VulnerabilityPublished 25 Jun 2026Updated 6 Nov 2026

CVE-2026-53213: Linux kernel · drm/vc4: fix krealloc() memory leak

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in fd87d6966041e33ef7d2e5dc59f9a52b71c6ae5f : update Linux kernel when convenient.

Data as of 6 Nov 2026, 16:34 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 fd87d6966041e33ef7d2e5dc59f9a52b71c6ae5f, e0ce103e89d61eef70edc1d1ae3bfd4c0aacbc2e, c034aa0b1ba5f49cbdf8ef193d6ec714d74aac27 +4

Exploitation evidence

Disclosed: evidence found.
CVE published 25 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 ≥ 6d45c81d229d71da54d374143e7d6abad4c0cf31, < fd87d6966041e33ef7d2e5dc59f9a52b71c6ae5f	Fixed in fd87d6966041e33ef7d2e5dc59f9a52b71c6ae5f
LinuxLinux	Affected ≥ 6d45c81d229d71da54d374143e7d6abad4c0cf31, < e0ce103e89d61eef70edc1d1ae3bfd4c0aacbc2e	Fixed in e0ce103e89d61eef70edc1d1ae3bfd4c0aacbc2e
LinuxLinux	Affected ≥ 6d45c81d229d71da54d374143e7d6abad4c0cf31, < c034aa0b1ba5f49cbdf8ef193d6ec714d74aac27	Fixed in c034aa0b1ba5f49cbdf8ef193d6ec714d74aac27
LinuxLinux	Affected ≥ 6d45c81d229d71da54d374143e7d6abad4c0cf31, < 30165a09f76eaf34951c818eb5d9d6e4771d76f6	Fixed in 30165a09f76eaf34951c818eb5d9d6e4771d76f6
LinuxLinux	Affected ≥ 6d45c81d229d71da54d374143e7d6abad4c0cf31, < 5d563a5da8717629ae72f9eadf1e0e340bd1658b	Fixed in 5d563a5da8717629ae72f9eadf1e0e340bd1658b
LinuxLinux	Affected ≥ 6d45c81d229d71da54d374143e7d6abad4c0cf31, < 4fc692dc6df5bc777cc1bcebf95179e28594875f	Fixed in 4fc692dc6df5bc777cc1bcebf95179e28594875f

Description

In the Linux kernel, the following vulnerability has been resolved: drm/vc4: fix krealloc() memory leak Don't just overwrite the original pointer passed to krealloc() with its return value without checking latter: MEM = krealloc(MEM, SZ, GFP); If krealloc() returns NULL, that erases the pointer to the still allocated memory, hence leaks this memory. Instead, use a temporary variable, check it's not NULL and only then assign it to the original pointer: TMP = krealloc(MEM, SZ, GFP); if (!TMP) return; MEM = TMP; While on it, use krealloc_array().

References

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