VulnerabilityPublished 15 Aug 2026Updated 6 Nov 2026

CVE-2026-74505: Linux kernel · ALSA: 6fire: Fix UAF at error handling during probe

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in d41bfea14ee6e063a953f6e72046088737c4e66c : update Linux kernel when convenient.

Data as of 6 Nov 2026, 17:56 UTC

Severity

Medium

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

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 d41bfea14ee6e063a953f6e72046088737c4e66c, a54bf16965f896415c3337bc4fbb40fb11941d99, a0bb5b9d39e54888385dc399c899223299201fe6 +5

Exploitation evidence

Disclosed: evidence found.
CVE published 15 Aug 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 ≥ c6d43ba816d1cf1d125bfbfc938f2a28a87facf9, < d41bfea14ee6e063a953f6e72046088737c4e66c	Fixed in d41bfea14ee6e063a953f6e72046088737c4e66c
LinuxLinux	Affected ≥ c6d43ba816d1cf1d125bfbfc938f2a28a87facf9, < a54bf16965f896415c3337bc4fbb40fb11941d99	Fixed in a54bf16965f896415c3337bc4fbb40fb11941d99
LinuxLinux	Affected ≥ c6d43ba816d1cf1d125bfbfc938f2a28a87facf9, < a0bb5b9d39e54888385dc399c899223299201fe6	Fixed in a0bb5b9d39e54888385dc399c899223299201fe6
LinuxLinux	Affected ≥ c6d43ba816d1cf1d125bfbfc938f2a28a87facf9, < 630c8d6a93cbd9b2a207f1a67ef1fd21af098b0c	Fixed in 630c8d6a93cbd9b2a207f1a67ef1fd21af098b0c
LinuxLinux	Affected ≥ c6d43ba816d1cf1d125bfbfc938f2a28a87facf9, < 49bc7741cd2761c703a292dc69245041ae8a67bd	Fixed in 49bc7741cd2761c703a292dc69245041ae8a67bd
LinuxLinux	Affected ≥ c6d43ba816d1cf1d125bfbfc938f2a28a87facf9, < 11e2953d9f4c7c3d2af94a889c2d805c537d633f	Fixed in 11e2953d9f4c7c3d2af94a889c2d805c537d633f

AI-suggested

A fix is available and has been applied 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 vulnerability.

Description

A use-after-free (UAF) vulnerability was identified and fixed in the ALSA 6fire driver within the Linux kernel. The flaw occurred during error handling in the probe phase, where a pending URB was not properly freed, potentially leading to memory corruption. The patch applies cleanup procedures similar to the normal disconnect phase to address this issue.

Impact

The vulnerability could lead to use-after-free conditions during device initialization errors, potentially causing kernel memory corruption or instability. No public exploits or in-the-wild exploitation are known. The impact is limited to affected Linux kernel versions running the vulnerable 6fire driver.

Summary

CVE-2026-74505 is a use-after-free vulnerability in the ALSA 6fire driver of the Linux kernel. During the probe phase error handling, the driver failed to free a pending USB Request Block (URB) before releasing resources, which could result in a UAF condition. The fix involves applying cleanup steps akin to those used in the disconnect phase to ensure proper resource management and prevent the UAF.

References

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 6 Nov 2026, 17:56 UTC

Technical details

References

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