Integer overflow in Alsa Project Alsa-Lib
CVE-2026-96674
alsa-lib through 1.2.16.1 computes combined topology element size using 32-bit arithmetic in src/topology/ctl.c, allowing integer overflow that defeats bounds checks. Attackers can supply crafted topology files that wrap size calculations, causing the decoder to read beyond the topology buffer and potentially leak sensitive data or crash the application.
Vulnerability class: Integer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L.
EPSS exploit prediction
EPSS: 0.001 (1.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 2nd percentile — 1.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.001 · newest: 0.001 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/alsa-project/alsa-lib/pull/527 (issue-tracking, patch)
- github.com/alsa-project/alsa-lib/blob/v1.2.16.1/src/topology/ctl.c (technical-description)
- github.com/alsa-project/alsa-lib/blob/v1.2.16.1/src/topology/ctl.c (technical-description)
- github.com/alsa-project/alsa-lib/blob/v1.2.16.1/src/topology/ctl.c (technical-description)
- github.com/alsa-project/alsa-lib (product)
- www.vulncheck.com/advisories/alsa-lib-through-1.2.16.1-integer-overflow-via-top… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-96674?
- CVE-2026-96674 is a medium-severity vulnerability in Alsa Project Alsa-Lib, classified under Integer Overflow or Wraparound. CVSS score: 4.4/10. Published 2026-09-23.
- How severe is CVE-2026-96674?
- Medium severity. CVSS v3 base score is 4.4 out of 10.