pcre2: Fix of 4 CVEs
- CVE-2026-89161: leak and later invalid free of a copied subject when pcre2_jit_match() reuses a match data block previously used with PCRE2_COPY_MATCHED_SUBJECT (upstream fb466796) - CVE-2026-89156: out-of-bounds read in pcre2_match() on invalid UTF subjects when JIT fallback to the interpreter skipped the UTF validation (upstream dfa2ad86) - CVE-2026-89157: out-of-bounds heap write in pcre2_pattern_convert() from an overflowed output allocation size with large patterns on 32-bit size_t (upstream 41e7f679) - CVE-2026-89158: out-of-bounds heap write in pcre2_compile_32() from integer overflows in the compiled pattern length computation on 32-bit platforms (upstream 3d7dcbfc)
- Products
- pcre2, pcre2-devel, pcre2-static, pcre2-syntax, pcre2-tools, pcre2-utf16, pcre2-utf32
- Affected versions
- Not specified
- Fixed versions
- 10.40-6.el9.tuxcare.els2
- CVEs
- CVE-2026-89156, CVE-2026-89157, CVE-2026-89158, CVE-2026-89161
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:50 UTC · Revision 1
Source evidence
- CVE-2026-89161: leak and later invalid free of a copied subject when pcre2_jit_match() reuses a match data block previously used with PCRE2_COPY_MATCHED_SUBJECT (upstream fb466796) - CVE-2026-89156: out-of-bounds read in pcre2_match() on invalid UTF subjects when JIT fallback to the interpreter skipped the UTF validation (upstream dfa2ad86) - CVE-2026-89157: out-of-bounds heap write in pcre2_pattern_convert() from an overflowed output allocation size with large patterns on 32-bit size_t (upstream 41e7f679) - CVE-2026-89158: out-of-bounds heap write in pcre2_compile_32() from integer overflows in the compiled pattern length computation on 32-bit platforms (upstream 3d7dcbfc)
osv:CLSA-2026-1789573344
pcre2
Fixed versions: 10.40-6.el9.tuxcare.els2
pcre2-devel
Fixed versions: 10.40-6.el9.tuxcare.els2
pcre2-static
Fixed versions: 10.40-6.el9.tuxcare.els2
pcre2-syntax
Fixed versions: 10.40-6.el9.tuxcare.els2
pcre2-tools
Fixed versions: 10.40-6.el9.tuxcare.els2
pcre2-utf16
Fixed versions: 10.40-6.el9.tuxcare.els2
pcre2-utf32
Fixed versions: 10.40-6.el9.tuxcare.els2
Complete source record
{
"id": "7db2bbe7acbac9741443ce170333a1c99c643fa9acdead8f4023e0a5b69abf12",
"url": "https://osv.dev/vulnerability/CLSA-2026-1789573344",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "pcre2: Fix of 4 CVEs",
"summary": "- CVE-2026-89161: leak and later invalid free of a copied subject when pcre2_jit_match() reuses a match data block previously used with PCRE2_COPY_MATCHED_SUBJECT (upstream fb466796) - CVE-2026-89156: out-of-bounds read in pcre2_match() on invalid UTF subjects when JIT fallback to the interpreter skipped the UTF validation (upstream dfa2ad86) - CVE-2026-89157: out-of-bounds heap write in pcre2_pattern_convert() from an overflowed output allocation size with large patterns on 32-bit size_t (upstream 41e7f679) - CVE-2026-89158: out-of-bounds heap write in pcre2_compile_32() from integer overflows in the compiled pattern length computation on 32-bit platforms (upstream 3d7dcbfc)",
"evidence": "osv:CLSA-2026-1789573344",
"products": [
{
"name": {
"value": "pcre2",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "10.40-6.el9.tuxcare.els2",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "pcre2-devel",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "10.40-6.el9.tuxcare.els2",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "pcre2-static",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "10.40-6.el9.tuxcare.els2",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "pcre2-syntax",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "10.40-6.el9.tuxcare.els2",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "pcre2-tools",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "10.40-6.el9.tuxcare.els2",
"evidence": "/affected/4/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "pcre2-utf16",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "10.40-6.el9.tuxcare.els2",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "pcre2-utf32",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "10.40-6.el9.tuxcare.els2",
"evidence": "/affected/6/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1789573344",
"aliases": [
"CLSA-2026-1789573344"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "10.40-6.el9.tuxcare.els2"
}
]
}
],
"package": {
"name": "pcre2",
"purl": "pkg:rpm/tuxcare/pcre2?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1789573344.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "10.40-6.el9.tuxcare.els2"
}
]
}
],
"package": {
"name": "pcre2-devel",
"purl": "pkg:rpm/tuxcare/pcre2-devel?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1789573344.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "10.40-6.el9.tuxcare.els2"
}
]
}
],
"package": {
"name": "pcre2-static",
"purl": "pkg:rpm/tuxcare/pcre2-static?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1789573344.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "10.40-6.el9.tuxcare.els2"
}
]
}
],
"package": {
"name": "pcre2-syntax",
"purl": "pkg:rpm/tuxcare/pcre2-syntax?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1789573344.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "10.40-6.el9.tuxcare.els2"
}
]
}
],
"package": {
"name": "pcre2-tools",
"purl": "pkg:rpm/tuxcare/pcre2-tools?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1789573344.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "10.40-6.el9.tuxcare.els2"
}
]
}
],
"package": {
"name": "pcre2-utf16",
"purl": "pkg:rpm/tuxcare/pcre2-utf16?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1789573344.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "10.40-6.el9.tuxcare.els2"
}
]
}
],
"package": {
"name": "pcre2-utf32",
"purl": "pkg:rpm/tuxcare/pcre2-utf32?distro=almalinux-9.6",
"ecosystem": "TuxCare:AlmaLinux:9.6"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/almalinux9.6esu/CLSA-2026-1789573344.json"
}
}
],
"modified": "2026-10-26T09:43:31.618942275Z",
"provider": "osv",
"upstream": [
"CVE-2026-89156",
"CVE-2026-89157",
"CVE-2026-89158",
"CVE-2026-89161"
],
"references": [
"https://errata.tuxcare.com/els_os/tuxcare9.6esu/CLSA-2026-1789573344.html",
"https://nvd.nist.gov/vuln/detail/CVE-2026-89156",
"https://nvd.nist.gov/vuln/detail/CVE-2026-89157",
"https://nvd.nist.gov/vuln/detail/CVE-2026-89158",
"https://nvd.nist.gov/vuln/detail/CVE-2026-89161"
]
},
"related_cves": [
{
"value": "CVE-2026-89156",
"evidence": "/upstream"
},
{
"value": "CVE-2026-89157",
"evidence": "/upstream"
},
{
"value": "CVE-2026-89158",
"evidence": "/upstream"
},
{
"value": "CVE-2026-89161",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 449975,
"published_at": "2026-09-16T15:42:35+00:00"
}