VulnerabilityPublished 24 Jun 2026Updated 6 Nov 2026

CVE-2026-52964: Linux kernel · ALSA: usb-audio: Bound MIDI 2.0 endpoint descriptor scans

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in fafc97bd01e4c737eaeafadfdadb1af4bbfa7307 : 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 fafc97bd01e4c737eaeafadfdadb1af4bbfa7307, f9c184a83574549a36ea69b755f650e57d164c78, a310b4bebda5e4a1b26520c0cc5145ccd6d617e2 +2

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 ≥ ff49d1df79aef7580fe3ac99d17c3f886655d080, < fafc97bd01e4c737eaeafadfdadb1af4bbfa7307	Fixed in fafc97bd01e4c737eaeafadfdadb1af4bbfa7307
LinuxLinux	Affected ≥ ff49d1df79aef7580fe3ac99d17c3f886655d080, < f9c184a83574549a36ea69b755f650e57d164c78	Fixed in f9c184a83574549a36ea69b755f650e57d164c78
LinuxLinux	Affected ≥ ff49d1df79aef7580fe3ac99d17c3f886655d080, < a310b4bebda5e4a1b26520c0cc5145ccd6d617e2	Fixed in a310b4bebda5e4a1b26520c0cc5145ccd6d617e2
LinuxLinux	Affected ≥ ff49d1df79aef7580fe3ac99d17c3f886655d080, < 918be519c7876329e1b6e2ea1c59f0b75e792dca	Fixed in 918be519c7876329e1b6e2ea1c59f0b75e792dca
LinuxLinux	Affected ≥ ff49d1df79aef7580fe3ac99d17c3f886655d080, < 17e76b19de1aff5ff4de64d269290bd1b07a01d3	Fixed in 17e76b19de1aff5ff4de64d269290bd1b07a01d3
LinuxLinux	Affected =6.5	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Bound MIDI 2.0 endpoint descriptor scans The USB MIDI 2.0 endpoint parser has the same descriptor walking pattern as the legacy MIDI parser. It validates bLength against bNumGrpTrmBlock before reading baAssoGrpTrmBlkID[], but not against the remaining bytes in the endpoint-extra scan. A malformed device can therefore make later baAssoGrpTrmBlkID[] reads consume bytes past the walked descriptor. Reject zero-length and overlong descriptors while walking endpoint extras.

References

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