Linux Kernel ALSA seq:oss Read Buffer Validation Fault
CVE-2026-98912 Published on October 23, 2026
ALSA: seq: oss: Reject reads that cannot fit the next event
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.
Products Associated with CVE-2026-98912
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Affected Versions
Linux:- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below b3b4b647313757a275be7f7f9d0415d0a90acf73 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 591226398c1f93bd994678237ff0be229b19d3bb is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 372bec8a01e2ab8eaa6851bdc346ede5f82dba99 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 2922cf2583e590f51bed613a6fcd27b9aea83674 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 7483fd5f6990f43cc266e94b3f50ce84856ebb97 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 20b8520d1ef996173065f7abdde47b99136c0785 is affected.
- Version 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and below 611f538253d970f4d152003841544e875828d015 is affected.
- Version 2.6.12 is affected.
- Before 2.6.12 is unaffected.
- Version 5.10.271, <= 5.10.* is unaffected.
- Version 5.15.222, <= 5.15.* is unaffected.
- Version 6.1.189, <= 6.1.* is unaffected.
- Version 6.6.158, <= 6.6.* is unaffected.
- Version 6.12.111, <= 6.12.* is unaffected.
- Version 6.18.53, <= 6.18.* is unaffected.
- Version 7.2, <= * is unaffected.