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Fencer Vulns
no cvss —

CVE-2022-50856 json

cifs: Fix xid leak in cifs_ses_add_channel()

published 2025-12-30 10 mo ago modified 2026-06-17 4 mo ago also EUVD-2022-55842

cvss
—
not scored
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 9%
public exploits
0
none known

Summary

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

cifs: Fix xid leak in cifs_ses_add_channel()

Before return, should free the xid, otherwise, the xid will be leaked.

Patch / fix

  • Linux Linux 5.10.152, 5.15.76, 6.0.6, 6.1
  • linux Debian 14, Debian 13, Debian 12 6.0.6-1

debian advisories DEBIAN-CVE-2022-50856

  • linux Ubuntu 22.04 LTS 5.15.0-60.66
  • linux-aws Ubuntu 22.04 LTS 5.15.0-1030.34
  • linux-gcp Ubuntu 22.04 LTS 5.15.0-1029.36
  • linux-gke Ubuntu 22.04 LTS 5.15.0-1027.32
  • linux-ibm Ubuntu 22.04 LTS 5.15.0-1025.28
  • linux-kvm Ubuntu 22.04 LTS 5.15.0-1028.33
  • linux-azure Ubuntu 22.04 LTS 5.15.0-1033.40
  • linux-gkeop Ubuntu 22.04 LTS 5.15.0-1015.19

ubuntu advisories UBUNTU-CVE-2022-50856

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-2025:19447RHSA-2023:6583

  • 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-2026:0411-1SUSE-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-2022-50856 updated cvss 3.3

kernel: cifs: Fix xid leak in cifs_ses_add_channel()

  • 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 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 rv, perf, rtla, kernel, bpftool, libperf, +83 more
    affected: no fix available “Fix deferred”
  • 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 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 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +8 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

0.20% chance of exploitation in the next 30 days, higher than 9% of all scored CVEs (FIRST EPSS, 2026-11-08).

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.