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CVE-2026-98912

Linux: ALSA: seq: oss: Reject reads that cannot fit the next event

Linux LinuxOperating systems
Open in ThreatlineRecord JSON
CVSS
NoneNot scored
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)No scoreNo FIRST EPSS score in this snapshot yet
Fixed in591226398c1f93bd994678237ff0be229b19d3bbAlso 372bec8a01e2ab8eaa6851bdc346ede5f82dba99, 2922cf2583e590f51bed613a6fcd27b9aea83674 and 9 moreCVE List
Published23 Oct 2026Updated 23 Oct 2026CVE List

What fixes it

  • 591226398c1f93bd994678237ff0be229b19d3bbLinuxCVE List
  • 372bec8a01e2ab8eaa6851bdc346ede5f82dba99LinuxCVE List
  • 2922cf2583e590f51bed613a6fcd27b9aea83674LinuxCVE List
  • 7483fd5f6990f43cc266e94b3f50ce84856ebb97LinuxCVE List
  • 20b8520d1ef996173065f7abdde47b99136c0785LinuxCVE List
  • 611f538253d970f4d152003841544e875828d015LinuxCVE List
Show all 12 fixed versions

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 20

  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before b3b4b647313757a275be7f7f9d0415d0a90acf73CVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 591226398c1f93bd994678237ff0be229b19d3bbCVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 372bec8a01e2ab8eaa6851bdc346ede5f82dba99CVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 2922cf2583e590f51bed613a6fcd27b9aea83674CVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 7483fd5f6990f43cc266e94b3f50ce84856ebb97CVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 20b8520d1ef996173065f7abdde47b99136c0785CVE List
  • Linuxaffected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 611f538253d970f4d152003841544e875828d015CVE List
  • Linuxaffected: all versions before 5.10.271CVE List
  • Linuxaffected: all versions before 5.15.222CVE List
  • Linuxaffected: all versions before 6.1.189CVE List
  • Linuxaffected: all versions before 6.6.158CVE List
  • Linuxaffected: all versions before 6.12.111CVE List
  • Linuxaffected: all versions before 6.18.53CVE List
  • Linuxunaffected: 5.10.271 through 5.10.*CVE List
  • Linuxunaffected: 5.15.222 through 5.15.*CVE List
  • Linuxunaffected: 6.1.189 through 6.1.*CVE List
  • Linuxunaffected: 6.6.158 through 6.6.*CVE List
  • Linuxunaffected: 6.12.111 through 6.12.*CVE List
  • Linuxunaffected: 6.18.53 through 6.18.*CVE List
  • Linuxunaffected: 7.2CVE List

References 7