VulnerabilityPublished 26 Jun 2026Updated 6 Nov 2026

CVE-2026-53295: Linux kernel · mailbox: add sanity check for channel array

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in d44872a569b8fbacde457ff2587a775e5004bb79 : update Linux kernel when convenient.

Data as of 6 Nov 2026, 17:04 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 d44872a569b8fbacde457ff2587a775e5004bb79, c1aad75595fb67edc7fda8af249d3b886efa1be9, 37792091ab28ba030fd8d61184c47d4d51294170 +5

Exploitation evidence

Disclosed: evidence found.
CVE published 26 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 ≥ 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c, < d44872a569b8fbacde457ff2587a775e5004bb79	Fixed in d44872a569b8fbacde457ff2587a775e5004bb79
LinuxLinux	Affected ≥ 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c, < c1aad75595fb67edc7fda8af249d3b886efa1be9	Fixed in c1aad75595fb67edc7fda8af249d3b886efa1be9
LinuxLinux	Affected ≥ 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c, < 37792091ab28ba030fd8d61184c47d4d51294170	Fixed in 37792091ab28ba030fd8d61184c47d4d51294170
LinuxLinux	Affected ≥ 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c, < 6362c4a7d7e21e68cd9aa04df7cde16befba3a4b	Fixed in 6362c4a7d7e21e68cd9aa04df7cde16befba3a4b
LinuxLinux	Affected ≥ 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c, < 14aed0d4e58389cc6a88acf8610b12d3e476272b	Fixed in 14aed0d4e58389cc6a88acf8610b12d3e476272b
LinuxLinux	Affected ≥ 2b6d83e2b8b7de82331a6a1dcd64b51020a6031c, < 9dd7489943324298bb0f385495795a82f1dd6507	Fixed in 9dd7489943324298bb0f385495795a82f1dd6507

Description

In the Linux kernel, the following vulnerability has been resolved: mailbox: add sanity check for channel array Fail gracefully if there is no channel array attached to the mailbox controller. Otherwise the later dereference will cause an OOPS which might not be seen because mailbox controllers might instantiate very early. Remove the comment explaining the obvious while here.

References

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