Description
libaec through 1.1.7 contains an out-of-bounds read vulnerability in m_se_decode() in src/decode.c that allows attackers to bypass a signed bounds check via an overlong fundamental sequence. Attackers can supply a crafted CCSDS 121.0/SZIP stream with 2^31 or more zero bits to crash the decoder or leak adjacent memory into decoded samples.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Deutsches Klimarechenzentrum | libaec | ≤ 1.1.7 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libaec | 1.1.8-1 | — |
| Debian 13 | libaec | No fix yet | — |
| Debian 12 | libaec | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | libaec | No fix yet | — |
| Ubuntu 26.04 LTS | libaec | No fix yet | — |
| Ubuntu 24.04 LTS | libaec | No fix yet | — |
| Ubuntu 22.04 LTS | libaec | No fix yet | — |
| Ubuntu 20.04 LTS | libaec | No fix yet | — |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | libaec | No fix yet | — |
| Ubuntu 16.04 LTS | libaec | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | libaec | 1.1.8-1.1 | openSUSE-SU-2026:12461-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | libaec | No fix yet | — |
Advisories 1
- openSUSE-SU-2026:12461-1 libaec-devel-1.1.8-1.1 on GA media SUSE / openSUSE Security Updates · Nov 7, 2026
References
- https://github.com/Deutsches-Klimarechenzentrum/libaec/issues/64 issue-tracking
- https://github.com/Deutsches-Klimarechenzentrum/libaec/pull/66 issue-tracking patch
- https://github.com/Deutsches-Klimarechenzentrum/libaec/blob/v1.1.7/src/decode.c#L556-L586 technical-description
- libaec v1.1.7 Release Notes release-notes
- https://hackmd.io/@haindpwn/libaec-se-decode-fs-signedness-oob-read technical-description
- VulnCheck Advisory: libaec through 1.1.7 Out-of-Bounds Read via m_se_decode() Second Extension Decoder third-party-advisory