VulnerabilityPublished 24 Jun 2026Updated 6 Nov 2026

CVE-2026-52962: Linux kernel · ceph: fix a buffer leak in __ceph_setxattr()

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in ecf94823c5c6a20790bb76ed2816822b0beb0c22 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:49 UTC

Severity

Unrated

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

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-06.

Patch

Available – fixed in ecf94823c5c6a20790bb76ed2816822b0beb0c22, d0cb994605c84a159c1d00d72cdc8583c321ef95, bc7abce4460e490dcb579eec770f175b150b685f +10

Exploitation evidence

Disclosed: evidence found.
CVE published 24 Jun 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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 6 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected >=4.4.192 <4.5 >=4.9.192 <4.10 >=4.14.143 <4.15 >=4.19.72 <4.20 >=5.2.14 <5.3	Fixed in ecf94823c5c6a20790bb76ed2816822b0beb0c22 d0cb994605c84a159c1d00d72cdc8583c321ef95 bc7abce4460e490dcb579eec770f175b150b685f 521e5aba857fd267624892c8dd6295f22ce0267e 7d3e8d2d648d5f0df29b4710246680f47695fe94 5d3cc36b4e77a27ce7b686b7c59c7072bcb3fa8e 5.3 4bfdcefdaa6092a06cacd59389c7756b36e6de8c 4.20 4.15 4.10 4.5 3fa13ceefbc5f36131110342743994cb3de80637
LinuxLinux	Affected =5.3	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: ceph: fix a buffer leak in __ceph_setxattr() The old_blob in __ceph_setxattr() can store ci->i_xattrs.prealloc_blob value during the retry. However, it is never called the ceph_buffer_put() for the old_blob object. This patch fixes the issue of the buffer leak.

References

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