Skip to main content
VulnerabilityPublished Updated

CVE-2025-68219: Linux kernel · cifs: fix memory leak in smb3_fs_context_parse_param error path

Affects Linux kernelSource GCVE Database

0

Not known to be exploited · fixed in 6.8.0-1050.53~22.04.1 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 11:42 UTC

Severity
Medium

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS
0.1% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 6.8.0-1050.53~22.04.1, 6.8.0-1051.57~22.04.1, 6.8.0-1052.55~22.04.1 +40

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 16 Dec 2025

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
Ubuntu 25.10linuxpkg:deb/ubuntu/linux@6.17.0-19.19?arch=source&distro=questingOther threatsAffected
  • <6.17.0-19.19
Fixed in
  • 6.17.0-19.19
Ubuntu 25.10linux-awspkg:deb/ubuntu/linux-aws@6.17.0-1009.9?arch=source&distro=questingOther threatsAffected
  • <6.17.0-1009.9
Fixed in
  • 6.17.0-1009.9
Ubuntu 25.10linux-azurepkg:deb/ubuntu/linux-azure@6.17.0-1010.10?arch=source&distro=questingOther threatsAffected
  • <6.17.0-1010.10
Fixed in
  • 6.17.0-1010.10
Ubuntu 25.10linux-azure-fdepkg:deb/ubuntu/linux-azure-fde@6.17.0-1017.17?arch=source&distro=questingOther threatsAffected
  • 6.17.0-1003.3 – 6.17.0-1017.17
10 affected builds
Fixed in–
Ubuntu 25.10linux-gcppkg:deb/ubuntu/linux-gcp@6.17.0-1009.9?arch=source&distro=questingOther threatsAffected
  • <6.17.0-1009.9
Fixed in
  • 6.17.0-1009.9
Ubuntu 25.10linux-oraclepkg:deb/ubuntu/linux-oracle@6.17.0-1009.9?arch=source&distro=questingOther threatsAffected
  • <6.17.0-1009.9
Fixed in
  • 6.17.0-1009.9

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A patch is available and should be applied to affected linux-hwe-edge kernel versions. The vendor advisory confirms the issue is fixed in updated kernel releases. Users should update to the fixed kernel versions to remediate this memory leak vulnerability.

Description

A memory leak vulnerability in the Linux kernel's CIFS module was fixed. The issue occurred in the smb3_fs_context_parse_param error path where allocated memory for source strings was not properly freed, leading to a leak. This was addressed by adding proper cleanup and nullifying pointers to prevent double-free. The vulnerability was detected by syzbot and affects specific linux-hwe-edge kernel versions prior to 6.8.0-1049.49 through 6.8.0-1052.55~22.04.1. A patch is available to resolve this issue.

References

Community reviews

Loading reviews…