VulnerabilityPublished 23 Oct 2026

CVE-2026-98970: Linux kernel · drm/vc4: Free the BO cache size list on teardown

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in bf2848e50bd73782c2942ec023b5b60231f16e9b : update Linux kernel when convenient.

Data as of 26 Oct 2026, 17:16 UTC

Severity

Low

Rated Low by Threat Radar's AI analysis · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in bf2848e50bd73782c2942ec023b5b60231f16e9b, bea10b84e22efa22b005e8dba1a19df4e04a7649, b41ff8b529278216cba22a5dcdc93fea2a3a9619 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 23 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: 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 26 Oct 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.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, 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 ≥ c826a6e1064419f78855463cf29ce9e8b9d25bf4, < bf2848e50bd73782c2942ec023b5b60231f16e9b	Fixed in bf2848e50bd73782c2942ec023b5b60231f16e9b
LinuxLinux	Affected ≥ c826a6e1064419f78855463cf29ce9e8b9d25bf4, < bea10b84e22efa22b005e8dba1a19df4e04a7649	Fixed in bea10b84e22efa22b005e8dba1a19df4e04a7649
LinuxLinux	Affected ≥ c826a6e1064419f78855463cf29ce9e8b9d25bf4, < b41ff8b529278216cba22a5dcdc93fea2a3a9619	Fixed in b41ff8b529278216cba22a5dcdc93fea2a3a9619
LinuxLinux	Affected ≥ c826a6e1064419f78855463cf29ce9e8b9d25bf4, < 40870a0290cd913c9d94f98ed87ebe00dd091e53	Fixed in 40870a0290cd913c9d94f98ed87ebe00dd091e53
LinuxLinux	Affected ≥ c826a6e1064419f78855463cf29ce9e8b9d25bf4, < 035ad1bc964f6698e9b06c26ffe94bcac08dadea	Fixed in 035ad1bc964f6698e9b06c26ffe94bcac08dadea
LinuxLinux	Affected =4.5	Fixed in–

AI-suggested

A fix for this vulnerability is available in the Linux kernel commits identified by the fixedVersions hashes. Users should update their Linux kernel to a version including these fixes to remediate the memory leak.

Description

A memory leak vulnerability in the Linux kernel's drm/vc4 driver was fixed by ensuring the BO cache size list is freed on teardown. The function vc4_bo_cache_destroy() previously purged cached buffer objects but did not free the associated size list, causing a memory leak each time an unbind occurred.

Impact

The vulnerability causes a memory leak in the kernel's graphics driver, which could lead to increased memory consumption over time. There is no indication of direct security impact such as privilege escalation or denial of service beyond resource exhaustion from the leak. No known exploits in the wild have been reported.

Summary

CVE-2026-98970 addresses a memory leak in the Linux kernel's drm/vc4 driver. Specifically, the function vc4_bo_cache_destroy() failed to free the BO cache size list during teardown, resulting in a leak of this list on every unbind operation. This issue was resolved by adding code to free the size list properly, preventing the leak.

References

Community reviews

Loading reviews…

Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 26 Oct 2026, 09:54 UTC

Technical details

References

Community reviews

Related threats