CVE-2026-95520 Integer overflow in Red Hat Enterprise Linux 10
An integer overflow in RPM parsing allows heap-based buffer overflow and potential code execution when processing malicious packages.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-95520?
CVE-2026-95520 is a high-severity vulnerability in Red Hat Enterprise Linux 10, published on 29 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
A heap-based buffer overflow flaw was found in rpm. Parsing a symlink entry in an untrusted RPM package whose declared RPMTAG_LONGFILESIZES value is 0xFFFFFFFFFFFFFFFF causes an integer overflow in iterReadArchiveNext() that shrinks a buffer allocation to one byte, after which the payload's independently-controlled cpio filesize field is used to write attacker-controlled data past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an untrusted package.
Weakness: CWE-787
Which versions are affected by CVE-2026-95520?
How do I fix CVE-2026-95520?
No fix has been published for CVE-2026-95520 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-95520 being exploited?
There is no known exploitation of CVE-2026-95520 in the wild and no public exploit code.
Sources
Also known as AZL-105813, DEBIAN-CVE-2026-95520, ECHO-2188-9e89-f630, GHSA-4hhr-mf67-g46r, UBUNTU-CVE-2026-95520.