CVE catalog
CVE-2026-12087
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
- Severity
- Critical · CVSS 9.1
- Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.37% · Oct 23, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | perl | sid | 5.42.3-1 | fixed |
| Debian | perl | forky | 5.42.3-1 | fixed |
| Debian | perl | trixie | 5.40.1-6+deb13u1 | fixed |
| Debian | perl | bookworm | 5.36.0-7+deb12u3 | vulnerable |
| Debian | perl | bookworm-security | 5.36.0-7+deb12u4 | fixed |
| Debian | libsocket-perl | sid | 2.043-1 | fixed |
| Debian | libsocket-perl | forky | 2.043-1 | fixed |
| Debian | libsocket-perl | trixie | 2.038-1+deb13u1 | fixed |
| Debian | libsocket-perl | bookworm | 2.036-1 | vulnerable |
| Cpe | libsocket-perl | Not reported | Not reported | vulnerable |
| Cpe | perl | Not reported | Not reported | vulnerable |
| Ubuntu | perl | noble | 5.38.2-3.2ubuntu0.4 | fixed |
| Ubuntu | libperl-dev | noble | 5.38.2-3.2ubuntu0.4 | fixed |
| Ubuntu | libperl5.38t64 | noble | 5.38.2-3.2ubuntu0.4 | fixed |
| Ubuntu | perl-base | noble | 5.38.2-3.2ubuntu0.4 | fixed |
| Ubuntu | perl-debug | noble | 5.38.2-3.2ubuntu0.4 | fixed |
| Ubuntu | perl-doc | noble | 5.38.2-3.2ubuntu0.4 | fixed |
| Ubuntu | perl-modules-5.38 | noble | 5.38.2-3.2ubuntu0.4 | fixed |
| Ubuntu | perl | 26.04 | 5.40.1-6build1 | vulnerable |
| Ubuntu | perl | 26.04 | 5.40.1-7build1 | vulnerable |
| Ubuntu | perl | 26.04 | 5.40.1-7ubuntu0.1 | vulnerable |
| Ubuntu | perl | 26.04 | 5.40.1-7ubuntu0.2 | vulnerable |
| Ubuntu | perl | 26.04 | 5.40.1-7ubuntu0.3 | fixed |
| Ubuntu | perl | pro | 5.28.1-6build1 | vulnerable |
| Ubuntu | perl | pro | 5.30.0-7 | vulnerable |
| Ubuntu | perl | pro | 5.30.0-9 | vulnerable |
| Ubuntu | perl | pro | 5.30.0-9build1 | vulnerable |
| Ubuntu | perl | pro | 5.30.0-9ubuntu0.2 | vulnerable |
| Ubuntu | perl | pro | 5.30.0-9ubuntu0.3 | vulnerable |
| Ubuntu | perl | pro | 5.30.0-9ubuntu0.4 | vulnerable |
| Ubuntu | perl | pro | 5.30.0-9ubuntu0.5 | vulnerable |
| Ubuntu | perl | pro | 5.30.0-9ubuntu0.5+esm2 | vulnerable |
| Ubuntu | perl | pro | 5.30.0-9ubuntu0.5+esm3 | fixed |
| Ubuntu | perl | 22.04 | 5.32.1-3ubuntu3 | vulnerable |
| Ubuntu | perl | 22.04 | 5.34.0-3ubuntu1 | vulnerable |
| Ubuntu | perl | 22.04 | 5.34.0-3ubuntu1.1 | vulnerable |
| Ubuntu | perl | 22.04 | 5.34.0-3ubuntu1.2 | vulnerable |
| Ubuntu | perl | 22.04 | 5.34.0-3ubuntu1.3 | vulnerable |
| Ubuntu | perl | 22.04 | 5.34.0-3ubuntu1.4 | vulnerable |
| Ubuntu | perl | 22.04 | 5.34.0-3ubuntu1.5 | vulnerable |
| Ubuntu | perl | 22.04 | 5.34.0-3ubuntu1.7 | vulnerable |
| Ubuntu | perl | 22.04 | 5.34.0-3ubuntu1.8 | fixed |
| Suse | perl | linux enterprise micro 5.3 | 5.26.1-150300.17.23.1 | fixed |
| Suse | perl | linux enterprise micro 5.4 | 5.26.1-150300.17.23.1 | fixed |
| Suse | perl | linux enterprise micro 5.5 | 5.26.1-150300.17.23.1 | fixed |
| Suse | perl | linux enterprise module for basesystem 15 sp7 | 5.26.1-150300.17.23.1 | fixed |
| Suse | perl | linux enterprise module for development tools 15 sp7 | 5.26.1-150300.17.23.1 | fixed |
| Suse | perl | linux enterprise module for package hub 15 sp7 | 5.26.1-150300.17.23.1 | fixed |
| Suse | perl | linux enterprise high performance computing 15 sp4-espos | 5.26.1-150300.17.23.1 | fixed |
| Suse | perl | linux enterprise high performance computing 15 sp4-ltss | 5.26.1-150300.17.23.1 | fixed |
| Suse | perl | linux enterprise high performance computing 15 sp5-espos | 5.26.1-150300.17.23.1 | fixed |
| Suse | perl | linux enterprise high performance computing 15 sp5-ltss | 5.26.1-150300.17.23.1 | fixed |
| Suse | perl | linux enterprise server 15 sp4-ltss | 5.26.1-150300.17.23.1 | fixed |
| Suse | perl | linux enterprise server 15 sp5-ltss | 5.26.1-150300.17.23.1 | fixed |
| Suse | perl | linux enterprise server 15 sp6-ltss | 5.26.1-150300.17.23.1 | fixed |
| Suse | perl | linux enterprise server for sap applications 15 sp4 | 5.26.1-150300.17.23.1 | fixed |
| Suse | perl | linux enterprise server for sap applications 15 sp5 | 5.26.1-150300.17.23.1 | fixed |
| Suse | perl | linux enterprise server for sap applications 15 sp6 | 5.26.1-150300.17.23.1 | fixed |
| Suse | perl | linux enterprise server 12 sp5-ltss | 5.18.2-12.35.1 | fixed |
| Suse | perl | linux enterprise server ltss extended security 12 sp5 | 5.18.2-12.35.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | perl | source | sid | 5.42.3-1 | not yet assigned | Not reported | [1140152] |
| Debian | perl | source | forky | 5.42.3-1 | not yet assigned | Not reported | [1140152] |
| Debian | perl | source | trixie | 5.40.1-6+deb13u1 | not yet assigned | Not reported | [1140152] |
| Debian | perl | source | bookworm | 5.36.0-7+deb12u4 | not yet assigned | Not reported | [1140152] |
| Debian | libsocket-perl | source | sid | 2.041-1 | not yet assigned | Not reported | [1146063] |
| Debian | libsocket-perl | source | forky | 2.041-1 | not yet assigned | Not reported | [1146063] |
| Debian | libsocket-perl | source | trixie | 2.038-1+deb13u1 | not yet assigned | Not reported | [1146063] |
| Debian | libsocket-perl | source | bookworm | (unfixed) | not yet assigned | Not reported | [1146063] |
| Ubuntu | perl | deb | noble | 5.38.2-3.2ubuntu0.4 | Not reported | Not reported | Not reported |
| Ubuntu | libperl-dev | deb | noble | 5.38.2-3.2ubuntu0.4 | Not reported | Not reported | Not reported |
| Ubuntu | libperl5.38t64 | deb | noble | 5.38.2-3.2ubuntu0.4 | Not reported | Not reported | Not reported |
| Ubuntu | perl-base | deb | noble | 5.38.2-3.2ubuntu0.4 | Not reported | Not reported | Not reported |
| Ubuntu | perl-debug | deb | noble | 5.38.2-3.2ubuntu0.4 | Not reported | Not reported | Not reported |
| Ubuntu | perl-doc | deb | noble | 5.38.2-3.2ubuntu0.4 | Not reported | Not reported | Not reported |
| Ubuntu | perl-modules-5.38 | deb | noble | 5.38.2-3.2ubuntu0.4 | Not reported | Not reported | Not reported |
| Ubuntu | perl | deb | 26.04 | 5.40.1-7ubuntu0.3 | Not reported | USN-8675-2 | Not reported |
| Ubuntu | perl | deb | pro | 5.30.0-9ubuntu0.5+esm3 | Not reported | USN-8675-1 | Not reported |
| Ubuntu | perl | deb | 22.04 | 5.34.0-3ubuntu1.8 | Not reported | USN-8675-1 | Not reported |
| Suse | perl | rpm | linux enterprise micro 5.3 | 5.26.1-150300.17.23.1 | Not reported | SUSE-SU-2026:3558-1 | Not reported |
| Suse | perl | rpm | linux enterprise micro 5.4 | 5.26.1-150300.17.23.1 | Not reported | SUSE-SU-2026:3558-1 | Not reported |
| Suse | perl | rpm | linux enterprise micro 5.5 | 5.26.1-150300.17.23.1 | Not reported | SUSE-SU-2026:3558-1 | Not reported |
| Suse | perl | rpm | linux enterprise module for basesystem 15 sp7 | 5.26.1-150300.17.23.1 | Not reported | SUSE-SU-2026:3558-1 | Not reported |
| Suse | perl | rpm | linux enterprise module for development tools 15 sp7 | 5.26.1-150300.17.23.1 | Not reported | SUSE-SU-2026:3558-1 | Not reported |
| Suse | perl | rpm | linux enterprise module for package hub 15 sp7 | 5.26.1-150300.17.23.1 | Not reported | SUSE-SU-2026:3558-1 | Not reported |
| Suse | perl | rpm | linux enterprise high performance computing 15 sp4-espos | 5.26.1-150300.17.23.1 | Not reported | SUSE-SU-2026:3558-1 | Not reported |
| Suse | perl | rpm | linux enterprise high performance computing 15 sp4-ltss | 5.26.1-150300.17.23.1 | Not reported | SUSE-SU-2026:3558-1 | Not reported |
| Suse | perl | rpm | linux enterprise high performance computing 15 sp5-espos | 5.26.1-150300.17.23.1 | Not reported | SUSE-SU-2026:3558-1 | Not reported |
| Suse | perl | rpm | linux enterprise high performance computing 15 sp5-ltss | 5.26.1-150300.17.23.1 | Not reported | SUSE-SU-2026:3558-1 | Not reported |
| Suse | perl | rpm | linux enterprise server 15 sp4-ltss | 5.26.1-150300.17.23.1 | Not reported | SUSE-SU-2026:3558-1 | Not reported |
| Suse | perl | rpm | linux enterprise server 15 sp5-ltss | 5.26.1-150300.17.23.1 | Not reported | SUSE-SU-2026:3558-1 | Not reported |
| Suse | perl | rpm | linux enterprise server 15 sp6-ltss | 5.26.1-150300.17.23.1 | Not reported | SUSE-SU-2026:3558-1 | Not reported |
| Suse | perl | rpm | linux enterprise server for sap applications 15 sp4 | 5.26.1-150300.17.23.1 | Not reported | SUSE-SU-2026:3558-1 | Not reported |
| Suse | perl | rpm | linux enterprise server for sap applications 15 sp5 | 5.26.1-150300.17.23.1 | Not reported | SUSE-SU-2026:3558-1 | Not reported |
| Suse | perl | rpm | linux enterprise server for sap applications 15 sp6 | 5.26.1-150300.17.23.1 | Not reported | SUSE-SU-2026:3558-1 | Not reported |
| Suse | perl | rpm | linux enterprise server 12 sp5-ltss | 5.18.2-12.35.1 | Not reported | SUSE-SU-2026:3540-1 | Not reported |
| Suse | perl | rpm | linux enterprise server ltss extended security 12 sp5 | 5.18.2-12.35.1 | Not reported | SUSE-SU-2026:3540-1 | Not reported |
[Debian bug #1140152][Debian bug #1146063]
Notes
[bookworm] libsocket-perl: Minor issue; up-to-3-byte heap over-read, only reachable when a script passes attacker-controlled source to pack_ip_mreq_source()
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [libperl5.36]Affected
Source package: [perl]
Details (4)
5.36.0-7+deb12u3· amd64 · bookwormAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u3· arm64 · bookwormAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· amd64 · bookworm-securityAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· arm64 · bookworm-securityAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
- [libperl-dev]Affected
Source package: [perl]
Details (4)
5.36.0-7+deb12u3· amd64 · bookwormAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u3· arm64 · bookwormAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· amd64 · bookworm-securityAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· arm64 · bookworm-securityAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
- [libsocket-perl]Affected
Source package: [libsocket-perl]
Details (2)
2.036-1+b1· amd64 · bookwormAffected
nvd · libsocket-perl · debian · bookworm; nvd · libsocket-perl · debian · 12
2.036-1+b1· arm64 · bookwormAffected
nvd · libsocket-perl · debian · bookworm; nvd · libsocket-perl · debian · 12
- [perl]Affected
Details (4)
5.36.0-7+deb12u3· amd64 · bookwormAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u3· arm64 · bookwormAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· amd64 · bookworm-securityAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· arm64 · bookworm-securityAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
- [perl-base]Affected
Source package: [perl]
Details (4)
5.36.0-7+deb12u3· amd64 · bookwormAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u3· arm64 · bookwormAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· amd64 · bookworm-securityAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· arm64 · bookworm-securityAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
- [perl-debug]Affected
Source package: [perl]
Details (4)
5.36.0-7+deb12u3· amd64 · bookwormAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u3· arm64 · bookwormAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· amd64 · bookworm-securityAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· arm64 · bookworm-securityAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
- [perl-doc]Affected
Source package: [perl]
Details (4)
5.36.0-7+deb12u3· all · bookwormAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u3· all · bookwormAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· all · bookworm-securityAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· all · bookworm-securityAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
- [perl-modules-5.36]Affected
Source package: [perl]
Details (4)
5.36.0-7+deb12u3· all · bookwormAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u3· all · bookwormAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· all · bookworm-securityAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
5.36.0-7+deb12u2· all · bookworm-securityAffected · Fixed:
5.36.0-7+deb12u4nvd · perl · debian · bookworm; nvd · perl · debian · 12
[Debian 13 (Trixie)]
- [libperl5.40]Affected
Source package: [perl]
Details (2)
5.40.1-6· amd64 · trixieAffected · Fixed:
5.40.1-6+deb13u1nvd · perl · debian · 13
5.40.1-6· arm64 · trixieAffected · Fixed:
5.40.1-6+deb13u1nvd · perl · debian · 13
- [libperl-dev]Affected
Source package: [perl]
Details (2)
5.40.1-6· amd64 · trixieAffected · Fixed:
5.40.1-6+deb13u1nvd · perl · debian · 13
5.40.1-6· arm64 · trixieAffected · Fixed:
5.40.1-6+deb13u1nvd · perl · debian · 13
- [libsocket-perl]Affected
Source package: [libsocket-perl]
Details (2)
2.038-1+b1· amd64 · trixieAffected · Fixed:
2.038-1+deb13u1nvd · libsocket-perl · debian · 13
2.038-1+b1· arm64 · trixieAffected · Fixed:
2.038-1+deb13u1nvd · libsocket-perl · debian · 13
- [perl]Affected
Details (2)
5.40.1-6· amd64 · trixieAffected · Fixed:
5.40.1-6+deb13u1nvd · perl · debian · 13
5.40.1-6· arm64 · trixieAffected · Fixed:
5.40.1-6+deb13u1nvd · perl · debian · 13
- [perl-base]Affected
Source package: [perl]
Details (2)
5.40.1-6· amd64 · trixieAffected · Fixed:
5.40.1-6+deb13u1nvd · perl · debian · 13
5.40.1-6· arm64 · trixieAffected · Fixed:
5.40.1-6+deb13u1nvd · perl · debian · 13
- [perl-debug]Affected
Source package: [perl]
Details (2)
5.40.1-6· amd64 · trixieAffected · Fixed:
5.40.1-6+deb13u1nvd · perl · debian · 13
5.40.1-6· arm64 · trixieAffected · Fixed:
5.40.1-6+deb13u1nvd · perl · debian · 13
- [perl-doc]Affected
Source package: [perl]
Details (2)
5.40.1-6· all · trixieAffected · Fixed:
5.40.1-6+deb13u1nvd · perl · debian · 13
5.40.1-6· all · trixieAffected · Fixed:
5.40.1-6+deb13u1nvd · perl · debian · 13
- [perl-modules-5.40]Affected
Source package: [perl]
Details (2)
5.40.1-6· all · trixieAffected · Fixed:
5.40.1-6+deb13u1nvd · perl · debian · 13
5.40.1-6· all · trixieAffected · Fixed:
5.40.1-6+deb13u1nvd · perl · debian · 13
Observed:
References
- [https://access.redhat.com/errata/RHSA-2026:11342]
- [https://ftp.suse.com/pub/projects/security/]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-12087]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-12087]
- [https://osv.dev/vulnerability/SUSE-SU-2026:3540-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:3558-1]
- [https://osv.dev/vulnerability/USN-8675-1]
- [https://osv.dev/vulnerability/USN-8675-2]
- [https://security-tracker.debian.org/tracker/CVE-2026-12087]
- [https://ubuntu.com/security/notices/USN-8684-1]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2858.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]