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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < b3b4b647313757a275be7f7f9d0415d0a90acf73affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 591226398c1f93bd994678237ff0be229b19d3bbaffected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 372bec8a01e2ab8eaa6851bdc346ede5f82dba99affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 2922cf2583e590f51bed613a6fcd27b9aea83674affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 7483fd5f6990f43cc266e94b3f50ce84856ebb97affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 20b8520d1ef996173065f7abdde47b99136c0785affected1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 611f538253d970f4d152003841544e875828d015affected
Linux Linux
Default version status: affected
2.6.12affected0 to < 2.6.12unaffected5.10.271 to ≤ 5.10.*unaffected5.15.222 to ≤ 5.15.*unaffected6.1.189 to ≤ 6.1.*unaffected6.6.158 to ≤ 6.6.*unaffected6.12.111 to ≤ 6.12.*unaffected6.18.53 to ≤ 6.18.*unaffected7.2 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/b3b4b647313757a275be7f7f9d0415d0a90acf73 ↗
- https://git.kernel.org/stable/c/591226398c1f93bd994678237ff0be229b19d3bb ↗
- https://git.kernel.org/stable/c/372bec8a01e2ab8eaa6851bdc346ede5f82dba99 ↗
- https://git.kernel.org/stable/c/2922cf2583e590f51bed613a6fcd27b9aea83674 ↗
- https://git.kernel.org/stable/c/7483fd5f6990f43cc266e94b3f50ce84856ebb97 ↗
- https://git.kernel.org/stable/c/20b8520d1ef996173065f7abdde47b99136c0785 ↗
- https://git.kernel.org/stable/c/611f538253d970f4d152003841544e875828d015 ↗