CVE-2026-98266 (GCVE-0-2026-98266)

Vulnerability from cvelistv5 – Published: 2026-10-06 08:45 – Updated: 2026-10-07 06:49
VLAI
Title
ALSA: core: Fix potential UAF after asynchronous card release
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: core: Fix potential UAF after asynchronous card release Usually a sound driver releases the resources assigned to the card via snd_card_free(), and it synchronizes with the whole release procedure. However, when the card is released asynchronously via snd_card_free_when_closed() like USB-audio driver, the situation is slightly different; although the snd_card_disconnect() call at the disconnection guarantees that any newer accesses will be gated, the in-flight tasks might be still accessing to the underlying card->dev device even after the disconnection, which would cause a use-after-free in the end, as reported by fuzzers. For addressing the bug above, this patch takes the refcount of card->dev at initialization of the card object, and releases at its destructor. This assures the availability of the card->dev in its whole lifecycle.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 5c0df40aa577e405c458e44e8d458dd78407f4af (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 2dec4642589a663e064e4411d92d6e8fa250d53b (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 398b21608955c9712a012355b69a39407367edc9 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < fd95e68df6fe66344161a1329cbe5e5805e7b704 (git)
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Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 6.12.112 , ≤ 6.12.* (semver)
Unaffected: 6.18.54 , ≤ 6.18.* (semver)
Unaffected: 7.2.8 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc4 , ≤ * (original_commit_for_fix)
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}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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