CVE-2026-103242
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Summary
A heap-based buffer overflow flaw was found in rpm. RPMTAG_FILESIGNATURES in a crafted, unsigned RPM package's main header is declared with the wrong header type, causing hex2binv() to allocate a one-byte buffer and then write the tag's attacker-controlled, hex-decoded content — of attacker-chosen length — past the end of that allocation. This is reachable via rpm2cpio, rpm2archive, and rpm -qlvp on an untrusted package.
Affected Software
| Vendor | Product | Version Range | Status |
|---|
Weaknesses
- CWE-122: Heap-based Buffer Overflow
Workarounds
Avoid processing or extracting RPM packages from untrusted or unsigned sources. Do not run rpm -qlvp, rpm2cpio, or rpm2archive against RPM files whose origin and integrity cannot be verified.
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: no
- Technical Impact: total
References
- https://access.redhat.com/security/cve/CVE-2026-103242
- https://bugzilla.redhat.com/show_bug.cgi?id=2543866
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