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Fencer Vulns
high 7.8

CVE-2026-64600 json

xfs: resample the data fork mapping after cycling ILOCK

published 2026-07-23 3 mo ago modified 2026-10-19 20 d ago also EUVD-2026-47879

cvss
7.8
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 40%
public exploits
0
none known

Summary

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

xfs: resample the data fork mapping after cycling ILOCK

xfs_reflink_fill_{cow_hole,delalloc} are both presented with an inode, a data fork mapping, and a cow fork mapping. Unfortunately, these two helpers cycle the ILOCK to grab a transaction, which means that the mappings are stale as soon as we reacquire the ILOCK. Currently we refresh the cow fork mapping by re-calling xfs_find_trim_cow_extent, but we don't refresh the data fork mapping beforehand, which means that the xfs_bmap_trim_cow in that function queries the refcount btree about the wrong physical blocks and returns an inaccurate value in *shared.

If *shared is now false, the directio write proceeds with a stale data fork mapping. Fix this by querying the data fork mapping if the sequence counter changes across the ILOCK cycle.

Patch / fix

  • Linux Linux 5.15.212, 6.1.178, 6.6.145, 6.12.96, 6.18.39, 7.1.4, 7.2
  • linux Debian 12 6.1.180-1
  • linux Debian 13 6.12.96-1
  • linux Debian 14 7.1.4-1
  • linux-6.12 Debian 12 6.12.100-1~deb12u1

debian advisories DEBIAN-CVE-2026-64600

  • linux Ubuntu 22.04 LTS 5.15.0-198.208
  • linux Ubuntu 24.04 LTS 6.8.0-147.147
  • linux Ubuntu 26.04 LTS 7.0.0-31.31
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1117.124
  • linux-aws Ubuntu 24.04 LTS 6.8.0-1067.70
  • linux-aws Ubuntu 26.04 LTS 7.0.0-1012.12
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1118.128
  • linux-gcp Ubuntu 24.04 LTS 6.8.0-1071.79

ubuntu advisories UBUNTU-CVE-2026-64600

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 enterprise linux nvidia 10 6.12.0-231.17.el10nv
  • rv enterprise linux nvidia 10 6.12.0-231.17.el10nv
  • perf enterprise linux nvidia 10 6.12.0-231.17.el10nv
  • rtla enterprise linux nvidia 10 6.12.0-231.17.el10nv
  • kernel-64k enterprise linux nvidia 10 6.12.0-231.17.el10nv
  • kernel-core enterprise linux nvidia 10 6.12.0-231.17.el10nv
  • kernel-tools enterprise linux nvidia 10 6.12.0-231.17.el10nv
  • python3-perf enterprise linux nvidia 10 6.12.0-231.17.el10nv

red hat advisories RHBA-2026:39321RHSA-2026:48016RHSA-2026:47997RHSA-2026:47998RHSA-2026:47983RHSA-2026:47984

  • kernel-default SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Live Patching 15 SP6 +1 more 6.4.0-150600.23.130.1
  • kernel-64kb SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS, SLE High Performance Computing 15 SP5-ESPOS 5.14.21-150500.55.182.1
  • kernel-syms SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS +1 more 5.14.21-150500.55.182.1
  • kernel-source SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +2 more 5.14.21-150500.55.182.1
  • kernel-default SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +3 more 5.14.21-150500.55.182.1
  • kernel-obs-build SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE High Performance Computing 15 SP5-LTSS +1 more 5.14.21-150500.55.182.1
  • kernel-default-base SLES for SAP 15 SP5, SLES 15 SP5-LTSS, SLE Micro 5.5 +2 more 5.14.21-150500.55.182.1.150500.6.85.2
  • kernel-livepatch-MICRO-6-0_Update_21 Linux Micro 6.1, Linux Micro 6.0 5-1.1

suse advisories SUSE-SU-2026:3602-1SUSE-SU-2026:4172-1SUSE-SU-2026:3595-1SUSE-SU-2026:23483-1SUSE-SU-2026:23484-1SUSE-SU-2026:23485-1

  • kernel-rt openSUSE Leap 16.0 6.12.0-160000.37.1
  • dtb-aarch64 openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-64kb openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-syms openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-azure openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-obs-qa openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-source openSUSE Leap 16.0 6.12.0-160000.37.1
  • kernel-default openSUSE Leap 16.0 6.12.0-160000.37.1

opensuse advisories openSUSE-SU-2026:21555-1openSUSE-SU-2026:11476-1

  • kernel AlmaLinux 8 4.18.0-553.144.1.el8_10
  • perf AlmaLinux 8 4.18.0-553.144.1.el8_10
  • bpftool AlmaLinux 8 4.18.0-553.144.1.el8_10
  • kernel-core AlmaLinux 8 4.18.0-553.144.1.el8_10
  • kernel-tools AlmaLinux 8 4.18.0-553.144.1.el8_10
  • python3-perf AlmaLinux 8 4.18.0-553.144.1.el8_10
  • kernel-modules AlmaLinux 8 4.18.0-553.144.1.el8_10
  • kernel-zfcpdump AlmaLinux 8 4.18.0-553.144.1.el8_10

almalinux advisories ALSA-2026:39179ALSA-2026:39180ALSA-2026:39494

  • kernel Azure Linux 3.0 6.6.145.2-1

azure linux advisories AZL-93050

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

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-2026-64600 updated cvss 7.8

kernel: XFS data corruption using reflink

  • Red Hat NVIDIA for RHEL 10 rv 6.12.0-231.17.el10nv, perf 6.12.0-231.17.el10nv, rtla 6.12.0-231.17.el10nv, kernel 6.12.0-231.17.el10nv, kernel-64k 6.12.0-231.17.el10nv, kernel-core 6.12.0-231.17.el10nv, +25 more
    fixed: vendor fix RHBA-2026:39321
  • Red Hat CodeReady Linux Builder EUS (v.9.6) libperf 5.14.0-570.128.1.el9_6, kernel-debuginfo-common-s390x 5.14.0-570.128.1.el9_6, kernel-debuginfo-common-x86_64 5.14.0-570.128.1.el9_6, kernel-debuginfo-common-aarch64 5.14.0-570.128.1.el9_6, kernel-debuginfo-common-ppc64le 5.14.0-570.128.1.el9_6
    fixed: vendor fix RHSA-2026:40425
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-687.26.1.el9_8, perf 5.14.0-687.26.1.el9_8, rtla 5.14.0-687.26.1.el9_8, python3-perf 5.14.0-687.26.1.el9_8, kernel-devel-matched 5.14.0-687.26.1.el9_8, kernel-64k-devel-matched 5.14.0-687.26.1.el9_8, +7 more
    fixed: vendor fix RHBA-2026:39332
  • Red Hat Enterprise Linux AppStream (v. 10) rv 6.12.0-211.34.1.el10_2, perf 6.12.0-211.34.1.el10_2, rtla 6.12.0-211.34.1.el10_2, python3-perf 6.12.0-211.34.1.el10_2, kernel-devel-matched 6.12.0-211.34.1.el10_2, kernel-64k-devel-matched 6.12.0-211.34.1.el10_2, +7 more
    fixed: vendor fix RHSA-2026:39494
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.182.1.el9_2, rtla 5.14.0-284.182.1.el9_2, kernel-devel-matched 5.14.0-284.182.1.el9_2, kernel-64k-devel-matched 5.14.0-284.182.1.el9_2, kernel-debug-devel-matched 5.14.0-284.182.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.182.1.el9_2, +5 more
    fixed: vendor fix RHBA-2026:41013
  • Red Hat Enterprise Linux AppStream E4S (v.9.4) rv 5.14.0-427.138.1.el9_4, perf 5.14.0-427.138.1.el9_4, rtla 5.14.0-427.138.1.el9_4, kernel-devel-matched 5.14.0-427.138.1.el9_4, kernel-64k-devel-matched 5.14.0-427.138.1.el9_4, kernel-debug-devel-matched 5.14.0-427.138.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:41063
  • Red Hat Enterprise Linux AppStream EUS (v. 10.0) rv 6.12.0-55.89.1.el10_0, perf 6.12.0-55.89.1.el10_0, rtla 6.12.0-55.89.1.el10_0, python3-perf 6.12.0-55.89.1.el10_0, kernel-devel-matched 6.12.0-55.89.1.el10_0, kernel-64k-devel-matched 6.12.0-55.89.1.el10_0, +7 more
    fixed: vendor fix RHSA-2026:41062
  • Red Hat Enterprise Linux AppStream EUS (v.9.6) rv 5.14.0-570.128.1.el9_6, perf 5.14.0-570.128.1.el9_6, rtla 5.14.0-570.128.1.el9_6, python3-perf 5.14.0-570.128.1.el9_6, kernel-devel-matched 5.14.0-570.128.1.el9_6, kernel-64k-devel-matched 5.14.0-570.128.1.el9_6, +7 more
    fixed: vendor fix RHSA-2026:40425
show 32 more
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.144.1.el8_10, kernel 4.18.0-553.144.1.el8_10, bpftool 4.18.0-553.144.1.el8_10, kernel-core 4.18.0-553.144.1.el8_10, kernel-tools 4.18.0-553.144.1.el8_10, python3-perf 4.18.0-553.144.1.el8_10, +20 more
    fixed: vendor fix RHSA-2026:39179
  • Red Hat Enterprise Linux BaseOS (v. 9) kernel 5.14.0-687.26.1.el9_8, kernel-64k 5.14.0-687.26.1.el9_8, kernel-core 5.14.0-687.26.1.el9_8, kernel-tools 5.14.0-687.26.1.el9_8, kernel-modules 5.14.0-687.26.1.el9_8, kernel-64k-core 5.14.0-687.26.1.el9_8, +28 more
    fixed: vendor fix RHBA-2026:39332
  • Red Hat Enterprise Linux BaseOS (v. 10) kernel 6.12.0-211.34.1.el10_2, kernel-64k 6.12.0-211.34.1.el10_2, kernel-core 6.12.0-211.34.1.el10_2, kernel-tools 6.12.0-211.34.1.el10_2, kernel-modules 6.12.0-211.34.1.el10_2, kernel-64k-core 6.12.0-211.34.1.el10_2, +29 more
    fixed: vendor fix RHSA-2026:39494
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.198.1.el8_4, kernel 4.18.0-305.198.1.el8_4, bpftool 4.18.0-305.198.1.el8_4, kernel-core 4.18.0-305.198.1.el8_4, kernel-tools 4.18.0-305.198.1.el8_4, python3-perf 4.18.0-305.198.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:39984
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.202.1.el8_6, kernel 4.18.0-372.202.1.el8_6, bpftool 4.18.0-372.202.1.el8_6, kernel-core 4.18.0-372.202.1.el8_6, kernel-tools 4.18.0-372.202.1.el8_6, python3-perf 4.18.0-372.202.1.el8_6, +8 more
    fixed: vendor fix RHBA-2026:41254
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.154.1.el8_8, kernel 4.18.0-477.154.1.el8_8, bpftool 4.18.0-477.154.1.el8_8, kernel-core 4.18.0-477.154.1.el8_8, kernel-tools 4.18.0-477.154.1.el8_8, python3-perf 4.18.0-477.154.1.el8_8, +14 more
    fixed: vendor fix RHSA-2026:41229
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.182.1.el9_2, kernel 5.14.0-284.182.1.el9_2, kernel-64k 5.14.0-284.182.1.el9_2, kernel-core 5.14.0-284.182.1.el9_2, kernel-tools 5.14.0-284.182.1.el9_2, python3-perf 5.14.0-284.182.1.el9_2, +33 more
    fixed: vendor fix RHBA-2026:41013
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool 7.3.0-427.138.1.el9_4, kernel 5.14.0-427.138.1.el9_4, kernel-64k 5.14.0-427.138.1.el9_4, kernel-core 5.14.0-427.138.1.el9_4, kernel-tools 5.14.0-427.138.1.el9_4, python3-perf 5.14.0-427.138.1.el9_4, +33 more
    fixed: vendor fix RHSA-2026:41063
  • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel 6.12.0-55.89.1.el10_0, kernel-64k 6.12.0-55.89.1.el10_0, kernel-core 6.12.0-55.89.1.el10_0, kernel-tools 6.12.0-55.89.1.el10_0, kernel-modules 6.12.0-55.89.1.el10_0, kernel-64k-core 6.12.0-55.89.1.el10_0, +27 more
    fixed: vendor fix RHSA-2026:41062
  • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel 5.14.0-570.128.1.el9_6, kernel-64k 5.14.0-570.128.1.el9_6, kernel-core 5.14.0-570.128.1.el9_6, kernel-tools 5.14.0-570.128.1.el9_6, kernel-modules 5.14.0-570.128.1.el9_6, kernel-64k-core 5.14.0-570.128.1.el9_6, +32 more
    fixed: vendor fix RHSA-2026:40425
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.198.1.el8_4, kernel 4.18.0-305.198.1.el8_4, bpftool 4.18.0-305.198.1.el8_4, kernel-core 4.18.0-305.198.1.el8_4, kernel-tools 4.18.0-305.198.1.el8_4, python3-perf 4.18.0-305.198.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:39984
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) perf 4.18.0-372.202.1.el8_6, kernel 4.18.0-372.202.1.el8_6, bpftool 4.18.0-372.202.1.el8_6, kernel-core 4.18.0-372.202.1.el8_6, kernel-tools 4.18.0-372.202.1.el8_6, python3-perf 4.18.0-372.202.1.el8_6, +8 more
    fixed: vendor fix RHBA-2026:41254
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.154.1.el8_8, kernel 4.18.0-477.154.1.el8_8, bpftool 4.18.0-477.154.1.el8_8, kernel-core 4.18.0-477.154.1.el8_8, kernel-tools 4.18.0-477.154.1.el8_8, python3-perf 4.18.0-477.154.1.el8_8, +8 more
    fixed: vendor fix RHSA-2026:41229
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) libperf 5.14.0-687.26.1.el9_8, kernel-debuginfo-common-s390x 5.14.0-687.26.1.el9_8, kernel-debuginfo-common-x86_64 5.14.0-687.26.1.el9_8, kernel-debuginfo-common-aarch64 5.14.0-687.26.1.el9_8, kernel-debuginfo-common-ppc64le 5.14.0-687.26.1.el9_8
    fixed: vendor fix RHBA-2026:39332
  • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) libperf 6.12.0-211.34.1.el10_2, kernel-debuginfo-common-s390x 6.12.0-211.34.1.el10_2, kernel-debuginfo-common-x86_64 6.12.0-211.34.1.el10_2, kernel-debuginfo-common-aarch64 6.12.0-211.34.1.el10_2, kernel-debuginfo-common-ppc64le 6.12.0-211.34.1.el10_2
    fixed: vendor fix RHSA-2026:39494
  • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) libperf 6.12.0-55.89.1.el10_0, kernel-debuginfo-common-s390x 6.12.0-55.89.1.el10_0, kernel-debuginfo-common-x86_64 6.12.0-55.89.1.el10_0, kernel-debuginfo-common-aarch64 6.12.0-55.89.1.el10_0, kernel-debuginfo-common-ppc64le 6.12.0-55.89.1.el10_0
    fixed: vendor fix RHSA-2026:41062
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.144.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.144.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.144.1.el8_10
    fixed: vendor fix RHSA-2026:39179
  • Red Hat Enterprise Linux NFV (v. 8) kernel-rt 4.18.0-553.144.1.rt7.485.el8_10, kernel-rt-kvm 4.18.0-553.144.1.rt7.485.el8_10, kernel-rt-core 4.18.0-553.144.1.rt7.485.el8_10, kernel-rt-modules 4.18.0-553.144.1.rt7.485.el8_10, kernel-rt-debug-kvm 4.18.0-553.144.1.rt7.485.el8_10, kernel-rt-debug-core 4.18.0-553.144.1.rt7.485.el8_10, +4 more
    fixed: vendor fix RHSA-2026:39180
  • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt 5.14.0-687.26.1.el9_8, kernel-rt-64k 5.14.0-687.26.1.el9_8, kernel-rt-core 5.14.0-687.26.1.el9_8, kernel-rt-modules 5.14.0-687.26.1.el9_8, kernel-rt-64k-core 5.14.0-687.26.1.el9_8, kernel-rt-debug-core 5.14.0-687.26.1.el9_8, +14 more
    fixed: vendor fix RHBA-2026:39332
  • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt 6.12.0-211.34.1.el10_2, kernel-rt-64k 6.12.0-211.34.1.el10_2, kernel-rt-core 6.12.0-211.34.1.el10_2, kernel-rt-modules 6.12.0-211.34.1.el10_2, kernel-rt-64k-core 6.12.0-211.34.1.el10_2, kernel-rt-debug-core 6.12.0-211.34.1.el10_2, +14 more
    fixed: vendor fix RHSA-2026:39494
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.182.1.rt14.467.el9_2, kernel-rt-core 5.14.0-284.182.1.rt14.467.el9_2, kernel-rt-modules 5.14.0-284.182.1.rt14.467.el9_2, kernel-rt-debug-core 5.14.0-284.182.1.rt14.467.el9_2, kernel-rt-modules-core 5.14.0-284.182.1.rt14.467.el9_2, kernel-rt-debug-modules 5.14.0-284.182.1.rt14.467.el9_2, +4 more
    fixed: vendor fix RHBA-2026:41065
  • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt 5.14.0-427.138.1.el9_4, kernel-rt-core 5.14.0-427.138.1.el9_4, kernel-rt-modules 5.14.0-427.138.1.el9_4, kernel-rt-debug-core 5.14.0-427.138.1.el9_4, kernel-rt-modules-core 5.14.0-427.138.1.el9_4, kernel-rt-debug-modules 5.14.0-427.138.1.el9_4, +4 more
    fixed: vendor fix RHSA-2026:41063
  • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt 6.12.0-55.89.1.el10_0, kernel-rt-64k 6.12.0-55.89.1.el10_0, kernel-rt-core 6.12.0-55.89.1.el10_0, kernel-rt-modules 6.12.0-55.89.1.el10_0, kernel-rt-64k-core 6.12.0-55.89.1.el10_0, kernel-rt-debug-core 6.12.0-55.89.1.el10_0, +14 more
    fixed: vendor fix RHSA-2026:41062
  • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt 5.14.0-570.128.1.el9_6, kernel-rt-64k 5.14.0-570.128.1.el9_6, kernel-rt-core 5.14.0-570.128.1.el9_6, kernel-rt-modules 5.14.0-570.128.1.el9_6, kernel-rt-64k-core 5.14.0-570.128.1.el9_6, kernel-rt-debug-core 5.14.0-570.128.1.el9_6, +14 more
    fixed: vendor fix RHSA-2026:40425
  • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt 5.14.0-687.26.1.el9_8, kernel-rt-core 5.14.0-687.26.1.el9_8, kernel-rt-modules 5.14.0-687.26.1.el9_8, kernel-rt-debug-core 5.14.0-687.26.1.el9_8, kernel-rt-modules-core 5.14.0-687.26.1.el9_8, kernel-rt-debug-modules 5.14.0-687.26.1.el9_8, +4 more
    fixed: vendor fix RHBA-2026:39332
  • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt 6.12.0-211.34.1.el10_2, kernel-rt-core 6.12.0-211.34.1.el10_2, kernel-rt-modules 6.12.0-211.34.1.el10_2, kernel-rt-debug-core 6.12.0-211.34.1.el10_2, kernel-rt-modules-core 6.12.0-211.34.1.el10_2, kernel-rt-debug-modules 6.12.0-211.34.1.el10_2, +4 more
    fixed: vendor fix RHSA-2026:39494
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.182.1.rt14.467.el9_2, kernel-rt-kvm 5.14.0-284.182.1.rt14.467.el9_2, kernel-rt-core 5.14.0-284.182.1.rt14.467.el9_2, kernel-rt-modules 5.14.0-284.182.1.rt14.467.el9_2, kernel-rt-debug-kvm 5.14.0-284.182.1.rt14.467.el9_2, kernel-rt-debug-core 5.14.0-284.182.1.rt14.467.el9_2, +6 more
    fixed: vendor fix RHBA-2026:41065
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt 5.14.0-427.138.1.el9_4, kernel-rt-kvm 5.14.0-427.138.1.el9_4, kernel-rt-core 5.14.0-427.138.1.el9_4, kernel-rt-modules 5.14.0-427.138.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.138.1.el9_4, kernel-rt-debug-core 5.14.0-427.138.1.el9_4, +6 more
    fixed: vendor fix RHSA-2026:41063
  • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt 6.12.0-55.89.1.el10_0, kernel-rt-kvm 6.12.0-55.89.1.el10_0, kernel-rt-core 6.12.0-55.89.1.el10_0, kernel-rt-modules 6.12.0-55.89.1.el10_0, kernel-rt-debug-kvm 6.12.0-55.89.1.el10_0, kernel-rt-debug-core 6.12.0-55.89.1.el10_0, +6 more
    fixed: vendor fix RHSA-2026:41062
  • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt 5.14.0-570.128.1.el9_6, kernel-rt-kvm 5.14.0-570.128.1.el9_6, kernel-rt-core 5.14.0-570.128.1.el9_6, kernel-rt-modules 5.14.0-570.128.1.el9_6, kernel-rt-debug-kvm 5.14.0-570.128.1.el9_6, kernel-rt-debug-core 5.14.0-570.128.1.el9_6, +6 more
    fixed: vendor fix RHSA-2026:40425
  • Red Hat Enterprise Linux RT (v. 8) kernel-rt 4.18.0-553.144.1.rt7.485.el8_10, kernel-rt-core 4.18.0-553.144.1.rt7.485.el8_10, kernel-rt-modules 4.18.0-553.144.1.rt7.485.el8_10, kernel-rt-debug-core 4.18.0-553.144.1.rt7.485.el8_10, kernel-rt-debug-modules 4.18.0-553.144.1.rt7.485.el8_10, kernel-rt-modules-extra 4.18.0-553.144.1.rt7.485.el8_10, +2 more
    fixed: vendor fix RHSA-2026:39180
  • Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more
    not affected: vulnerable code not present

1 more not affected in the full advisory

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
no
Technical impact
total
Assessed
23 d ago

Exploit prediction

0.47% chance of exploitation in the next 30 days, higher than 40% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • cdn2.qualys.com https://cdn2.qualys.com/advisory/2026/07/22/RefluXFS.txt referenced PoC, tagged "exploit" by a source, unverified
  • openwall.com http://www.openwall.com/lists/oss-security/2026/07/22/14 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/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 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.