CVE catalog
CVE-2021-3420
newlib: CVE-2021-3420
- Severity
- Critical · CVSS 9.8
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 2.10% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | newlib | sid | 4.6.0.20260123-2 | fixed |
| Debian | newlib | forky | 4.6.0.20260123-2 | fixed |
| Debian | newlib | trixie | 4.5.0.20241231-1 | fixed |
| Debian | newlib | bookworm | 3.3.0-1.3+deb12u1 | fixed |
| Debian | picolibc | sid | 1.8.12-1 | fixed |
| Debian | picolibc | forky | 1.8.12-1 | fixed |
| Debian | picolibc | trixie | 1.8.10-2 | fixed |
| Debian | picolibc | bookworm | 1.8-1 | fixed |
| Ubuntu | newlib | 16.04 | 2.1.0+git20141201.db59ff3-2 | vulnerable |
| Ubuntu | newlib | 16.04 | 2.2.0+git20150830.5a3d536-1 | vulnerable |
| Ubuntu | newlib | 18.04 | 2.4.0.20160527-2 | vulnerable |
| Ubuntu | newlib | 18.04 | 2.4.0.20160527-3 | vulnerable |
| Ubuntu | newlib | 18.04 | 2.4.0.20160527-3ubuntu0.1 | vulnerable |
| Ubuntu | newlib | 20.04 | 3.1.0.20181231-1 | vulnerable |
| Ubuntu | newlib | 20.04 | 3.3.0-0ubuntu1 | vulnerable |
| Ubuntu | newlib | 22.04 | 3.3.0-1 | vulnerable |
| Ubuntu | newlib | 22.04 | 3.3.0-1.2 | vulnerable |
| Ubuntu | newlib | 22.04 | 3.3.0-1.3 | vulnerable |
| Ubuntu | newlib | 24.04 | 3.3.0-1.3 | vulnerable |
| Ubuntu | newlib | 24.04 | 4.4.0.20231231-2 | vulnerable |
| Opensuse | newlib | tumbleweed | 4.1.0-2.2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | newlib | source | sid | 4.4.0.20231231-2 | not yet assigned | Not reported | [984446] |
| Debian | newlib | source | forky | 4.4.0.20231231-2 | not yet assigned | Not reported | [984446] |
| Debian | newlib | source | trixie | 4.4.0.20231231-2 | not yet assigned | Not reported | [984446] |
| Debian | newlib | source | bookworm | 3.3.0-1.3+deb12u1 | not yet assigned | Not reported | [984446] |
| Debian | picolibc | source | sid | 1.5-1 | not yet assigned | Not reported | Not reported |
| Debian | picolibc | source | forky | 1.5-1 | not yet assigned | Not reported | Not reported |
| Debian | picolibc | source | trixie | 1.5-1 | not yet assigned | Not reported | Not reported |
| Debian | picolibc | source | bookworm | 1.5-1 | not yet assigned | Not reported | Not reported |
| Opensuse | newlib | rpm | tumbleweed | 4.1.0-2.2 | Not reported | OPENSUSE-SU-2024:11086-1 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libnewlib-arm-none-eabi]Fixed
Source package: [newlib]
Details (2)
3.3.0-1.3+deb12u1· all · bookwormFixed · Fixed:
3.3.0-1.3+deb12u1dsa · newlib · debian · bookworm; dsa · newlib · debian · 12
3.3.0-1.3+deb12u1· all · bookwormFixed · Fixed:
3.3.0-1.3+deb12u1dsa · newlib · debian · bookworm; dsa · newlib · debian · 12
- [libnewlib-dev]Fixed
Source package: [newlib]
Details (2)
3.3.0-1.3+deb12u1· all · bookwormFixed · Fixed:
3.3.0-1.3+deb12u1dsa · newlib · debian · bookworm; dsa · newlib · debian · 12
3.3.0-1.3+deb12u1· all · bookwormFixed · Fixed:
3.3.0-1.3+deb12u1dsa · newlib · debian · bookworm; dsa · newlib · debian · 12
- [libnewlib-doc]Fixed
Source package: [newlib]
Details (2)
3.3.0-1.3+deb12u1· all · bookwormFixed · Fixed:
3.3.0-1.3+deb12u1dsa · newlib · debian · bookworm; dsa · newlib · debian · 12
3.3.0-1.3+deb12u1· all · bookwormFixed · Fixed:
3.3.0-1.3+deb12u1dsa · newlib · debian · bookworm; dsa · newlib · debian · 12
- [newlib-source]Fixed
Source package: [newlib]
Details (2)
3.3.0-1.3+deb12u1· all · bookwormFixed · Fixed:
3.3.0-1.3+deb12u1dsa · newlib · debian · bookworm; dsa · newlib · debian · 12
3.3.0-1.3+deb12u1· all · bookwormFixed · Fixed:
3.3.0-1.3+deb12u1dsa · newlib · debian · bookworm; dsa · newlib · debian · 12
- [picolibc-aarch64-linux-gnu]Fixed
Source package: [picolibc]
Details (2)
1.8-1· all · bookwormFixed · Fixed:
1.5-1dsa · picolibc · debian · bookworm; dsa · picolibc · debian · 12
1.8-1· all · bookwormFixed · Fixed:
1.5-1dsa · picolibc · debian · bookworm; dsa · picolibc · debian · 12
- [picolibc-arm-none-eabi]Fixed
Source package: [picolibc]
Details (2)
1.8-1· all · bookwormFixed · Fixed:
1.5-1dsa · picolibc · debian · bookworm; dsa · picolibc · debian · 12
1.8-1· all · bookwormFixed · Fixed:
1.5-1dsa · picolibc · debian · bookworm; dsa · picolibc · debian · 12
- [picolibc-riscv64-unknown-elf]Fixed
Source package: [picolibc]
Details (2)
1.8-1· all · bookwormFixed · Fixed:
1.5-1dsa · picolibc · debian · bookworm; dsa · picolibc · debian · 12
1.8-1· all · bookwormFixed · Fixed:
1.5-1dsa · picolibc · debian · bookworm; dsa · picolibc · debian · 12
- [picolibc-xtensa-lx106-elf]Fixed
Source package: [picolibc]
Details (2)
1.8-1· all · bookwormFixed · Fixed:
1.5-1dsa · picolibc · debian · bookworm; dsa · picolibc · debian · 12
1.8-1· all · bookwormFixed · Fixed:
1.5-1dsa · picolibc · debian · bookworm; dsa · picolibc · debian · 12
[Debian 13 (Trixie)]
- [libnewlib-arm-none-eabi]Fixed
Source package: [newlib]
Details (2)
4.5.0.20241231-1· all · trixieFixed · Fixed:
4.4.0.20231231-2dsa · newlib · debian · 13
4.5.0.20241231-1· all · trixieFixed · Fixed:
4.4.0.20231231-2dsa · newlib · debian · 13
- [libnewlib-dev]Fixed
Source package: [newlib]
Details (2)
4.5.0.20241231-1· all · trixieFixed · Fixed:
4.4.0.20231231-2dsa · newlib · debian · 13
4.5.0.20241231-1· all · trixieFixed · Fixed:
4.4.0.20231231-2dsa · newlib · debian · 13
- [libnewlib-doc]Fixed
Source package: [newlib]
Details (2)
4.5.0.20241231-1· all · trixieFixed · Fixed:
4.4.0.20231231-2dsa · newlib · debian · 13
4.5.0.20241231-1· all · trixieFixed · Fixed:
4.4.0.20231231-2dsa · newlib · debian · 13
- [newlib-source]Fixed
Source package: [newlib]
Details (2)
4.5.0.20241231-1· all · trixieFixed · Fixed:
4.4.0.20231231-2dsa · newlib · debian · 13
4.5.0.20241231-1· all · trixieFixed · Fixed:
4.4.0.20231231-2dsa · newlib · debian · 13
- [picolibc-aarch64-linux-gnu]Fixed
Source package: [picolibc]
Details (2)
1.8.10-2· all · trixieFixed · Fixed:
1.5-1dsa · picolibc · debian · 13
1.8.10-2· all · trixieFixed · Fixed:
1.5-1dsa · picolibc · debian · 13
- [picolibc-arm-none-eabi]Fixed
Source package: [picolibc]
Details (2)
1.8.10-2· all · trixieFixed · Fixed:
1.5-1dsa · picolibc · debian · 13
1.8.10-2· all · trixieFixed · Fixed:
1.5-1dsa · picolibc · debian · 13
- [picolibc-riscv64-unknown-elf]Fixed
Source package: [picolibc]
Details (2)
1.8.10-2· all · trixieFixed · Fixed:
1.5-1dsa · picolibc · debian · 13
1.8.10-2· all · trixieFixed · Fixed:
1.5-1dsa · picolibc · debian · 13
- [picolibc-xtensa-lx106-elf]Fixed
Source package: [picolibc]
Details (2)
1.8.10-2· all · trixieFixed · Fixed:
1.5-1dsa · picolibc · debian · 13
1.8.10-2· all · trixieFixed · Fixed:
1.5-1dsa · picolibc · debian · 13
[openSUSE Tumbleweed]
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2024_11086-1.json]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2021-3420]
- [https://osv.dev/vulnerability/UBUNTU-CVE-2021-3420]
- [https://osv.dev/vulnerability/openSUSE-SU-2024:11086-1]
- [https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/OT/white/2021/icsa-21-119-04.json]
- [https://security-tracker.debian.org/tracker/CVE-2021-3420]
- [https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-3420.json]
[CISA cybersecurity advisories] · [Debian Security Tracker] · [FIRST EPSS] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]