Description
A flaw was found in newlib in versions prior to 4.0.0. Improper overflow validation in the memory allocation functions mEMALIGn, pvALLOc, nano_memalign, nano_valloc, nano_pvalloc could case an integer overflow, leading to an allocation of a small buffer and then to a heap-based buffer overflow.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | newlib | newlib versions prior to 4.0.0 | — |
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 | newlib | 4.4.0.20231231-2 | — |
| Debian 14 | picolibc | 1.5-1 | — |
| Debian 13 | newlib | 4.4.0.20231231-2 | — |
| Debian 13 | picolibc | 1.5-1 | — |
| Debian 12 | newlib | 3.3.0-1.3+deb12u1 | — |
| Debian 12 | picolibc | 1.5-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | newlib | No fix yet | — |
| Ubuntu 22.04 LTS | newlib | No fix yet | — |
| Ubuntu 20.04 LTS | newlib | No fix yet | — |
| Ubuntu 18.04 LTS | newlib | No fix yet | — |
| Ubuntu 16.04 LTS | newlib | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | newlib | 4.1.0-2.2 | openSUSE-SU-2024:11086-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | newlib | 4.1.0-r0 | — |
| Alpine v3.23 | newlib | 4.1.0-r0 | — |
| Alpine v3.22 | newlib | 4.1.0-r0 | — |
| Alpine v3.21 | newlib | 4.1.0-r0 | — |
| Alpine v3.20 | newlib | 4.1.0-r0 | — |
Show 6 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | newlib | 4.1.0-r0 | — |
| Alpine v3.18 | newlib | 4.1.0-r0 | — |
| Alpine v3.17 | newlib | 4.1.0-r0 | — |
| Alpine v3.16 | newlib | 4.1.0-r0 | — |
| Alpine v3.15 | newlib | 4.1.0-r0 | — |
| Alpine v3.14 | newlib | 4.1.0-r0 | — |
Advisories 2
- openSUSE-SU-2024:11086-1 newlib-4.1.0-2.2 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026
- ICSA-21-119-04 Multiple RTOS (Update E) CISA ICS & IT advisories · Apr 19, 2022
References
- https://bugzilla.redhat.com/show_bug.cgi?id=1934088
- FEDORA-2021-332fb9c796 vendor-advisory
- FEDORA-2021-267c08cc40 vendor-advisory
- FEDORA-2021-0fa2f42d3c vendor-advisory