Description
An issue was discovered in CHICKEN Scheme through 4.12.0. When using a nonstandard CHICKEN-specific extension to allocate an SRFI-4 vector in unmanaged memory, the vector size would be used in unsanitised form as an argument to malloc(). With an unexpected size, the impact may have been a segfault or buffer overflow.
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 | chicken | 4.12.0-0.2 | — |
| Debian 13 | chicken | 4.12.0-0.2 | — |
| Debian 12 | chicken | 4.12.0-0.2 | — |
| Debian 7 | chicken | 4.7.0-1+deb7u2 | DLA-908-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | chicken | No fix yet | — |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | chicken | 4.12.0-r3 | — |
| Alpine v3.23 | chicken | 4.12.0-r3 | — |
| Alpine v3.22 | chicken | 4.12.0-r3 | — |
| Alpine v3.21 | chicken | 4.12.0-r3 | — |
| Alpine v3.20 | chicken | 4.12.0-r3 | — |
Show 14 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | chicken | 4.12.0-r3 | — |
| Alpine v3.18 | chicken | 4.12.0-r3 | — |
| Alpine v3.17 | chicken | 4.12.0-r3 | — |
| Alpine v3.16 | chicken | 4.12.0-r3 | — |
| Alpine v3.15 | chicken | 4.12.0-r3 | — |
| Alpine v3.14 | chicken | 4.12.0-r3 | — |
| Alpine v3.13 | chicken | 4.12.0-r3 | — |
| Alpine v3.12 | chicken | 4.12.0-r3 | — |
| Alpine v3.11 | chicken | 4.12.0-r3 | — |
| Alpine v3.10 | chicken | 4.12.0-r3 | — |
| Alpine v3.9 | chicken | 4.12.0-r3 | — |
| Alpine v3.8 | chicken | 4.12.0-r3 | — |
| Alpine v3.7 | chicken | 4.12.0-r3 | — |
| Alpine v3.6 | chicken | 4.12.0-r3 | — |
Advisories 1
- DLA-908-1 chicken - security update Debian Security (DSA / DLA) · Mar 9, 2026