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Fencer Vulns
high 8.2

CVE-2025-71072 json

shmem: fix recovery on rename failures

published 2026-01-13 9 mo ago modified 2026-10-21 18 d ago also EUVD-2026-2281

cvss
8.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 30%
public exploits
0
none known

Summary

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

shmem: fix recovery on rename failures

maple_tree insertions can fail if we are seriously short on memory; simple_offset_rename() does not recover well if it runs into that. The same goes for simple_offset_rename_exchange().

Moreover, shmem_whiteout() expects that if it succeeds, the caller will progress to d_move(), i.e. that shmem_rename2() won't fail past the successful call of shmem_whiteout().

Not hard to fix, fortunately - mtree_store() can't fail if the index we are trying to store into is already present in the tree as a singleton.

For simple_offset_rename_exchange() that's enough - we just need to be careful about the order of operations.

For simple_offset_rename() solution is to preinsert the target into the tree for new_dir; the rest can be done without any potentially failing operations.

That preinsertion has to be done in shmem_rename2() rather than in simple_offset_rename() itself - otherwise we'd need to deal with the possibility of failure after successful shmem_whiteout().

Patch / fix

  • Linux Linux 6.6.160, 6.12.64, 6.18.3, 6.19
  • linux Debian 13 6.12.69-1
  • linux Debian 14 6.18.3-1

debian advisories DEBIAN-CVE-2025-71072

  • linux Ubuntu 24.04 LTS 6.8.0-110.110
  • linux Ubuntu 25.10 6.17.0-22.22
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1052.55
  • linux-aws Ubuntu 25.10 6.17.0-1012.12
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1054.57
  • linux-gcp Ubuntu 25.10 6.17.0-1012.12
  • linux-gke Ubuntu 24.04 LTS 6.8.0-1050.56
  • linux-ibm Ubuntu 24.04 LTS 6.8.0-1051.51

ubuntu advisories UBUNTU-CVE-2025-71072

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel RHEL 10.2 6.12.0-211.46.1.el10_2
  • rv RHEL 10.2 6.12.0-211.46.1.el10_2
  • perf RHEL 10.2 6.12.0-211.46.1.el10_2
  • rtla RHEL 10.2 6.12.0-211.46.1.el10_2
  • libperf RHEL 10.2 6.12.0-211.46.1.el10_2
  • kernel-rt RHEL 10.2 6.12.0-211.46.1.el10_2
  • kernel-64k RHEL 10.2 6.12.0-211.46.1.el10_2
  • kernel-core RHEL 10.2 6.12.0-211.46.1.el10_2

red hat advisories RHSA-2026:53330

  • kernel AlmaLinux 10 6.12.0-211.46.1.el10_2
  • rv AlmaLinux 10 6.12.0-211.46.1.el10_2
  • perf AlmaLinux 10 6.12.0-211.46.1.el10_2
  • rtla AlmaLinux 10 6.12.0-211.46.1.el10_2
  • libperf AlmaLinux 10 6.12.0-211.46.1.el10_2
  • kernel-rt AlmaLinux 10 6.12.0-211.46.1.el10_2
  • kernel-64k AlmaLinux 10 6.12.0-211.46.1.el10_2
  • kernel-core AlmaLinux 10 6.12.0-211.46.1.el10_2

almalinux advisories ALSA-2026:53330

  • kernel Rocky Linux 10 6.12.0-211.46.1.el10_2

rocky linux advisories RLSA-2026:53330

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-71072 updated cvss 2.5

kernel: shmem: fix recovery on rename failures

  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    affected: no fix planned “Out of support scope”
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.46.1.el10_2, perf 6.12.0-211.46.1.el10_2, rtla 6.12.0-211.46.1.el10_2, python3-perf 6.12.0-211.46.1.el10_2, kernel-devel-matched 6.12.0-211.46.1.el10_2, kernel-64k-devel-matched 6.12.0-211.46.1.el10_2, +7 more Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.46.1.el10_2, kernel-64k 6.12.0-211.46.1.el10_2, kernel-core 6.12.0-211.46.1.el10_2, kernel-tools 6.12.0-211.46.1.el10_2, kernel-modules 6.12.0-211.46.1.el10_2, kernel-64k-core 6.12.0-211.46.1.el10_2, +28 more Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.46.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.46.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.46.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.46.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.46.1.el10_2 Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.46.1.el10_2, kernel-rt-64k 6.12.0-211.46.1.el10_2, kernel-rt-core 6.12.0-211.46.1.el10_2, kernel-rt-modules 6.12.0-211.46.1.el10_2, kernel-rt-64k-core 6.12.0-211.46.1.el10_2, kernel-rt-debug-core 6.12.0-211.46.1.el10_2, +14 more Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.46.1.el10_2, kernel-rt-core 6.12.0-211.46.1.el10_2, kernel-rt-modules 6.12.0-211.46.1.el10_2, kernel-rt-debug-core 6.12.0-211.46.1.el10_2, kernel-rt-modules-core 6.12.0-211.46.1.el10_2, kernel-rt-debug-modules 6.12.0-211.46.1.el10_2, +4 more
    fixed: vendor fix RHSA-2026:53330
  • Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 more Red Hat Enterprise Linux 8 perf, kernel, bpftool, kernel-rt, kernel-core, kernel-tools, +29 more Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.36% chance of exploitation in the next 30 days, higher than 30% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 8.2 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Linux Linux

Classification

Technology feeds

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.