CVE-2026-98912 ALSA: seq: oss: Reject reads that cannot fit the next event
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-98912?
CVE-2026-98912 is a vulnerability in Linux, published on 23 Oct 2026.
Official description
In the Linux kernel, the following vulnerability has been resolved:
ALSA: seq: oss: Reject reads that cannot fit the next event
snd_seq_oss_read() checks whether the next queued OSS sequencer event fits in the remaining userspace buffer before removing it from the read queue.
The check is inverted. It currently stops when the event is smaller than the remaining buffer, so a normal 4-byte event is not copied for an 8-byte read buffer. Conversely, an 8-byte event can be copied for a smaller read count.
Break only when the remaining userspace buffer is smaller than the next event, and report -EINVAL if no complete event has been copied. This prevents an undersized read from looking like end-of-file while leaving the event queued for a later read with a large enough buffer.
Which versions are affected by CVE-2026-98912?
How do I fix CVE-2026-98912?
Upgrade to a fixed version.
Is CVE-2026-98912 being exploited?
There is no known exploitation of CVE-2026-98912 in the wild and no public exploit code.
Sources
Also known as AZL-110680, BELL-CVE-2026-98912, DEBIAN-CVE-2026-98912, GHSA-c2vm-8x7j-h34j, UBUNTU-CVE-2026-98912.