Description
musl libc through 1.1.23 has an x87 floating-point stack adjustment imbalance, related to the math/i386/ directory. In some cases, use of this library could introduce out-of-bounds writes that are not present in an application's source code.
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 | musl | 1.1.23-2 | — |
| Debian 13 | musl | 1.1.23-2 | — |
| Debian 12 | musl | 1.1.23-2 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 20.04 LTS | musl | 1.1.24-1ubuntu0.1~esm1 | USN-5990-1 |
| Ubuntu Pro 18.04 LTS | musl | 1.1.19-1ubuntu0.1~esm1 | USN-5990-1 |
| Ubuntu Pro 16.04 LTS | musl | 1.1.9-1ubuntu0.1~esm3 | USN-5990-1 |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | musl | 0.9.15-1ubuntu0.1~esm2 | USN-5990-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | flannel | 0.14.0-1.2 | openSUSE-SU-2024:10761-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | musl | 1.1.23-r2 | — |
| Alpine v3.23 | musl | 1.1.23-r2 | — |
| Alpine v3.22 | musl | 1.1.23-r2 | — |
| Alpine v3.21 | musl | 1.1.23-r2 | — |
| Alpine v3.20 | musl | 1.1.23-r2 | — |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | musl | 1.1.23-r2 | — |
| Alpine v3.18 | musl | 1.1.23-r2 | — |
| Alpine v3.17 | musl | 1.1.23-r2 | — |
| Alpine v3.16 | musl | 1.1.23-r2 | — |
| Alpine v3.15 | musl | 1.1.23-r2 | — |
| Alpine v3.14 | musl | 1.1.23-r2 | — |
| Alpine v3.13 | musl | 1.1.23-r2 | — |
| Alpine v3.12 | musl | 1.1.23-r2 | — |
| Alpine v3.11 | musl | 1.1.23-r2 | — |
| Alpine v3.10 | musl | 1.1.22-r3 | — |
| Alpine v3.9 | musl | 1.1.20-r5 | — |
| Alpine v3.8 | musl | 1.1.19-r11 | — |
| Alpine v3.7 | musl | 1.1.18-r4 | — |
Advisories 2
- USN-5990-1 musl vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- openSUSE-SU-2024:10761-1 flannel-0.14.0-1.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026