| Name | CVE-2026-56210 |
| Description | A heap-buffer-overflow read vulnerability was found in libaom, the reference AV1 codec implementation. A missing bounds check in the SVC (Scalable Video Coding) layer ID control function allows setting a spatial_layer_id exceeding the configured number of layers. This causes an out-of-bounds heap read of approximately 40,728 bytes when computing a layer context array index. An attacker who can influence SVC encoder parameters in a network-facing service could exploit this for information disclosure (heap content leak) or denial of service (segmentation fault from hitting unmapped memory). |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DSA-6411-1 |
| Debian Bugs | 1140428 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| aom (PTS) | bullseye | 1.0.0.errata1-3+deb11u1 | fixed |
| bullseye (security) | 1.0.0.errata1-3+deb11u2 | fixed |
| bookworm | 3.6.0-1+deb12u2 | vulnerable |
| bookworm (security) | 3.6.0-1+deb12u1 | vulnerable |
| trixie | 3.12.1-1 | vulnerable |
| trixie (security) | 3.12.1-1+deb13u1 | fixed |
| forky, sid | 3.14.1-1 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| aom | source | bullseye | (not affected) | | | |
| aom | source | trixie | 3.12.1-1+deb13u1 | | DSA-6411-1 | |
| aom | source | (unstable) | 3.14.1-1 | | | 1140428 |
Notes
[bullseye] - aom <not-affected> (1.0.0 lacks the SVC encoder layer_context array, introduced in 2.0.0)
https://aomedia.googlesource.com/aom/+/a93ba0ffaacd5f576a241bf739110e65287e516d
https://bugzilla.redhat.com/show_bug.cgi?id=2490801
https://issues.chromium.org/issues/503975732