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CVE-2026-12087 on CTRL-OS 26.05

Aliases: CVE-2026-12087

Packages: perl

Status: Plausible

Advisory Information

Socket versions before 2.041 for Perl have an out-of-bounds heap read.

In Socket.xs, pack_ip_mreq_source() checks the length of its source argument before the argument is read, so the check tests the byte length carried over from the preceding multiaddr argument instead. Both addresses occupy a 4-byte field, so a valid multiaddr lets a source of any length pass the check, and the source is then copied into the 4-byte imr_sourceaddr field with a fixed-size copy. A source shorter than 4 bytes is not rejected, and the copy reads up to 3 bytes past the end of its buffer.

Calling pack_ip_mreq_source() with a source value shorter than 4 bytes copies adjacent heap memory into the returned packed structure.

Updates

2026-07-23 22:12 CEST

Metadata changes:

  • Status for package perl: “Plausible”

2026-06-16 17:16 CEST

Metadata changes:

  • Status for package perl: “New”

(Amended on: 2026-07-23 22:10 CEST)