CVE-2026-95520

Summary

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.

Affected Software

VendorProductVersion RangeStatus

Weaknesses

  • CWE-787: Out-of-bounds Write

Workarounds

To reduce exposure, avoid processing or extracting RPM packages from untrusted sources. Do not use rpm2cpio, rpm2archive, or rpm -qlvp on RPM files whose origin and integrity cannot be verified.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References