CVE-2026-48112

Name	CVE-2026-48112
Description	7-Zip is a file archiver with a high compression ratio. Versions 9.18 through 26.00 contain a heap out-of-bounds read in 7-Zip Ar handler BSD SYMDEF parser. A 4-byte heap out-of-bounds read exists in the Unix ar archive parser in 7-Zip. When parsing a BSD-style __.SYMDEF symbol table, the ParseLibSymbols function reads a 32-bit namesSize field via Get32 at a position that can equal the buffer size, reading 4 bytes past the end of the heap allocation. This reads uninitialized heap data under the default allocator. Version 26.01 patches the issue.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
7zip (PTS)	bookworm	22.01+really25.01+dfsg-0+deb12u1	vulnerable
	trixie	25.01+dfsg-1~deb13u2	vulnerable
	forky, sid	26.01+dfsg-2	fixed
p7zip (PTS)	bullseye	16.02+dfsg-8	vulnerable
	bullseye (security)	16.02+really25.01+dfsg-0+deb11u1	vulnerable
	bookworm	16.02+really25.01+dfsg-0+deb12u1	vulnerable
	trixie	16.02+transitional.1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
7zip	source	(unstable)	26.01+dfsg-1
p7zip	source	(unstable)	16.02+transitional.1

Notes

[trixie] - 7zip <no-dsa> (Minor issue)
[bookworm] - 7zip <no-dsa> (Minor issue)
Since p7zip/16.02+transitional.1 src:p7zip is only a empty source package
depending on 7zip. Mark this version as fixed version.
https://securitylab.github.com/advisories/GHSL-2026-115_GHSL-2026-122_7-zip/