CVE-2026-95520

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.

CVSS v3 7.1 HIGH

7.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.2

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://access.redhat.com/security/cve/CVE-2026-95520
https://bugzilla.redhat.com/show_bug.cgi?id=2537809

Configurations

No configuration.

History

29 Sep 2026, 12:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-29 12:17

Updated : 2026-09-29 21:29

NVD link : CVE-2026-95520

Mitre link : CVE-2026-95520

CVE.ORG link : CVE-2026-95520

JSON object : View

Products Affected

No product.

CWE

CWE-787

Out-of-bounds Write

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