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Unscored CVE-2022-49080 EUVD-2022-55124GHSA-rx6x-4frg-6jxm

mm/mempolicy: fix mpol_new leak in shared_policy_replace

Published Feb 26, 2025 · Updated May 11, 2026 · Assigned by Linux

Vendor: Linux Product: Linux Package: linux Package: linux Package: linux-allwinner-5.19 Package: linux-aws Package: linux-aws-5.0 Package: linux-aws-5.11 Package: linux-aws-5.13 Package: linux-aws-5.19 Package: linux-aws-5.3 Package: linux-aws-5.4 Package: linux-aws-5.8 Package: linux-aws-6.2 Package: linux-aws-6.5 Package: linux-aws-fips Package: linux-aws-hwe Package: linux-azure Package: linux-azure-4.15 Package: linux-azure-5.11 Package: linux-azure-5.13 Package: linux-azure-5.15 Package: linux-azure-5.19 Package: linux-azure-5.3 Package: linux-azure-5.4 Package: linux-azure-5.8 Package: linux-azure-6.2 Package: linux-azure-6.5 Package: linux-azure-edge Package: linux-azure-fde Package: linux-azure-fde-5.19 Package: linux-azure-fde-6.2 Package: linux-azure-fips Package: linux-bluefield Package: linux-fips Package: linux-gcp Package: linux-gcp-4.15 Package: linux-gcp-5.11 Package: linux-gcp-5.13 Package: linux-gcp-5.19 Package: linux-gcp-5.3 Package: linux-gcp-5.4 Package: linux-gcp-5.8 Package: linux-gcp-6.2 Package: linux-gcp-6.5 Package: linux-gcp-fips Package: linux-gke Package: linux-gke-4.15 Package: linux-gke-5.15 Package: linux-gke-5.4 Package: linux-gkeop Package: linux-gkeop-5.15 Package: linux-gkeop-5.4 Package: linux-hwe Package: linux-hwe-5.11 Package: linux-hwe-5.13 Package: linux-hwe-5.15 Package: linux-hwe-5.19 Package: linux-hwe-5.4 Package: linux-hwe-5.8 Package: linux-hwe-6.2 Package: linux-hwe-6.5 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-5.4 Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-intel-iotg Package: linux-intel-iotg-5.15 Package: linux-iot Package: linux-kvm Package: linux-lowlatency Package: linux-lowlatency-hwe-5.15 Package: linux-lowlatency-hwe-5.19 Package: linux-lowlatency-hwe-6.2 Package: linux-lowlatency-hwe-6.5 Package: linux-lts-xenial Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 Package: linux-oem Package: linux-oem-5.10 Package: linux-oem-5.13 Package: linux-oem-5.14 Package: linux-oem-5.17 Package: linux-oem-5.6 Package: linux-oem-6.0 Package: linux-oem-6.1 Package: linux-oem-6.5 Package: linux-oracle Package: linux-oracle-5.0 Package: linux-oracle-5.11 Package: linux-oracle-5.13 Package: linux-oracle-5.3 Package: linux-oracle-5.4 Package: linux-oracle-5.8 Package: linux-oracle-6.5 Package: linux-raspi Package: linux-raspi-5.4 Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-riscv Package: linux-riscv-5.11 Package: linux-riscv-5.19 Package: linux-riscv-5.8 Package: linux-riscv-6.5 Package: linux-starfive-5.19 Package: linux-starfive-6.2 Package: linux-starfive-6.5 Package: linux-vmware Platform: Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

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

mm/mempolicy: fix mpol_new leak in shared_policy_replace

If mpol_new is allocated but not used in restart loop, mpol_new will be
freed via mpol_put before returning to the caller. But refcnt is not
initialized yet, so mpol_put could not do the right things and might
leak the unused mpol_new. This would happen if mempolicy was updated on
the shared shmem file while the sp->lock has been dropped during the
memory allocation.

This issue could be triggered easily with the below code snippet if
there are many processes doing the below work at the same time:

shmid = shmget((key_t)5566, 1024 * PAGE_SIZE, 0666|IPC_CREAT);
shm = shmat(shmid, 0, 0);
loop many times {
mbind(shm, 1024 * PAGE_SIZE, MPOL_LOCAL, mask, maxnode, 0);
mbind(shm + 128 * PAGE_SIZE, 128 * PAGE_SIZE, MPOL_DEFAULT, mask,
maxnode, 0);
}

Affected products

VendorProductAffectedFixed
Linux Linux 3.8 4.9.311

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 linux 5.17.3-1 —
Debian 13 linux 5.17.3-1 —
Debian 12 linux 5.17.3-1 —
ReleasePackageFixed inAdvisory
Ubuntu 24.04 LTS linux-raspi-realtime No fix yet —
Ubuntu 22.04 LTS linux +1 5.15.0-37.39 —
Ubuntu 22.04 LTS linux-aws 5.15.0-1011.14 —
Ubuntu 22.04 LTS linux-azure 5.15.0-1010.12 —
Ubuntu 22.04 LTS linux-gcp 5.15.0-1008.12 —
Ubuntu 22.04 LTS linux-gke 5.15.0-1008.10 —
Ubuntu 22.04 LTS linux-ibm 5.15.0-1007.8 —
Ubuntu 22.04 LTS linux-intel-iotg 5.15.0-1008.11 —
Ubuntu 22.04 LTS linux-kvm 5.15.0-1010.11 —
Ubuntu 22.04 LTS linux-oracle 5.15.0-1009.12 —
Ubuntu 22.04 LTS linux-raspi 5.15.0-1011.13 —
Ubuntu 22.04 LTS linux-riscv +32 No fix yet —
Ubuntu 20.04 LTS linux 5.4.0-117.132 —
Ubuntu 20.04 LTS linux-aws +1 5.4.0-1078.84 —
Ubuntu 20.04 LTS linux-azure 5.4.0-1083.87 —
Ubuntu 20.04 LTS linux-azure-5.15 5.15.0-1008.9~20.04.1 —
Ubuntu 20.04 LTS linux-bluefield 5.4.0-1040.44 —
Ubuntu 20.04 LTS linux-gke +28 No fix yet —
Ubuntu 20.04 LTS linux-hwe-5.15 5.15.0-41.44~20.04.1 —
Ubuntu 20.04 LTS linux-ibm 5.4.0-1026.29 —
Ubuntu 20.04 LTS linux-intel-iotg-5.15 5.15.0-1008.11~20.04.1 —
Ubuntu 20.04 LTS linux-iot 5.4.0-1004.6 —
Ubuntu 20.04 LTS linux-kvm 5.4.0-1068.72 —
Ubuntu 20.04 LTS linux-lowlatency-hwe-5.15 5.15.0-42.45~20.04.1 —
Ubuntu 20.04 LTS linux-oracle 5.4.0-1076.83 —
Ubuntu 20.04 LTS linux-raspi 5.4.0-1065.75 —
Ubuntu 18.04 LTS linux 4.15.0-189.200 —
Ubuntu 18.04 LTS linux-aws 4.15.0-1137.148 —
Ubuntu 18.04 LTS linux-aws-5.4 +1 5.4.0-1078.84~18.04.1 —
Ubuntu 18.04 LTS linux-azure-4.15 4.15.0-1146.161 —
Ubuntu 18.04 LTS linux-azure-5.4 5.4.0-1083.87~18.04.1 —
Ubuntu 18.04 LTS linux-gcp +14 No fix yet —
Ubuntu 18.04 LTS linux-gcp-4.15 4.15.0-1131.147 —
Ubuntu 18.04 LTS linux-hwe-5.4 5.4.0-117.132~18.04.1 —
Ubuntu 18.04 LTS linux-ibm-5.4 5.4.0-1028.32~18.04.1 —
Ubuntu 18.04 LTS linux-kvm 4.15.0-1123.128 —
Ubuntu 18.04 LTS linux-oracle 4.15.0-1102.113 —
Ubuntu 18.04 LTS linux-oracle-5.4 5.4.0-1076.83~18.04.1 —
Ubuntu 18.04 LTS linux-raspi-5.4 5.4.0-1065.75~18.04.1 —
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Show 9 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro Realtime 22.04 LTS linux-realtime 5.15.0-1014.14 —
Ubuntu Pro FIPS 20.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro FIPS 18.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro FIPS 16.04 LTS linux-fips No fix yet —
Ubuntu Pro FIPS-updates 20.04 LTS linux-aws-fips +1 5.4.0-1078.84+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-azure-fips 5.4.0-1083.87+fips1 —
Ubuntu Pro FIPS-updates 20.04 LTS linux-fips 5.4.0-1054.61 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-aws-fips 4.15.0-2076.81 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-azure-fips 4.15.0-2057.63 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-fips 4.15.0-1094.105 —
Ubuntu Pro FIPS-updates 18.04 LTS linux-gcp-fips 4.15.0-2041.46 —
Ubuntu Pro FIPS-updates 16.04 LTS linux-fips No fix yet —
Ubuntu Pro 16.04 LTS linux +2 No fix yet —
Ubuntu Pro 16.04 LTS linux-aws-hwe 4.15.0-1137.148~16.04.1 —
Ubuntu Pro 16.04 LTS linux-azure 4.15.0-1146.161~16.04.1 —
Ubuntu Pro 16.04 LTS linux-gcp 4.15.0-1131.147~16.04.1 —
Ubuntu Pro 16.04 LTS linux-hwe 4.15.0-189.200~16.04.1 —
Ubuntu Pro 16.04 LTS linux-oracle 4.15.0-1102.113~16.04.1 —
Ubuntu Pro 14.04 LTS linux +2 No fix yet —
Ubuntu Pro 14.04 LTS linux-azure 4.15.0-1146.161~14.04.1 —
ReleasePackageFixed inAdvisory
RHEL 9 bpftool 7.0.0-284.11.1.el9_2 RHSA-2023:2458
RHEL 9 perf +48 5.14.0-284.11.1.el9_2 RHSA-2023:2458
RHEL 8 perf +26 4.18.0-513.5.1.el8_9 RHSA-2023:7077
ReleasePackageFixed inAdvisory
SLES 15 SP5 kernel-64kb +6 5.14.21-150500.55.97.1 SUSE-SU-2025:0833-2, SUSE-SU-2025:0833-1
SLES 15 SP5 kernel-default-base 5.14.21-150500.55.97.1.150500.6.45.1 SUSE-SU-2025:0833-2, SUSE-SU-2025:0833-1
SLES 15 SP4 kernel-64kb +6 5.14.21-150400.24.153.1 SUSE-SU-2025:0835-1
SLES 15 SP4 kernel-default-base 5.14.21-150400.24.153.1.150400.24.76.1 SUSE-SU-2025:0835-1
SLES 15 SP3 kernel-64kb +7 5.3.18-150300.59.198.1 SUSE-SU-2025:0855-1
SLES 15 SP3 kernel-default-base 5.3.18-150300.59.198.1.150300.18.118.1 SUSE-SU-2025:0855-1
SLES 12 SP5 kernel-syms +2 4.12.14-122.250.1 SUSE-SU-2025:0834-1
Show 18 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES for SAP 15 SP5 kernel-default-base 5.14.21-150500.55.97.1.150500.6.45.1 SUSE-SU-2025:0833-2, SUSE-SU-2025:0833-1
SLES for SAP 15 SP5 kernel-docs +4 5.14.21-150500.55.97.1 SUSE-SU-2025:0833-2, SUSE-SU-2025:0833-1
SLES for SAP 15 SP4 kernel-default-base 5.14.21-150400.24.153.1.150400.24.76.1 SUSE-SU-2025:0835-1
SLES for SAP 15 SP4 kernel-docs +4 5.14.21-150400.24.153.1 SUSE-SU-2025:0835-1
SLES for SAP 15 SP3 kernel-default-base 5.3.18-150300.59.198.1.150300.18.118.1 SUSE-SU-2025:0855-1
SLES for SAP 15 SP3 kernel-docs +5 5.3.18-150300.59.198.1 SUSE-SU-2025:0855-1
SLE Micro 5.5 kernel-default-base 5.14.21-150500.55.97.1.150500.6.45.1 SUSE-SU-2025:0833-2, SUSE-SU-2025:0833-1
SLE Micro 5.5 kernel-rt +1 5.14.21-150500.13.88.1 SUSE-SU-2025:0853-1
SLE Micro 5.5 kernel-source +1 5.14.21-150500.55.97.1 SUSE-SU-2025:0833-2, SUSE-SU-2025:0833-1
SLE Micro 5.4 kernel-default 5.14.21-150400.24.153.1 SUSE-SU-2025:0835-1
SLE Micro 5.4 kernel-default-base 5.14.21-150400.24.153.1.150400.24.76.1 SUSE-SU-2025:0835-1
SLE Micro 5.4 kernel-rt +1 5.14.21-150400.15.112.1 SUSE-SU-2025:0945-1
SLE Micro 5.3 kernel-default 5.14.21-150400.24.153.1 SUSE-SU-2025:0835-1
SLE Micro 5.3 kernel-default-base 5.14.21-150400.24.153.1.150400.24.76.1 SUSE-SU-2025:0835-1
SLE Micro 5.3 kernel-rt +1 5.14.21-150400.15.112.1 SUSE-SU-2025:0945-1
SLE Micro 5.2 kernel-default 5.3.18-150300.59.198.1 SUSE-SU-2025:0855-1
SLE Micro 5.2 kernel-default-base 5.3.18-150300.59.198.1.150300.18.118.1 SUSE-SU-2025:0855-1
SLE Micro 5.2 kernel-rt +1 5.3.18-150300.202.1 SUSE-SU-2025:0867-1
SLE Micro 5.1 kernel-default 5.3.18-150300.59.198.1 SUSE-SU-2025:0855-1
SLE Micro 5.1 kernel-default-base 5.3.18-150300.59.198.1.150300.18.118.1 SUSE-SU-2025:0855-1
SLE Micro 5.1 kernel-rt +1 5.3.18-150300.202.1 SUSE-SU-2025:0867-1
SLE Live Patching 15 SP5 kernel-default 5.14.21-150500.55.97.1 SUSE-SU-2025:0833-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_15 16-150500.2.2 SUSE-SU-2025:01869-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_19 9-150500.2.2 SUSE-SU-2025:01873-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_22 5-150500.2.2 SUSE-SU-2025:01875-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_23 2-150500.2.2 SUSE-SU-2025:01893-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_24 1-150500.11.3.1 SUSE-SU-2025:0833-1
SLE Live Patching 15 SP4 kernel-default 5.14.21-150400.24.153.1 SUSE-SU-2025:0835-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_27 16-150400.2.2 SUSE-SU-2025:01935-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_28 13-150400.2.2 SUSE-SU-2025:01906-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_29 11-150400.2.2 SUSE-SU-2025:01950-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_32 9-150400.2.2 SUSE-SU-2025:01928-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_34 7-150400.2.2 SUSE-SU-2025:01922-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_36 2-150400.2.2 SUSE-SU-2025:01927-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_37 1-150400.9.3.1 SUSE-SU-2025:0835-1
SLE Live Patching 15 SP3 kernel-default 5.3.18-150300.59.198.1 SUSE-SU-2025:0855-1
SLE Live Patching 15 SP3 kernel-livepatch-SLE15-SP3_Update_44 18-150300.2.2 SUSE-SU-2025:01906-1
SLE Live Patching 15 SP3 kernel-livepatch-SLE15-SP3_Update_49 10-150300.2.2 SUSE-SU-2025:01868-1
SLE Live Patching 15 SP3 kernel-livepatch-SLE15-SP3_Update_51 6-150300.2.2 SUSE-SU-2025:01892-1
SLE Live Patching 15 SP3 kernel-livepatch-SLE15-SP3_Update_52 5-150300.2.2 SUSE-SU-2025:01901-1
SLE Live Patching 15 SP3 kernel-livepatch-SLE15-SP3_Update_54 2-150300.2.2 SUSE-SU-2025:01956-1
SLE Live Patching 15 SP3 kernel-livepatch-SLE15-SP3_Update_55 1-150300.7.3.1 SUSE-SU-2025:0855-1
SLE Live Patching 12 SP5 kernel-default 4.12.14-122.250.1 SUSE-SU-2025:0834-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_56 17-2.1 SUSE-SU-2025:01899-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_57 14-2.1 SUSE-SU-2025:01844-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_58 12-2.1 SUSE-SU-2025:01901-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_59 11-2.1 SUSE-SU-2025:01906-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_60 10-2.1 SUSE-SU-2025:01849-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_61 18-4.1 SUSE-SU-2025:4123-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_65 2-2.1 SUSE-SU-2025:01907-1
SLE Live Patching 12 SP5 kgraft-patch-SLE12-SP5_Update_66 1-8.3.1 SUSE-SU-2025:0834-1
SLE HPC 15 SP5 kernel-64kb +5 5.14.21-150500.55.97.1 SUSE-SU-2025:0833-2, SUSE-SU-2025:0833-1
SLE HPC 15 SP5 kernel-default-base 5.14.21-150500.55.97.1.150500.6.45.1 SUSE-SU-2025:0833-2, SUSE-SU-2025:0833-1
SLE HPC 15 SP4 kernel-64kb +5 5.14.21-150400.24.153.1 SUSE-SU-2025:0835-1
SLE HPC 15 SP4 kernel-default-base 5.14.21-150400.24.153.1.150400.24.76.1 SUSE-SU-2025:0835-1
SLE HPC 15 SP3 kernel-64kb +6 5.3.18-150300.59.198.1 SUSE-SU-2025:0855-1
SLE HPC 15 SP3 kernel-default-base 5.3.18-150300.59.198.1.150300.18.118.1 SUSE-SU-2025:0855-1
SUSE Manager Server 4.3 kernel-default-base 5.14.21-150400.24.153.1.150400.24.76.1 SUSE-SU-2025:0835-1
SUSE Manager Server 4.3 kernel-syms +3 5.14.21-150400.24.153.1 SUSE-SU-2025:0835-1
SUSE Manager Proxy 4.3 kernel-default-base 5.14.21-150400.24.153.1.150400.24.76.1 SUSE-SU-2025:0835-1
SUSE Manager Proxy 4.3 kernel-syms +2 5.14.21-150400.24.153.1 SUSE-SU-2025:0835-1
SUSE Enterprise Storage 7.1 kernel-64kb +6 5.3.18-150300.59.198.1 SUSE-SU-2025:0855-1
SUSE Enterprise Storage 7.1 kernel-default-base 5.3.18-150300.59.198.1.150300.18.118.1 SUSE-SU-2025:0855-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2 kernel-livepatch-4.14.276-211.499 1.0-0.amzn2 ALAS2-2024-2569
Amazon Linux 2 perf +8 4.14.276-211.499.amzn2 ALAS2-2024-2569

Advisories 30

References