CVE-2026-98316
ALSA: bcd2000: Fix race between rawmidi and disconnect
No known exploitation. EPSS puts it in the 7th percentile. Fixed versions are out.
What to do
Find your product and version, then upgrade to the build on the right.
- LinuxAffected: ≥ 3c00004f134fc819f9d9e202c6a64acde0a1f8d0, < 3b824930259d54f5047ce6b5c97bd20db2fc2b98Upgrade to: 3b824930259d54f5047ce6b5c97bd20db2fc2b98Affected: ≥ 6c07aad8a7c9ef8ebc4d03a964b882123a349a2e, < c83d6b0a65f7b71bbabcc91c045dfbffdff6ae76Upgrade to: c83d6b0a65f7b71bbabcc91c045dfbffdff6ae76Affected: ≥ eb482a06791d6168beb8c78cc904ac5a5ed96a55, < 0a7ecf52cb59ed77ec525deb52c496ea8fba10b1Upgrade to: 0a7ecf52cb59ed77ec525deb52c496ea8fba10b1Affected: ≥ 7df3194bdb7479cad9199889655a566a2c0c1d1b, < 812ca56867bec3065c2a27f1ff5ce04e2a8bf4f0Upgrade to: 812ca56867bec3065c2a27f1ff5ce04e2a8bf4f0 + 11 more branchesStated by: CVE record
Versions as the sources state them. Full version matrix after sign-in
What it is
From the CVE record
In the Linux kernel, the following vulnerability has been resolved: ALSA: bcd2000: Fix race between rawmidi and disconnect Although we tried to fix the potential UAF issues at USB disconnect on bcd2000 driver, there is still an overlooked case -- namely, when a rawmidi trigger callback has been already running at USB disconnect handling, the in-flight function (e.g. bcd2000_midi_send()) could still access the URB, because the previous URB NULL-check & clearance was considered only for the URB complete callbacks, but not about the parallel rawmidi operations. For addressing the race, this patch introduced a new spinlock that covers each rawmidi operation as well as the rawmidi handling in the complete callback. The URB is cleared with the lock, so it guarantees that the pending rawmidi task already finished or a NULL check is effective.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.2% chance of exploitation activity in the next 30 days, which ranks it in the 7th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
2 events over 0 days, from the signal feeds we watch.
- Publishedrecord updated
Affected products
Sources
References in the record
- git.kernel.org/stable/c/3b824930259d54f5047ce6b5c97bd20db2fc2b98
- git.kernel.org/stable/c/c83d6b0a65f7b71bbabcc91c045dfbffdff6ae76
- git.kernel.org/stable/c/0a7ecf52cb59ed77ec525deb52c496ea8fba10b1
And 3 more references. See all after sign-in
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