Is CVE-2026-103242 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-103242 being exploited in the wild.

How severe is CVE-2026-103242?

High severity, with a CVSS score of 7.1, published 30 September 2026.

Is there a fix for CVE-2026-103242?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-103242 attacked?

It is attacked with local access.

Am I affected by CVE-2026-103242?

Check whether you run RPM Project RPM at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-103242: RPM heap-based buffer overflow in RPMTAG_FILESIGNATURES parsing

CVE-2026-103242 · Severity: high · CVSS 7.1 · Published 2026-09-30

RPM is a package manager used to install and manage software on Linux systems. A flaw in how RPM processes package headers allows an attacker to craft a malicious RPM file that, when opened with tools like rpm2cpio or rpm -qlvp, triggers a buffer overflow that can crash the program or potentially allow code execution. The vulnerability requires local user action to open the malicious package.

Technologies: RPM Project RPM. Vendors: RPM Project.

Quick answers

Is CVE-2026-103242 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-103242 being exploited in the wild.
How severe is CVE-2026-103242?: High severity, with a CVSS score of 7.1, published 30 September 2026.
Which products and versions are affected?: RPM Project RPM <UNKNOWN>.
Is there a fix for CVE-2026-103242?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-103242 attacked?: It is attacked with local access.
Am I affected by CVE-2026-103242?: Check whether you run RPM Project RPM at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

A heap-based buffer overflow exists in the hex2binv() function when processing RPMTAG_FILESIGNATURES in a crafted RPM package header with an incorrect type declaration. The wrong type causes allocation of a one-byte buffer while allowing attacker-controlled, hex-decoded content of arbitrary length to be written past the buffer boundary. The flaw is reachable via rpm2cpio, rpm2archive, and rpm -qlvp with untrusted packages; exploitation requires local user interaction and results in reliable crashes with potential for code execution via heap metadata corruption.

Affected products

RPM Project RPM <UNKNOWN>

Timeline

2026-09-30: disclosed

References

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