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OpenAdvisories
High · 8.4 CVE-2026-57432 EUVD-2026-43502GHSA-5g35-5jrj-f39p

Perl versions before 5.40.5-RC1, from 5.41.0 before 5.42.3-RC1, from 5.43.0 before 5.43.11 have an integer overflow in S_measure_struct leading to an out-of-bounds heap read in pack and unpack

Published Jul 13, 2026 · Updated Nov 10, 2026 · Assigned by CPANSec

Description

Perl versions before 5.40.5-RC1, from 5.41.0 before 5.42.3-RC1, from 5.43.0 before 5.43.11 have an integer overflow in S_measure_struct leading to an out-of-bounds heap read in pack and unpack.

S_measure_struct adds each item's size times its repeat count to a running total with no overflow check, so a large repeat count in a pack or unpack template wraps the signed SSize_t total negative. The @, X, and x position codes then guard their moves with a signed length comparison that passes when the length is negative, advancing the buffer pointer out of bounds.

A template derived from untrusted input can read heap memory past the buffer and return it to the caller.

Affected products

VendorProductAffectedFixed
— perl < 5.40.5-RC1, 5.41.0 – < 5.42.3-RC1, 5.43.0 – < 5.43.11 5.40.5-RC1

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 perl 5.40.1-8 —
Debian 13 perl 5.40.1-6+deb13u1 —
Debian 12 perl 5.36.0-7+deb12u4 —
ReleasePackageFixed inAdvisory
Ubuntu 26.04 LTS perl 5.40.1-7ubuntu0.3 USN-8675-2
Ubuntu 24.04 LTS perl 5.38.2-3.2ubuntu0.4 USN-8684-1
Ubuntu 22.04 LTS perl 5.34.0-3ubuntu1.8 USN-8675-1
Show 4 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu Pro 20.04 LTS perl 5.30.0-9ubuntu0.5+esm3 USN-8675-1
Ubuntu Pro 18.04 LTS perl 5.26.1-6ubuntu0.7+esm3 USN-8675-1
Ubuntu Pro 16.04 LTS perl 5.22.1-9ubuntu0.9+esm3 USN-8675-1
Ubuntu Pro 14.04 LTS perl 5.18.2-2ubuntu1.7+esm8 USN-8675-1
ReleasePackageFixed inAdvisory
Red Hat Hardened Images 1 perl +6 4:5.42.2-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-AutoSplit +1 5.74-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-B 1.89-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Benchmark +1 1.27-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Class-Struct 0.68-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-DBM_Filter 0.07-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Devel-Peek 1.36-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Devel-SelfStubber 1.06-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-DynaLoader 1.57-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-English +1 1.11-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Errno 1.38-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-ExtUtils-Constant 0.25-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Fcntl +1 1.20-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-File-Basename 2.86-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-File-Compare 1.100.800-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-File-Copy 2.41-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-File-DosGlob 1.12-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-File-Find 1.44-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-File-stat +3 1.14-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-FileHandle 2.05-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-FindBin 1.54-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-GDBM_File 1:1.24-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Hash-Util 0.32-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-I18N-LangTags 0.45-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-I18N-Langinfo 0.24-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-IO 1.55-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-IPC-Open3 1.24-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Locale-Maketext-Simple 1:0.21-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Math-Complex 1.63-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Memoize +1 1.17-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Module-Loaded 1:0.08-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-NDBM_File 1.18-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-NEXT 0.69-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Net +3 1.04-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Opcode 1.69-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-POSIX 2.23-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Pod-Html +1 1.35-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Safe 2.47-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Search-Dict 1.08-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-SelectSaver +2 1.02-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-SelfLoader 1.28-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Symbol 1.09-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Sys-Hostname 1.25-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Term-Complete 1.403-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Test 1.31-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Thread 3.06-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Thread-Semaphore 2.13-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Tie 4.6-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Tie-Memoize 1.1-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Time-Piece 1.3600-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-Unicode-UCD 0.81-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-base +2 2.27-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-blib 1.07-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-debugger 1.60-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-deprecate 0.04-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-encoding-warnings 0.14-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-filetest +1 1.03-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-if 0.61.000-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-less +1 0.03-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-lib 0.65-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-mro 1.29-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-open +1 1.13-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-overload +1 1.40-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-overloading 0.02-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-ph +3 5.42.2-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-sigtrap +2 1.10-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-sort 2.06-524.3.hum1 RHSA-2026:39997
Red Hat Hardened Images 1 perl-vars +2 1.05-524.3.hum1 RHSA-2026:39997
ReleasePackageFixed inAdvisory
SLES 15 SP7 perl 5.26.1-150300.17.23.1 SUSE-SU-2026:3558-1
SLES 15 SP6 perl 5.26.1-150300.17.23.1 SUSE-SU-2026:3558-1
SLES 15 SP5 perl 5.26.1-150300.17.23.1 SUSE-SU-2026:3558-1
SLES 15 SP4 perl 5.26.1-150300.17.23.1 SUSE-SU-2026:3558-1
SLES 12 SP5 perl 5.18.2-12.35.1 SUSE-SU-2026:3540-1
Show 13 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES for SAP 16.0 perl 5.42.0-160000.3.1 SUSE-SU-2026:22847-1
SLES for SAP 15 SP6 perl 5.26.1-150300.17.23.1 SUSE-SU-2026:3558-1
SLES for SAP 15 SP5 perl 5.26.1-150300.17.23.1 SUSE-SU-2026:3558-1
SLES for SAP 15 SP4 perl 5.26.1-150300.17.23.1 SUSE-SU-2026:3558-1
SLES 16.0 perl 5.42.0-160000.3.1 SUSE-SU-2026:22847-1
SLE Micro 6.2 perl 5.42.0-160000.3.1 SUSE-SU-2026:22929-1
SLE Micro 6.1 perl 5.38.2-slfo.1.1_3.1 SUSE-SU-2026:23075-1
SLE Micro 6.0 perl 5.38.2-5.1 SUSE-SU-2026:23008-1
SLE Micro 5.5 perl 5.26.1-150300.17.23.1 SUSE-SU-2026:3558-1
SLE Micro 5.4 perl 5.26.1-150300.17.23.1 SUSE-SU-2026:3558-1
SLE Micro 5.3 perl 5.26.1-150300.17.23.1 SUSE-SU-2026:3558-1
SLE HPC 15 SP5 perl 5.26.1-150300.17.23.1 SUSE-SU-2026:3558-1
SLE HPC 15 SP4 perl 5.26.1-150300.17.23.1 SUSE-SU-2026:3558-1
ReleasePackageFixed inAdvisory
openSUSE Leap 16.0 perl 5.42.0-160000.3.1 openSUSE-SU-2026:21411-1
ReleasePackageFixed inAdvisory
Alpine v3.24 perl 5.42.3-r0 —

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 perl +6 4:5.32.1-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Attribute-Handlers 1.01-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-AutoSplit +1 5.74-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-B 1.80-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Class-Struct 0.66-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-DBM_Filter 0.06-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Devel-Peek 1.28-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-DynaLoader 1.47-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-English +1 1.11-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Errno 1.30-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-ExtUtils-Constant 0.25-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-ExtUtils-Embed 1.35-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Fcntl +1 1.13-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-File-Basename 2.85-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-File-Compare 1.100.600-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-File-Copy 2.34-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-File-Find +1 1.37-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-FileCache 1.10-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-FileHandle 2.03-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-FindBin 1.51-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-GDBM_File 1.18-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Hash-Util 0.23-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Hash-Util-FieldHash 1.20-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-I18N-LangTags 0.44-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-I18N-Langinfo 0.19-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-IO 1.43-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-IPC-Open3 1.21-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Locale-Maketext-Simple 1:0.21-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Math-Complex 1.59-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Module-Loaded 1:0.08-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-NDBM_File 1.15-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-NEXT 0.67-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Net +3 1.02-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-ODBM_File 1.16-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Opcode 1.48-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-POSIX 1.94-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Pod-Html 1.25-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Safe 2.41-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-SelfLoader 1.26-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Symbol 1.08-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Term-Complete 1.403-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Term-ReadLine 1.17-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Test +1 1.31-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Thread 3.05-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Thread-Semaphore 2.13-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Tie 4.6-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Tie-File +1 1.06-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Tie-Memoize 1.1-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Time +4 1.03-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Time-Piece 1.3401-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-Unicode-UCD 0.75-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-base +2 2.27-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-blib +1 1.07-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-debugger 1.56-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-deprecate 0.04-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-encoding-warnings 0.13-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-if 0.60.800-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-less +1 0.03-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-lib 0.65-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-locale +3 1.09-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-mro +2 1.23-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-open +2 1.12-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-overloading 0.02-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-ph +3 5.32.1-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-sort 2.04-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-vars +1 1.05-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2023 perl-vmsish 1.04-477.amzn2023.0.10 ALAS2023-2026-3211
Amazon Linux 2 perl +4 4:5.16.3-299.amzn2.0.5 ALAS2-2026-3997
Amazon Linux 2 perl-CPAN 1.9800-299.amzn2.0.5 ALAS2-2026-3997
Amazon Linux 2 perl-ExtUtils-CBuilder 1:0.28.2.6-299.amzn2.0.5 ALAS2-2026-3997
Amazon Linux 2 perl-ExtUtils-Embed 1.30-299.amzn2.0.5 ALAS2-2026-3997
Amazon Linux 2 perl-ExtUtils-Install 1.58-299.amzn2.0.5 ALAS2-2026-3997
Amazon Linux 2 perl-IO-Zlib 1:1.10-299.amzn2.0.5 ALAS2-2026-3997
Amazon Linux 2 perl-Locale-Maketext-Simple 1:0.21-299.amzn2.0.5 ALAS2-2026-3997
Amazon Linux 2 perl-Module-CoreList 1:2.76.02-299.amzn2.0.5 ALAS2-2026-3997
Amazon Linux 2 perl-Module-Loaded 1:0.08-299.amzn2.0.5 ALAS2-2026-3997
Amazon Linux 2 perl-Object-Accessor 1:0.42-299.amzn2.0.5 ALAS2-2026-3997
Amazon Linux 2 perl-Package-Constants 1:0.02-299.amzn2.0.5 ALAS2-2026-3997
Amazon Linux 2 perl-Pod-Escapes 1:1.04-299.amzn2.0.5 ALAS2-2026-3997
Amazon Linux 2 perl-Time-Piece 1.20.1-299.amzn2.0.5 ALAS2-2026-3997
Amazon Linux 2 perl-core 5.16.3-299.amzn2.0.5 ALAS2-2026-3997

Azure Linux

ReleasePackageFixed inAdvisory
Azure Linux 3 perl 5.38.2-514 —

Wolfi

ReleasePackageFixed inAdvisory
Wolfi rolling perl +4 5.44.0-r0 —

Advisories 15

References