Perl versions through 5.45.1 have out-of-bounds heap reads and writes during regular expression matching via an undersized superlinear cache in S_regmatch

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AZL-94670 CVE-2026-15534 affecting package perl for versions less than 5.38.2-516

Perl versions through 5.45.1 have out-of-bounds heap reads and writes during regular expression matching via an undersized superlinear cache in Sregmatch. The regex engine's superlinear cache holds one bit per subject position for each participating WHILEM node, so the bit count is the subject...

CVE-2026-15534

Perl versions through 5.45.1 have out-of-bounds heap reads and writes during regular expression matching via an undersized superlinear cache in Sregmatch. The regex engine's superlinear cache holds one bit per subject position for each participating WHILEM node, so the bit count is the subject...

PT-2026-69304

Name of the Vulnerable Software and Affected Versions Perl versions prior to 5.45.2 Description Out-of-bounds heap reads and writes occur during regular expression matching due to an undersized superlinear cache in the S regmatch function. The regex engine calculates the bit count for the...

Linux Distros Unpatched Vulnerability : CVE-2026-15534

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - Perl versions through 5.45.1 have out-of-bounds heap reads and writes during regular expression matching via an undersized superlinear cache in Sregmatch. The...

Internet Bug Bounty: read outside of buffer (heap buffer overflow) in S_regmatch - regexec.c:6057

Reported to the Perl security mailing list on 20 August 2016, reported fixed by khw on 30 August 2016. ==14086==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x61900000a4aa at pc 0x000000b9988f bp 0x7fff325d9630 sp 0x7fff325d9628 READ of size 1 at 0x61900000a4aa thread T0 0 0xb9988e in...

Gentoo Security Advisory GLSA 201507-11

Gentoo Linux Local Security Checks GLSA 201507-11 SPDX-FileCopyrightText: 2015 Eero Volotinen Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-or-later ifdescription...

Perl: Denial of service

Background Perl is a highly capable, feature-rich programming language. Description Sregmatch function lacks proper checks before passing arguments to atoi Impact A remote attacker could send a specially crafted input, possibly resulting in a Denial of Service condition. Workaround There is no...