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Fencer Intel
critical 9.8

CVE-2026-64160 in the critical feed json

netfs: Fix potential for tearing in ->remote_i_size and ->zero_point

published 3mo ago modified 23d ago also EUVD-2026-45845

cvss
9.8
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 37%
public exploits
0
none known

Summary

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

netfs: Fix potential for tearing in ->remote_i_size and ->zero_point

Fix potential tearing in using ->remote_i_size and ->zero_point by copying i_size_read() and i_size_write() and using the same seqcount as for i_size.

We need to make sure that netfslib and the filesystems that use it always hold i_lock whilst updating any of the sizes to prevent i_size_seqcount from getting corrupted.

Patch / fix

  • Linux Linux 7.0.11, 7.1
  • linux Debian 14 7.0.12-1

debian advisories DEBIAN-CVE-2026-64160

  • linux Ubuntu 26.04 LTS 7.0.0-28.28
  • linux-aws Ubuntu 26.04 LTS 7.0.0-1009.9
  • linux-gcp Ubuntu 26.04 LTS 7.0.0-1008.8
  • linux-gke Ubuntu 26.04 LTS 7.0.0-1003.4
  • linux-ibm Ubuntu 26.04 LTS 7.0.0-1010.10
  • linux-azure Ubuntu 26.04 LTS 7.0.0-1010.10
  • linux-raspi Ubuntu 26.04 LTS 7.0.0-1015.15
  • linux-riscv Ubuntu 26.04 LTS 7.0.0-28.28.1

ubuntu advisories UBUNTU-CVE-2026-64160

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

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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-2026-64160 updated cvss 5.3

kernel: netfs: Fix potential for tearing in ->remote_i_size and ->zero_point

  • Red Hat Enterprise Linux 9 rv, perf, rtla, kernel, bpftool, libperf, +83 more Red Hat Enterprise Linux 10 kernel
    affected: workaround, no fix available
  • Red Hat Enterprise Linux AppStream EUS (v.10.2) rv 6.12.0-211.75.1.el10_2, perf 6.12.0-211.75.1.el10_2, rtla 6.12.0-211.75.1.el10_2, python3-perf 6.12.0-211.75.1.el10_2, kernel-devel-matched 6.12.0-211.75.1.el10_2, kernel-64k-devel-matched 6.12.0-211.75.1.el10_2, +7 more Red Hat Enterprise Linux BaseOS EUS (v.10.2) kernel 6.12.0-211.75.1.el10_2, kernel-64k 6.12.0-211.75.1.el10_2, kernel-core 6.12.0-211.75.1.el10_2, kernel-tools 6.12.0-211.75.1.el10_2, kernel-modules 6.12.0-211.75.1.el10_2, kernel-64k-core 6.12.0-211.75.1.el10_2, +28 more Red Hat Enterprise Linux CodeReady Linux Builder EUS (v.10.2) libperf 6.12.0-211.75.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.75.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.75.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.75.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.75.1.el10_2 Red Hat Enterprise Linux Real Time EUS (v.10.2) kernel-rt 6.12.0-211.75.1.el10_2, kernel-rt-64k 6.12.0-211.75.1.el10_2, kernel-rt-core 6.12.0-211.75.1.el10_2, kernel-rt-modules 6.12.0-211.75.1.el10_2, kernel-rt-64k-core 6.12.0-211.75.1.el10_2, kernel-rt-debug-core 6.12.0-211.75.1.el10_2, +14 more Red Hat Enterprise Linux Real Time for NFV EUS (v.10.2) kernel-rt 6.12.0-211.75.1.el10_2, kernel-rt-core 6.12.0-211.75.1.el10_2, kernel-rt-modules 6.12.0-211.75.1.el10_2, kernel-rt-debug-core 6.12.0-211.75.1.el10_2, kernel-rt-modules-core 6.12.0-211.75.1.el10_2, kernel-rt-debug-modules 6.12.0-211.75.1.el10_2, +4 more
    fixed: vendor fix RHSA-2026:99139
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more 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
    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

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
26d ago

Exploit prediction

0.43% chance of exploitation in the next 30 days, higher than 37% of all scored CVEs (FIRST EPSS, 2026-11-11).

CVSS scores

assigned by version score vector
CNA 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • Linux Linux

Classification

Weakness
  • CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization
Technology feeds

References

Sources

Fencer Intel 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.