed huge PUDs. Fix this as well. This fixes the below kernel panic: general protection fault, probably for non-canonical address 0x69e7c000cc478: 0000 [#1] SMP < snip > Call Trace: <TASK> getuserpagesfast+0x1f/0x40 iovitergetpages+0xc6/0x3b0 ? mempoolalloc+0x5d/0x170 bioiovitergetpages+0x82/0x4e0 ? bvecalloc+0x91/0xc0 ? bioallocbioset+0x19a/0x2a0 blkdevdirectIO+0x282/0x480 ? iocompleterwcommon+0xc0/0xc0 ? filemaprangehaspage+0x82/0xc0 genericfiledirectwrite+0x9d/0x1a0 ? inodeupdatetime+0x24/0x30 genericfilewriteiter+0xbd/0x1e0 blkdevwriteiter+0xb4/0x150 ? ioimportiovec+0x8d/0x340 iowrite+0xf9/0x300 ioissuesqe+0x3c3/0x1d30 ? sysvecrescheduleipi+0x6c/0x80 ioqueuesqe+0x33/0x240 ? fget+0x76/0xa0 iosubmitsqes+0xe6a/0x18d0 ? fgetlight+0xd1/0x100 x64sysiouringenter+0x199/0x880 ? contexttrackingenter+0x1f/0x70 ? irqentryexittousermode+0x24/0x30 ? irqentryexit+0x1d/0x30 ? contexttrackingexit+0xe/0x70 dosyscall64+0x3b/0x90 entrySYSCALL64afterhwframe+0x61/0xcb RIP: 0033:0x7fc97c11a7be < snip > </TASK> ---[ end trace 48b2e0e67debcaeb ]--- RIP: 0010:internalgetuserpagesfast+0x340/0x990 < snip > Kernel panic - not syncing: Fatal exception Kernel Offset: disabled

Affected Software

147 affected componentsFixes available

ubuntu/linux-azure<4.15.0-1196.211~14.04.1

4.15.0-1196.211~14.04.1

ubuntu/linux-aws-hwe<4.15.0-1188.201~16.04.1

4.15.0-1188.201~16.04.1

ubuntu/linux-azure<4.15.0-1196.211~16.04.1

4.15.0-1196.211~16.04.1

ubuntu/linux-gcp<4.15.0-1181.198~16.04.1

4.15.0-1181.198~16.04.1

ubuntu/linux-hwe<4.15.0-246.258~16.04.1

4.15.0-246.258~16.04.1

ubuntu/linux-oracle<4.15.0-1150.161~16.04.1

4.15.0-1150.161~16.04.1

ubuntu/linux-hwe-edge*

ubuntu/linux-aws-5.4<5.4.0-1097.105~18.04.1

5.4.0-1097.105~18.04.1

ubuntu/linux-azure-5.4<5.4.0-1104.110~18.04.1

5.4.0-1104.110~18.04.1

ubuntu/linux-gcp-5.4<5.4.0-1101.110~18.04.1

5.4.0-1101.110~18.04.1

ubuntu/linux-hwe-5.4<5.4.0-144.161~18.04.1

5.4.0-144.161~18.04.1

ubuntu/linux-ibm-5.4<5.4.0-1045.50~18.04.1

5.4.0-1045.50~18.04.1

ubuntu/linux-oracle-5.4<5.4.0-1094.103~18.04.1

5.4.0-1094.103~18.04.1

ubuntu/linux-raspi-5.4<5.4.0-1081.92~18.04.1

5.4.0-1081.92~18.04.1

ubuntu/linux<4.15.0-246.258

4.15.0-246.258

ubuntu/linux-aws<4.15.0-1188.201

4.15.0-1188.201

ubuntu/linux-aws-5.0*

ubuntu/linux-aws-5.3*

ubuntu/linux-azure*

ubuntu/linux-azure-4.15<4.15.0-1196.211

4.15.0-1196.211

ubuntu/linux-azure-5.3*

ubuntu/linux-azure-edge*

ubuntu/linux-gcp*

ubuntu/linux-gcp-4.15<4.15.0-1181.198

4.15.0-1181.198

ubuntu/linux-gcp-5.3*

ubuntu/linux-gke-4.15*

ubuntu/linux-gke-5.4*

ubuntu/linux-gkeop-5.4*

ubuntu/linux-hwe*

ubuntu/linux-hwe-edge*

ubuntu/linux-kvm<4.15.0-1170.175

4.15.0-1170.175

ubuntu/linux-oem*

ubuntu/linux-oracle<4.15.0-1150.161

4.15.0-1150.161

ubuntu/linux-oracle-5.0*

ubuntu/linux-oracle-5.3*

ubuntu/linux-aws-fips<4.15.0-2126.132

4.15.0-2126.132

ubuntu/linux-azure-fips<4.15.0-2105.111

4.15.0-2105.111

ubuntu/linux-fips<4.15.0-1143.155

4.15.0-1143.155

ubuntu/linux-gcp-fips<4.15.0-2089.95

4.15.0-2089.95

ubuntu/linux-fips*

ubuntu/linux<5.4.0-144.161

5.4.0-144.161

ubuntu/linux-aws<5.4.0-1097.105

5.4.0-1097.105

ubuntu/linux-aws-5.15<5.15.0-1031.35~20.04.1

5.15.0-1031.35~20.04.1

ubuntu/linux-azure<5.4.0-1104.110

5.4.0-1104.110

ubuntu/linux-azure-5.15<5.15.0-1034.41~20.04.1

5.15.0-1034.41~20.04.1

ubuntu/linux-bluefield<5.4.0-1059.65

5.4.0-1059.65

ubuntu/linux-gcp<5.4.0-1101.110

5.4.0-1101.110

ubuntu/linux-gcp-5.15<5.15.0-1030.37~20.04.1

5.15.0-1030.37~20.04.1

ubuntu/linux-gkeop<5.4.0-1065.69

5.4.0-1065.69

ubuntu/linux-gkeop-5.15<5.15.0-1016.21~20.04.1

5.15.0-1016.21~20.04.1

ubuntu/linux-hwe-5.15<5.15.0-67.74~20.04.1

5.15.0-67.74~20.04.1

ubuntu/linux-ibm<5.4.0-1045.50

5.4.0-1045.50

ubuntu/linux-intel-iotg-5.15<5.15.0-1026.31~20.04.1

5.15.0-1026.31~20.04.1

ubuntu/linux-iot<5.4.0-1013.15

5.4.0-1013.15

ubuntu/linux-kvm<5.4.0-1087.93

5.4.0-1087.93

ubuntu/linux-lowlatency-hwe-5.15<5.15.0-67.74~20.04.1

5.15.0-67.74~20.04.1

ubuntu/linux-nvidia-tegra-5.15<5.15.0-1014.14~20.04.1

5.15.0-1014.14~20.04.1

ubuntu/linux-oracle<5.4.0-1094.103

5.4.0-1094.103

ubuntu/linux-oracle-5.15<5.15.0-1030.36~20.04.1

5.15.0-1030.36~20.04.1

ubuntu/linux-raspi<5.4.0-1081.92

5.4.0-1081.92

ubuntu/linux-riscv-5.15<5.15.0-1030.34~20.04.1

5.15.0-1030.34~20.04.1

ubuntu/linux-xilinx-zynqmp<5.4.0-1022.26

5.4.0-1022.26

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<5.4.0-1099.107+fips1

5.4.0-1099.107+fips1

ubuntu/linux-azure-fips<5.4.0-1104.110+fips1

5.4.0-1104.110+fips1

ubuntu/linux-fips<5.4.0-1073.82

5.4.0-1073.82

ubuntu/linux-gcp-fips<5.4.0-1101.110+fips1

5.4.0-1101.110+fips1

ubuntu/linux-aws-fips*

ubuntu/linux-azure-fips*

ubuntu/linux-fips*

ubuntu/linux-gcp-fips*

ubuntu/linux<5.15.0-67.74

5.15.0-67.74

ubuntu/linux-allwinner-5.19*

ubuntu/linux-aws<5.15.0-1031.35

5.15.0-1031.35

ubuntu/linux-aws-5.19*

ubuntu/linux-aws-6.2*

ubuntu/linux-aws-6.5*

ubuntu/linux-azure<5.15.0-1034.41

5.15.0-1034.41

ubuntu/linux-azure-5.19*

ubuntu/linux-azure-6.2*

ubuntu/linux-azure-6.5*

ubuntu/linux-azure-fde<5.15.0-1034.41.1

5.15.0-1034.41.1

ubuntu/linux-azure-fde-5.19*

ubuntu/linux-azure-fde-6.2*

ubuntu/linux-gcp<5.15.0-1030.37

5.15.0-1030.37

ubuntu/linux-gcp-5.19*

ubuntu/linux-gcp-6.2*

ubuntu/linux-gcp-6.5*

ubuntu/linux-gke<5.15.0-1028.33

5.15.0-1028.33

ubuntu/linux-gkeop<5.15.0-1016.21

5.15.0-1016.21

ubuntu/linux-hwe-5.19*

ubuntu/linux-hwe-6.2*

ubuntu/linux-hwe-6.5*

ubuntu/linux-ibm<5.15.0-1026.29

5.15.0-1026.29

ubuntu/linux-intel-iotg<5.15.0-1026.31

5.15.0-1026.31

ubuntu/linux-kvm<5.15.0-1029.34

5.15.0-1029.34

ubuntu/linux-lowlatency<5.15.0-67.74

5.15.0-67.74

ubuntu/linux-lowlatency-hwe-5.19*

ubuntu/linux-lowlatency-hwe-6.2*

ubuntu/linux-lowlatency-hwe-6.5*

ubuntu/linux-nvidia<5.15.0-1023.23

5.15.0-1023.23

ubuntu/linux-nvidia-6.2*

ubuntu/linux-nvidia-6.5*

ubuntu/linux-oem-5.17*

ubuntu/linux-oem-6.0*

ubuntu/linux-oem-6.1*

ubuntu/linux-oem-6.5*

ubuntu/linux-oracle<5.15.0-1030.36

5.15.0-1030.36

ubuntu/linux-oracle-6.5*

ubuntu/linux-raspi<5.15.0-1025.27

5.15.0-1025.27

ubuntu/linux-realtime*

ubuntu/linux-riscv*

ubuntu/linux-riscv-5.19*

ubuntu/linux-riscv-6.5*

ubuntu/linux-starfive-5.19*

ubuntu/linux-starfive-6.2*

ubuntu/linux-starfive-6.5*

ubuntu/linux-bluefield<5.15.0-1014.16

5.15.0-1014.16

ubuntu/linux-intel-iot-realtime<5.15.0-1022.27

5.15.0-1022.27

ubuntu/linux-realtime<5.15.0-1033.36

5.15.0-1033.36

ubuntu/linux-raspi-realtime*

ubuntu/linux-vmware*

Remediation

Recommended actions to resolve this vulnerability, in priority order.

Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 4.15.0-1196.211~14.04.1
Upgrade
Upgrade ubuntu/linux-aws-hwe to a version that resolves this vulnerability.
Fixed in 4.15.0-1188.201~16.04.1
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 4.15.0-1196.211~16.04.1
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 4.15.0-1181.198~16.04.1
Upgrade
Upgrade ubuntu/linux-hwe to a version that resolves this vulnerability.
Fixed in 4.15.0-246.258~16.04.1
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 4.15.0-1150.161~16.04.1
Upgrade
Upgrade ubuntu/linux-aws-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1097.105~18.04.1
Upgrade
Upgrade ubuntu/linux-azure-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1104.110~18.04.1
Upgrade
Upgrade ubuntu/linux-gcp-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1101.110~18.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-144.161~18.04.1
Upgrade
Upgrade ubuntu/linux-ibm-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1045.50~18.04.1
Upgrade
Upgrade ubuntu/linux-oracle-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1094.103~18.04.1
Upgrade
Upgrade ubuntu/linux-raspi-5.4 to a version that resolves this vulnerability.
Fixed in 5.4.0-1081.92~18.04.1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 4.15.0-246.258
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 4.15.0-1188.201
Upgrade
Upgrade ubuntu/linux-azure-4.15 to a version that resolves this vulnerability.
Fixed in 4.15.0-1196.211
Upgrade
Upgrade ubuntu/linux-gcp-4.15 to a version that resolves this vulnerability.
Fixed in 4.15.0-1181.198
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 4.15.0-1170.175
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 4.15.0-1150.161
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-2126.132
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-2105.111
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-1143.155
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 4.15.0-2089.95
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 5.4.0-144.161
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 5.4.0-1097.105
Upgrade
Upgrade ubuntu/linux-aws-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1031.35~20.04.1
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 5.4.0-1104.110
Upgrade
Upgrade ubuntu/linux-azure-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1034.41~20.04.1
Upgrade
Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.
Fixed in 5.4.0-1059.65
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 5.4.0-1101.110
Upgrade
Upgrade ubuntu/linux-gcp-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1030.37~20.04.1
Upgrade
Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.
Fixed in 5.4.0-1065.69
Upgrade
Upgrade ubuntu/linux-gkeop-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1016.21~20.04.1
Upgrade
Upgrade ubuntu/linux-hwe-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-67.74~20.04.1
Upgrade
Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.
Fixed in 5.4.0-1045.50
Upgrade
Upgrade ubuntu/linux-intel-iotg-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1026.31~20.04.1
Upgrade
Upgrade ubuntu/linux-iot to a version that resolves this vulnerability.
Fixed in 5.4.0-1013.15
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 5.4.0-1087.93
Upgrade
Upgrade ubuntu/linux-lowlatency-hwe-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-67.74~20.04.1
Upgrade
Upgrade ubuntu/linux-nvidia-tegra-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1014.14~20.04.1
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 5.4.0-1094.103
Upgrade
Upgrade ubuntu/linux-oracle-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1030.36~20.04.1
Upgrade
Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 5.4.0-1081.92
Upgrade
Upgrade ubuntu/linux-riscv-5.15 to a version that resolves this vulnerability.
Fixed in 5.15.0-1030.34~20.04.1
Upgrade
Upgrade ubuntu/linux-xilinx-zynqmp to a version that resolves this vulnerability.
Fixed in 5.4.0-1022.26
Upgrade
Upgrade ubuntu/linux-aws-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1099.107+fips1
Upgrade
Upgrade ubuntu/linux-azure-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1104.110+fips1
Upgrade
Upgrade ubuntu/linux-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1073.82
Upgrade
Upgrade ubuntu/linux-gcp-fips to a version that resolves this vulnerability.
Fixed in 5.4.0-1101.110+fips1
Upgrade
Upgrade ubuntu/linux to a version that resolves this vulnerability.
Fixed in 5.15.0-67.74
Upgrade
Upgrade ubuntu/linux-aws to a version that resolves this vulnerability.
Fixed in 5.15.0-1031.35
Upgrade
Upgrade ubuntu/linux-azure to a version that resolves this vulnerability.
Fixed in 5.15.0-1034.41
Upgrade
Upgrade ubuntu/linux-azure-fde to a version that resolves this vulnerability.
Fixed in 5.15.0-1034.41.1
Upgrade
Upgrade ubuntu/linux-gcp to a version that resolves this vulnerability.
Fixed in 5.15.0-1030.37
Upgrade
Upgrade ubuntu/linux-gke to a version that resolves this vulnerability.
Fixed in 5.15.0-1028.33
Upgrade
Upgrade ubuntu/linux-gkeop to a version that resolves this vulnerability.
Fixed in 5.15.0-1016.21
Upgrade
Upgrade ubuntu/linux-ibm to a version that resolves this vulnerability.
Fixed in 5.15.0-1026.29
Upgrade
Upgrade ubuntu/linux-intel-iotg to a version that resolves this vulnerability.
Fixed in 5.15.0-1026.31
Upgrade
Upgrade ubuntu/linux-kvm to a version that resolves this vulnerability.
Fixed in 5.15.0-1029.34
Upgrade
Upgrade ubuntu/linux-lowlatency to a version that resolves this vulnerability.
Fixed in 5.15.0-67.74
Upgrade
Upgrade ubuntu/linux-nvidia to a version that resolves this vulnerability.
Fixed in 5.15.0-1023.23
Upgrade
Upgrade ubuntu/linux-oracle to a version that resolves this vulnerability.
Fixed in 5.15.0-1030.36
Upgrade
Upgrade ubuntu/linux-raspi to a version that resolves this vulnerability.
Fixed in 5.15.0-1025.27
Upgrade
Upgrade ubuntu/linux-bluefield to a version that resolves this vulnerability.
Fixed in 5.15.0-1014.16
Upgrade
Upgrade ubuntu/linux-intel-iot-realtime to a version that resolves this vulnerability.
Fixed in 5.15.0-1022.27
Upgrade
Upgrade ubuntu/linux-realtime to a version that resolves this vulnerability.
Fixed in 5.15.0-1033.36

Event History

Oct 21, 2024

CVE Published

via OSV·08:15 PM

Data Sourced

via OSV·08:15 PM

DescriptionSeverityAffected Software

Frequently Asked Questions

What access would an attacker need to exploit this issue?

The vulnerability is locally exploitable and requires low privileges; no user interaction is required. The reported impact is denial of service through a kernel panic, with high impact to availability and no indicated confidentiality or integrity impact.

Which systems are most likely to be exposed?

The issue concerns DAX-backed huge PUD mappings. The description specifically notes x86 behavior and indicates that the affected path can fail when hugetlb is not configured, even though DAX itself does not depend on hugetlb.

How can I identify signs that a system has already encountered this problem?

Review kernel panic logs for a general protection fault during get_user_pages_fast, with related frames such as iov_iter_get_pages, bio_iov_iter_get_pages, blkdev_direct_IO, generic_file_direct_write, and io_uring submission functions. The supplied trace shows this sequence occurring during a write path.

Which Ubuntu kernel package families are listed as affected?

The listed software includes ubuntu/linux, ubuntu/linux-azure, ubuntu/linux-gcp, ubuntu/linux-oracle, ubuntu/linux-fips, ubuntu/linux-aws, ubuntu/linux-kvm, and ubuntu/linux-aws-fips. No fixed package versions are provided in the available data.

UBUNTU-CVE-2022-48986: Medium severity ubuntu/linux-azure vulnerability

Affected Software

Remediation

Event History

Frequently Asked Questions

What access would an attacker need to exploit this issue?

Which systems are most likely to be exposed?

How can I identify signs that a system has already encountered this problem?

Which Ubuntu kernel package families are listed as affected?

Company

Resources

Contact

Frequently Asked Questions

What access would an attacker need to exploit this issue?

Which systems are most likely to be exposed?

How can I identify signs that a system has already encountered this problem?

Which Ubuntu kernel package families are listed as affected?