Skip to content
Fencer Vulns
critical 9.8

CVE-2023-53751 in the critical feed json

cifs: fix potential use-after-free bugs in TCP_Server_Info::hostname

published 2025-12-08 11 mo ago modified 2026-08-05 3 mo ago also EUVD-2023-60077

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 38%
public exploits
0
none known

Summary

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

cifs: fix potential use-after-free bugs in TCP_Server_Info::hostname

TCP_Server_Info::hostname may be updated once or many times during reconnect, so protect its access outside reconnect path as well and then prevent any potential use-after-free bugs.

Patch / fix

  • Linux Linux 6.1.28, 6.2.15, 6.3.2, 6.4
  • linux Debian 12 6.1.37-1
  • linux Debian 14, Debian 13 6.3.7-1

debian advisories DEBIAN-CVE-2023-53751

  • linux-azure Ubuntu 22.04 LTS 5.15.0-1051.59
  • linux-azure-fde Ubuntu 22.04 LTS 5.15.0-1051.59.1
  • linux-azure-5.15 Ubuntu 20.04 LTS 5.15.0-1051.59~20.04.1

ubuntu advisories UBUNTU-CVE-2023-53751

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 8 4.18.0-553.82.1.el8_10
  • perf RHEL 8 4.18.0-553.82.1.el8_10
  • bpftool RHEL 8 4.18.0-553.82.1.el8_10
  • kernel-core RHEL 8 4.18.0-553.82.1.el8_10
  • kernel-tools RHEL 8 4.18.0-553.82.1.el8_10
  • python3-perf RHEL 8 4.18.0-553.82.1.el8_10
  • kernel-modules RHEL 8 4.18.0-553.82.1.el8_10
  • kernel-zfcpdump RHEL 8 4.18.0-553.82.1.el8_10

red hat advisories RHSA-2026:2577RHSA-2026:2573RHSA-2026:2535RHSA-2026:2490RHSA-2026:1946RHSA-2026:1909

  • kernel-64kb SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS, SLE High Performance Computing 15 SP4-ESPOS 5.14.21-150400.24.194.1
  • kernel-syms SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +1 more 5.14.21-150400.24.194.1
  • kernel-source SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +1 more 5.14.21-150400.24.194.1
  • kernel-default SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Micro 5.4 +5 more 5.14.21-150400.24.194.1
  • kernel-obs-build SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE High Performance Computing 15 SP4-LTSS +1 more 5.14.21-150400.24.194.1
  • kernel-default-base SLES for SAP 15 SP4, SLES 15 SP4-LTSS, SLE Micro 5.4 +3 more 5.14.21-150400.24.194.1.150400.24.98.3
  • kernel-rt SLE Micro 5.4, SLE Micro 5.3 5.14.21-150400.15.142.1
  • kernel-source-rt SLE Micro 5.4, SLE Micro 5.3 5.14.21-150400.15.142.1

suse advisories SUSE-SU-2026:0617-1SUSE-SU-2026:0473-1SUSE-SU-2026:0411-1SUSE-SU-2026:0317-1SUSE-SU-2026:0263-1

  • kernel AlmaLinux 8 4.18.0-553.82.1.el8_10
  • perf AlmaLinux 8 4.18.0-553.82.1.el8_10
  • bpftool AlmaLinux 8 4.18.0-553.82.1.el8_10
  • kernel-core AlmaLinux 8 4.18.0-553.82.1.el8_10
  • kernel-tools AlmaLinux 8 4.18.0-553.82.1.el8_10
  • python3-perf AlmaLinux 8 4.18.0-553.82.1.el8_10
  • kernel-modules AlmaLinux 8 4.18.0-553.82.1.el8_10
  • kernel-zfcpdump AlmaLinux 8 4.18.0-553.82.1.el8_10

almalinux advisories ALSA-2025:19447

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-2023-53751 updated cvss 7.1

kernel: Linux kernel (CIFS): Use-after-free vulnerability allows data integrity compromise and denial of service

  • Red Hat Enterprise Linux 7 kernel-rt, kernel-rt-kvm, kernel-rt-trace, kernel-rt-debug-kvm, kernel-rt-trace-kvm Red Hat Enterprise Linux 8 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +6 more Red Hat Enterprise Linux 9 kernel-rt, kernel-rt-kvm, kernel-rt-core, kernel-rt-modules, kernel-rt-debug-kvm, kernel-rt-debug-core, +12 more
    affected: workaround, no fix available
  • Red Hat Enterprise Linux AppStream (v. 9) rv 5.14.0-427.13.1.el9_4, perf 5.14.0-427.13.1.el9_4, rtla 5.14.0-427.13.1.el9_4, kernel-devel-matched 5.14.0-427.13.1.el9_4, kernel-64k-devel-matched 5.14.0-427.13.1.el9_4, kernel-debug-devel-matched 5.14.0-427.13.1.el9_4, +6 more
    fixed: vendor fix RHSA-2024:2394
  • Red Hat Enterprise Linux AppStream E4S (v.9.0) perf 5.14.0-70.165.1.el9_0, kernel-devel-matched 5.14.0-70.165.1.el9_0, kernel-debug-devel-matched 5.14.0-70.165.1.el9_0, kernel-debuginfo-common-s390x 5.14.0-70.165.1.el9_0, kernel-zfcpdump-devel-matched 5.14.0-70.165.1.el9_0, kernel-debuginfo-common-x86_64 5.14.0-70.165.1.el9_0, +2 more
    fixed: vendor fix RHSA-2026:2573
  • Red Hat Enterprise Linux AppStream E4S (v.9.2) perf 5.14.0-284.155.1.el9_2, rtla 5.14.0-284.155.1.el9_2, kernel-devel-matched 5.14.0-284.155.1.el9_2, kernel-64k-devel-matched 5.14.0-284.155.1.el9_2, kernel-debug-devel-matched 5.14.0-284.155.1.el9_2, kernel-debuginfo-common-s390x 5.14.0-284.155.1.el9_2, +5 more
    fixed: vendor fix RHSA-2026:1909
  • Red Hat Enterprise Linux BaseOS (v. 8) perf 4.18.0-553.82.1.el8_10, kernel 4.18.0-553.82.1.el8_10, bpftool 4.18.0-553.82.1.el8_10, kernel-core 4.18.0-553.82.1.el8_10, kernel-tools 4.18.0-553.82.1.el8_10, python3-perf 4.18.0-553.82.1.el8_10, +15 more
    fixed: vendor fix RHSA-2025:19447
  • Red Hat Enterprise Linux BaseOS (v. 9) bpftool 7.3.0-427.13.1.el9_4, kernel 5.14.0-427.13.1.el9_4, kernel-64k 5.14.0-427.13.1.el9_4, kernel-core 5.14.0-427.13.1.el9_4, kernel-tools 5.14.0-427.13.1.el9_4, python3-perf 5.14.0-427.13.1.el9_4, +28 more
    fixed: vendor fix RHSA-2024:2394
  • Red Hat Enterprise Linux BaseOS AUS (v. 8.2) perf 4.18.0-193.183.1.el8_2, kernel 4.18.0-193.183.1.el8_2, bpftool 4.18.0-193.183.1.el8_2, kernel-core 4.18.0-193.183.1.el8_2, kernel-tools 4.18.0-193.183.1.el8_2, python3-perf 4.18.0-193.183.1.el8_2, +8 more
    fixed: vendor fix RHSA-2026:1512
  • Red Hat Enterprise Linux BaseOS AUS (v.8.4) perf 4.18.0-305.184.1.el8_4, kernel 4.18.0-305.184.1.el8_4, bpftool 4.18.0-305.184.1.el8_4, kernel-core 4.18.0-305.184.1.el8_4, kernel-tools 4.18.0-305.184.1.el8_4, python3-perf 4.18.0-305.184.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:1886
show 13 more
  • Red Hat Enterprise Linux BaseOS AUS (v.8.6) perf 4.18.0-372.179.1.el8_6, kernel 4.18.0-372.179.1.el8_6, bpftool 4.18.0-372.179.1.el8_6, kernel-core 4.18.0-372.179.1.el8_6, kernel-tools 4.18.0-372.179.1.el8_6, python3-perf 4.18.0-372.179.1.el8_6, +8 more Red Hat Enterprise Linux BaseOS E4S (v.8.6) perf 4.18.0-372.179.1.el8_6, kernel 4.18.0-372.179.1.el8_6, bpftool 4.18.0-372.179.1.el8_6, kernel-core 4.18.0-372.179.1.el8_6, kernel-tools 4.18.0-372.179.1.el8_6, python3-perf 4.18.0-372.179.1.el8_6, +15 more
    fixed: vendor fix RHSA-2026:2490
  • Red Hat Enterprise Linux BaseOS E4S (v.8.8) perf 4.18.0-477.128.1.el8_8, kernel 4.18.0-477.128.1.el8_8, bpftool 4.18.0-477.128.1.el8_8, kernel-core 4.18.0-477.128.1.el8_8, kernel-tools 4.18.0-477.128.1.el8_8, python3-perf 4.18.0-477.128.1.el8_8, +9 more
    fixed: vendor fix RHSA-2026:2535
  • Red Hat Enterprise Linux BaseOS E4S (v.9.0) kernel 5.14.0-70.165.1.el9_0, bpftool 5.14.0-70.165.1.el9_0, kernel-core 5.14.0-70.165.1.el9_0, kernel-tools 5.14.0-70.165.1.el9_0, python3-perf 5.14.0-70.165.1.el9_0, kernel-modules 5.14.0-70.165.1.el9_0, +14 more
    fixed: vendor fix RHSA-2026:2573
  • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool 7.0.0-284.155.1.el9_2, kernel 5.14.0-284.155.1.el9_2, kernel-64k 5.14.0-284.155.1.el9_2, kernel-core 5.14.0-284.155.1.el9_2, kernel-tools 5.14.0-284.155.1.el9_2, python3-perf 5.14.0-284.155.1.el9_2, +28 more
    fixed: vendor fix RHSA-2026:1909
  • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) perf 4.18.0-305.184.1.el8_4, kernel 4.18.0-305.184.1.el8_4, bpftool 4.18.0-305.184.1.el8_4, kernel-core 4.18.0-305.184.1.el8_4, kernel-tools 4.18.0-305.184.1.el8_4, python3-perf 4.18.0-305.184.1.el8_4, +8 more
    fixed: vendor fix RHSA-2026:1886
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6) perf 4.18.0-372.179.1.el8_6, kernel 4.18.0-372.179.1.el8_6, bpftool 4.18.0-372.179.1.el8_6, kernel-core 4.18.0-372.179.1.el8_6, kernel-tools 4.18.0-372.179.1.el8_6, python3-perf 4.18.0-372.179.1.el8_6, +8 more
    fixed: vendor fix RHSA-2026:2490
  • Red Hat Enterprise Linux BaseOS TUS (v.8.8) perf 4.18.0-477.128.1.el8_8, kernel 4.18.0-477.128.1.el8_8, bpftool 4.18.0-477.128.1.el8_8, kernel-core 4.18.0-477.128.1.el8_8, kernel-tools 4.18.0-477.128.1.el8_8, python3-perf 4.18.0-477.128.1.el8_8, +8 more
    fixed: vendor fix RHSA-2026:2535
  • Red Hat Enterprise Linux CRB (v. 8) kernel-debuginfo-common-x86_64 4.18.0-553.82.1.el8_10, kernel-debuginfo-common-aarch64 4.18.0-553.82.1.el8_10, kernel-debuginfo-common-ppc64le 4.18.0-553.82.1.el8_10
    fixed: vendor fix RHSA-2025:19447
  • Red Hat Enterprise Linux CRB (v. 9) libperf 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-s390x 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-x86_64 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-aarch64 5.14.0-427.13.1.el9_4, kernel-debuginfo-common-ppc64le 5.14.0-427.13.1.el9_4 Red Hat Enterprise Linux NFV (v. 9) kernel-rt 5.14.0-427.13.1.el9_4, kernel-rt-kvm 5.14.0-427.13.1.el9_4, kernel-rt-core 5.14.0-427.13.1.el9_4, kernel-rt-modules 5.14.0-427.13.1.el9_4, kernel-rt-debug-kvm 5.14.0-427.13.1.el9_4, kernel-rt-debug-core 5.14.0-427.13.1.el9_4, +6 more
    fixed: vendor fix RHSA-2024:2394
  • Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt 5.14.0-70.165.1.rt21.237.el9_0, kernel-rt-kvm 5.14.0-70.165.1.rt21.237.el9_0, kernel-rt-core 5.14.0-70.165.1.rt21.237.el9_0, kernel-rt-modules 5.14.0-70.165.1.rt21.237.el9_0, kernel-rt-debug-kvm 5.14.0-70.165.1.rt21.237.el9_0, kernel-rt-debug-core 5.14.0-70.165.1.rt21.237.el9_0, +4 more Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt 5.14.0-70.165.1.rt21.237.el9_0, kernel-rt-core 5.14.0-70.165.1.rt21.237.el9_0, kernel-rt-modules 5.14.0-70.165.1.rt21.237.el9_0, kernel-rt-debug-core 5.14.0-70.165.1.rt21.237.el9_0, kernel-rt-debug-modules 5.14.0-70.165.1.rt21.237.el9_0, kernel-rt-modules-extra 5.14.0-70.165.1.rt21.237.el9_0, +2 more
    fixed: vendor fix RHSA-2026:2577
  • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt 5.14.0-284.155.1.rt14.440.el9_2, kernel-rt-core 5.14.0-284.155.1.rt14.440.el9_2, kernel-rt-modules 5.14.0-284.155.1.rt14.440.el9_2, kernel-rt-debug-core 5.14.0-284.155.1.rt14.440.el9_2, kernel-rt-modules-core 5.14.0-284.155.1.rt14.440.el9_2, kernel-rt-debug-modules 5.14.0-284.155.1.rt14.440.el9_2, +4 more Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt 5.14.0-284.155.1.rt14.440.el9_2, kernel-rt-kvm 5.14.0-284.155.1.rt14.440.el9_2, kernel-rt-core 5.14.0-284.155.1.rt14.440.el9_2, kernel-rt-modules 5.14.0-284.155.1.rt14.440.el9_2, kernel-rt-debug-kvm 5.14.0-284.155.1.rt14.440.el9_2, kernel-rt-debug-core 5.14.0-284.155.1.rt14.440.el9_2, +6 more
    fixed: vendor fix RHSA-2026:1946
  • Red Hat Enterprise Linux RT (v. 9) kernel-rt 5.14.0-427.13.1.el9_4, kernel-rt-core 5.14.0-427.13.1.el9_4, kernel-rt-modules 5.14.0-427.13.1.el9_4, kernel-rt-debug-core 5.14.0-427.13.1.el9_4, kernel-rt-modules-core 5.14.0-427.13.1.el9_4, kernel-rt-debug-modules 5.14.0-427.13.1.el9_4, +4 more
    fixed: vendor fix RHSA-2024:2394
  • 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, python-perf, kernel-kdump, kernel-tools, +3 more Red Hat Enterprise Linux 10 kernel
    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

0.44% chance of exploitation in the next 30 days, higher than 38% of all scored CVEs (FIRST EPSS, 2026-11-08).

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

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.