Vulnerability · Published Sep 14, 2026 · Assigned by VulDB

CVE-2026-90801GNU Binutils ld cache.c cache_bwrite buffer overflow

Medium 5.3

In plain English

A medium-severity buffer overflow in Binutils from GNU. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities).

Severity (CVSS 3.1)5.3Medium

Exploit odds (30 days)0.2%top 89.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A security flaw has been discovered in GNU Binutils 2.47. This impacts the function cache_bwrite of the file bfd/cache.c of the component ld. The manipulation of the argument nbytes results in buffer overflow. The attack requires a local approach. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through a bug report but has not responded yet.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	binutils	no fix listed	DEBIAN-CVE-2026-90801
Debian:13	binutils	no fix listed	DEBIAN-CVE-2026-90801
Debian:14	binutils	no fix listed	DEBIAN-CVE-2026-90801
Ubuntu:22.04:LTS	binutils	no fix listed	UBUNTU-CVE-2026-90801
Ubuntu:24.04:LTS	binutils	no fix listed	UBUNTU-CVE-2026-90801
Ubuntu:26.04:LTS	binutils	no fix listed	UBUNTU-CVE-2026-90801
Ubuntu:26.10	binutils	no fix listed	UBUNTU-CVE-2026-90801

Affected products (as reported)

Vendor	Product	Versions
GNU	Binutils	2.47

Weakness: CWE-120, CWE-119 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References

VDB-403303 | GNU Binutils ld cache.c cache_bwrite buffer overflow vdb-entry, technical-description
VDB-403303 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-90801 | CVE Analysis and Report third-party-advisory
Submit #920276 | GNU Binutils 2.47 (version date 20260726) Heap-based Buffer Overflow third-party-advisory
https://sourceware.org/bugzilla/show_bug.cgi?id=34442 issue-tracking
https://github.com/r1ck9-2q/cve_summit/blob/main/Heap-buffer-overflow%20in%20%60cache_bwrite%60%20(bfdcache.c436)%20via%20malformed%20ELF%20with%20%60--gc-sections%20-w%60.md exploit
https://www.gnu.org/ broken-link, product