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VulnerabilityPublished Updated

CVE-2026-43419: Linux kernel · ceph: fix memory leaks in ceph_mdsc_build_path()

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in d39366c169f873edc8ad21fdf6bf08d1de603dbb : update Linux kernel when convenient.

Data as of 30 Oct 2026, 12:48 UTC

Severity
Low

Rated Low by Threat Radar's AI analysis · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none
Patch
Available – fixed in d39366c169f873edc8ad21fdf6bf08d1de603dbb, 5895d0164c84d7fec6abc198920c257f55c51899, 657dc653b06a3cc0282aea447a3f137fa94066a4 +6

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 8 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: 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 30 Oct 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • >=6.1.125 <6.1.191
  • >=5.10.234 <5.11
  • >=5.15.177 <5.16
Fixed in
  • d39366c169f873edc8ad21fdf6bf08d1de603dbb
  • 5895d0164c84d7fec6abc198920c257f55c51899
  • 657dc653b06a3cc0282aea447a3f137fa94066a4
  • 097cd68f46686391a98f2618188f0cb7b7570de2
  • 040d159a45ded7f33201421a81df0aa2a86e5a0b
  • 13b8b9d6f59ef17fb96c298c3a0d62a8306950cc
  • 6.1.191
  • 5.16
  • 5.11
LinuxLinuxAffected
  • =6.6
Fixed in–

AI-suggested

This issue has been fixed in Linux kernel versions 6.1.191, 5.16, and 5.11, among others. Users and administrators should update to these or later versions to remediate the memory leak. No additional mitigation is required beyond applying the official patches.

Description

A memory leak vulnerability in the Linux kernel's Ceph component was fixed by ensuring proper freeing of the "path" pointer in ceph_mdsc_build_path(). This issue occurred when error paths did not release memory allocated by __getname(), potentially causing resource exhaustion.

References

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