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NVD / CVE Program· CNA Linux

CVE-2022-50856: cifs: Fix xid leak in cifs_ses_add_channel()

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.19% (FIRST EPSS).
  • Fixed version: Linux Linux 7286f875510486fdc2fc426b7c826262e2283a65, 847301f0ee1c29f34cc48547ce1071990f24969c, db2a8b6c17e128d91f35d836c569f4a6bda4471b.

Low priority for now. Upgrade to Linux Linux 7286f875510486fdc2fc426b7c826262e2283a65, 847301f0ee1c29f34cc48547ce1071990f24969c, db2a8b6c17e128d91f35d836c569f4a6bda4471b or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

—No exploit Fix available
Published
Dec 30, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 9th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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  • Not in KEV: no record of exploitation in the wild
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  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.5affected
    • d70e9fa55884760b6d6c293dbf20d8c52ce11fb7 and later · before 7286f875510486fdc2fc426b7c826262e2283a65affected · git
    • d70e9fa55884760b6d6c293dbf20d8c52ce11fb7 and later · before 847301f0ee1c29f34cc48547ce1071990f24969caffected · git
    • d70e9fa55884760b6d6c293dbf20d8c52ce11fb7 and later · before db2a8b6c17e128d91f35d836c569f4a6bda4471baffected · git
    • d70e9fa55884760b6d6c293dbf20d8c52ce11fb7 and later · before e909d054bdea75ef1ec48c18c5936affdaecbb2caffected · git
    • before 5.5not affected · semver
    • 5.10.152 and later · up to and including 5.10.*not affected · semver
    • 5.15.76 and later · up to and including 5.15.*not affected · semver
    • 6.0.6 and later · up to and including 6.0.*not affected · semver
    • 6.1 and laternot affected · original_commit_for_fix

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.0.6-16.0.6-1
Red Hat:enterprise_linux:8::baseosbpftoolbefore 0:4.18.0-553.82.1.el8_100:4.18.0-553.82.1.el8_10
Red Hat:enterprise_linux:8::baseosbpftool-debuginfobefore 0:4.18.0-553.82.1.el8_100:4.18.0-553.82.1.el8_10
Red Hat:enterprise_linux:8::baseoskernelbefore 0:4.18.0-553.82.1.el8_100:4.18.0-553.82.1.el8_10
Red Hat:enterprise_linux:8::baseoskernel-abi-stablelistsbefore 0:4.18.0-553.82.1.el8_100:4.18.0-553.82.1.el8_10
Red Hat:enterprise_linux:8::baseoskernel-corebefore 0:4.18.0-553.82.1.el8_100:4.18.0-553.82.1.el8_10
Red Hat:enterprise_linux:8::baseoskernel-debugbefore 0:4.18.0-553.82.1.el8_100:4.18.0-553.82.1.el8_10
Red Hat:enterprise_linux:8::baseoskernel-debug-corebefore 0:4.18.0-553.82.1.el8_100:4.18.0-553.82.1.el8_10
Red Hat:enterprise_linux:8::baseoskernel-debug-debuginfobefore 0:4.18.0-553.82.1.el8_100:4.18.0-553.82.1.el8_10
Red Hat:enterprise_linux:8::baseoskernel-debug-develbefore 0:4.18.0-553.82.1.el8_100:4.18.0-553.82.1.el8_10
Red Hat:enterprise_linux:8::baseoskernel-debug-modulesbefore 0:4.18.0-553.82.1.el8_100:4.18.0-553.82.1.el8_10
Red Hat:enterprise_linux:8::baseoskernel-debug-modules-extrabefore 0:4.18.0-553.82.1.el8_100:4.18.0-553.82.1.el8_10
Red Hat:enterprise_linux:8::baseoskernel-debuginfobefore 0:4.18.0-553.82.1.el8_100:4.18.0-553.82.1.el8_10
Red Hat:enterprise_linux:8::baseoskernel-debuginfo-common-aarch64before 0:4.18.0-553.82.1.el8_100:4.18.0-553.82.1.el8_10
Red Hat:enterprise_linux:8::baseoskernel-debuginfo-common-ppc64lebefore 0:4.18.0-553.82.1.el8_100:4.18.0-553.82.1.el8_10
Red Hat:enterprise_linux:8::baseoskernel-debuginfo-common-s390xbefore 0:4.18.0-553.82.1.el8_100:4.18.0-553.82.1.el8_10
Red Hat:enterprise_linux:8::baseoskernel-debuginfo-common-x86_64before 0:4.18.0-553.82.1.el8_100:4.18.0-553.82.1.el8_10
Red Hat:enterprise_linux:8::baseoskernel-develbefore 0:4.18.0-553.82.1.el8_100:4.18.0-553.82.1.el8_10
Red Hat:enterprise_linux:8::baseoskernel-docbefore 0:4.18.0-553.82.1.el8_100:4.18.0-553.82.1.el8_10
Red Hat:enterprise_linux:8::baseoskernel-modulesbefore 0:4.18.0-553.82.1.el8_100:4.18.0-553.82.1.el8_10
Red Hat:enterprise_linux:8::baseoskernel-modules-extrabefore 0:4.18.0-553.82.1.el8_100:4.18.0-553.82.1.el8_10
Red Hat:enterprise_linux:8::baseoskernel-toolsbefore 0:4.18.0-553.82.1.el8_100:4.18.0-553.82.1.el8_10
Red Hat:enterprise_linux:8::baseoskernel-tools-debuginfobefore 0:4.18.0-553.82.1.el8_100:4.18.0-553.82.1.el8_10
Red Hat:enterprise_linux:8::baseoskernel-tools-libsbefore 0:4.18.0-553.82.1.el8_100:4.18.0-553.82.1.el8_10

+11

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2022-50854Dec 30, 2025 · nfc: virtual_ncidev: Fix memory leak in virtual_nci_send()
    0Monitor
  • ← EarlierCVE-2022-50855Dec 30, 2025 · bpf: prevent leak of lsm program after failed attach
    0Monitor
  • Later →CVE-2022-50857Dec 30, 2025 · rapidio: rio: fix possible name leak in rio_register_mport()
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux7286f875510486fdc2fc426b7c826262e2283a65Vendor (CNA)
Linux Linux847301f0ee1c29f34cc48547ce1071990f24969cVendor (CNA)
Linux Linuxdb2a8b6c17e128d91f35d836c569f4a6bda4471bVendor (CNA)
Linux Linuxe909d054bdea75ef1ec48c18c5936affdaecbb2cVendor (CNA)
debian:linux6.0.6-1 · Debian:12Package registry (OSV)
red hat:bpftool0:4.18.0-553.82.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:bpftool-debuginfo0:4.18.0-553.82.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel0:4.18.0-553.82.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-abi-stablelists0:4.18.0-553.82.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-core0:4.18.0-553.82.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug0:4.18.0-553.82.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-core0:4.18.0-553.82.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-debuginfo0:4.18.0-553.82.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-devel0:4.18.0-553.82.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-modules0:4.18.0-553.82.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-modules-extra0:4.18.0-553.82.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debuginfo0:4.18.0-553.82.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records