Description
An error in the "read_metadata_vorbiscomment_()" function (src/libFLAC/stream_decoder.c) in FLAC version 1.3.2 can be exploited to cause a memory leak via a specially crafted FLAC file.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| FLAC | FLAC | 1.3.2 | — |
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 | flac | 1.3.2-2 | — |
| Debian 13 | flac | 1.3.2-2 | — |
| Debian 12 | flac | 1.3.2-2 | — |
| Debian 9 | flac | 1.3.2-2+deb9u1 | DLA-2514-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | praat | No fix yet | — |
| Ubuntu 26.04 LTS | praat | No fix yet | — |
| Ubuntu 25.10 | praat | No fix yet | — |
| Ubuntu 24.04 LTS | praat | No fix yet | — |
| Ubuntu 22.04 LTS | flac | 1.3.3-2ubuntu0.1 | USN-5733-1 |
| Ubuntu 22.04 LTS | praat | No fix yet | — |
Show 5 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | flac | 1.3.3-1ubuntu0.1 | USN-5733-1 |
| Ubuntu 20.04 LTS | praat | No fix yet | — |
| Ubuntu 18.04 LTS | flac | 1.3.2-1ubuntu0.1 | USN-5733-1 |
| Ubuntu 18.04 LTS | praat | No fix yet | — |
| Ubuntu 16.04 LTS | praat +2 | No fix yet | — |
| Ubuntu Pro 16.04 LTS | flac | 1.3.1-4ubuntu0.1~esm1 | USN-5733-1 |
| Ubuntu Pro 14.04 LTS | flac | 1.3.0-2ubuntu0.14.04.1+esm1 | USN-5733-1 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | flac | 1.3.2-3.3.20 | SUSE-SU-2019:0920-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | flac | 1.3.3-1.9 | openSUSE-SU-2024:10760-1 |
| openSUSE Leap 15.0 | flac | 1.3.2-lp150.2.3.1 | openSUSE-SU-2019:1225-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | flac | 1.3.2-r2 | — |
| Alpine v3.23 | flac | 1.3.2-r2 | — |
| Alpine v3.22 | flac | 1.3.2-r2 | — |
| Alpine v3.21 | flac | 1.3.2-r2 | — |
| Alpine v3.20 | flac | 1.3.2-r2 | — |
Show 12 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | flac | 1.3.2-r2 | — |
| Alpine v3.18 | flac | 1.3.2-r2 | — |
| Alpine v3.17 | flac | 1.3.2-r2 | — |
| Alpine v3.16 | flac | 1.3.2-r2 | — |
| Alpine v3.15 | flac | 1.3.2-r2 | — |
| Alpine v3.14 | flac | 1.3.2-r2 | — |
| Alpine v3.13 | flac | 1.3.2-r2 | — |
| Alpine v3.12 | flac | 1.3.2-r2 | — |
| Alpine v3.11 | flac | 1.3.2-r2 | — |
| Alpine v3.10 | flac | 1.3.2-r2 | — |
| Alpine v3.9 | flac | 1.3.2-r2 | — |
| Alpine v3.8 | flac | 1.3.2-r2 | — |
Advisories 5
- USN-5733-1 flac vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- DLA-2514-1 flac - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2019:0920-1 Security update for flac SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10760-1 flac-1.3.3-1.9 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2019:1225-1 Security update for flac SUSE / openSUSE Security Updates · May 7, 2025
References
- https://secuniaresearch.flexerasoftware.com/advisories/82639/
- https://git.xiph.org/?p=flac.git%3Ba=commit%3Bh=4f47b63e9c971e6391590caf00a0f2a5ed612e67
- https://secuniaresearch.flexerasoftware.com/secunia_research/2017-7/
- [debian-lts-announce] 20210104 [SECURITY] [DLA 2514-1] flac security update mailing-list
- FEDORA-2021-ed9c13a1d5 vendor-advisory
- FEDORA-2021-a48ccc6754 vendor-advisory