Description
In libebml before 1.4.5, an integer overflow in MemIOCallback.cpp can occur when reading or writing. It may result in buffer overflows.
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 | libebml | 1.4.5-1 | — |
| Debian 13 | libebml | 1.4.5-1 | — |
| Debian 12 | libebml | 1.4.4-1+deb12u1 | — |
| Debian 11 | libebml | 1.4.2-1+deb11u1 | DLA-4023-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 22.04 LTS | libebml | 1.4.2-2ubuntu0.1~esm1 | USN-8746-1 |
| Ubuntu Pro 20.04 LTS | libebml | 1.3.10-1ubuntu0.1~esm1 | USN-8746-1 |
| Ubuntu Pro 18.04 LTS | libebml | 1.3.5-2ubuntu0.1+esm1 | USN-8746-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | libebml | 1.3.3-1ubuntu0.1+esm1 | USN-8746-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | libebml | 1.4.5-r0 | — |
| Alpine v3.23 | libebml | 1.4.5-r0 | — |
| Alpine v3.22 | libebml | 1.4.5-r0 | — |
| Alpine v3.21 | libebml | 1.4.5-r0 | — |
| Alpine v3.20 | libebml | 1.4.5-r0 | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | libebml | 1.4.5-r0 | — |
Advisories 2
- USN-8746-1 libebml vulnerability Ubuntu Security Notices (USN) · Sep 10, 2026
- DLA-4023-1 libebml - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- https://github.com/Matroska-Org/libebml/issues/147
- https://github.com/Matroska-Org/libebml/pull/148
- https://github.com/Matroska-Org/libebml/blob/v1.x/NEWS.md
- https://github.com/Matroska-Org/libebml/compare/release-1.4.4...release-1.4.5
- FEDORA-2024-ab879eeed1 vendor-advisory
- FEDORA-2024-7261a9f668 vendor-advisory