CVE-2026-98912

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.

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EPSS — Exploit Prediction

0.0019

Probability of exploitation

0.08%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/20b8520d1ef996173065f7abdde47b99136c0785 https://git.kernel.org/stable/c/2922cf2583e590f51bed613a6fcd27b9aea83674 https://git.kernel.org/stable/c/372bec8a01e2ab8eaa6851bdc346ede5f82dba99 https://git.kernel.org/stable/c/591226398c1f93bd994678237ff0be229b19d3bb https://git.kernel.org/stable/c/611f538253d970f4d152003841544e875828d015 https://git.kernel.org/stable/c/7483fd5f6990f43cc266e94b3f50ce84856ebb97 https://git.kernel.org/stable/c/b3b4b647313757a275be7f7f9d0415d0a90acf73

Frequently Asked Questions

What is CVE-2026-98912? +

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.

How do I check if I'm vulnerable to CVE-2026-98912? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.