UnratedFix available
zlib: Fix of CVE-2026-76844
Type: advisorySources: OSV
- CVE-2026-76844: reset strm.next_in and strm.avail_in in gz_write() when a direct write fails, so a later gzwrite() after gzclearerr() cannot copy past the input buffer
- Products
- zlib, zlib-devel, zlib-static
- Affected versions
- Not specified
- Fixed versions
- 1.2.11-17.el8.tuxcare.els4
- CVEs
- CVE-2026-76844
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 11:17 UTC · Revision 1
Source evidence
- CVE-2026-76844: reset strm.next_in and strm.avail_in in gz_write() when a direct write fails, so a later gzwrite() after gzclearerr() cannot copy past the input buffer
osv:CLSA-2026-1791916248
zlib
Fixed versions: 1.2.11-17.el8.tuxcare.els4
zlib-devel
Fixed versions: 1.2.11-17.el8.tuxcare.els4
zlib-static
Fixed versions: 1.2.11-17.el8.tuxcare.els4
Complete source record
{
"id": "a172c205aa98a126eacea9c0db332979621b593e8fce684bd4c064a5d9780cb9",
"url": "https://osv.dev/vulnerability/CLSA-2026-1791916248",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "zlib: Fix of CVE-2026-76844",
"summary": "- CVE-2026-76844: reset strm.next_in and strm.avail_in in gz_write() when a direct write fails, so a later gzwrite() after gzclearerr() cannot copy past the input buffer",
"evidence": "osv:CLSA-2026-1791916248",
"products": [
{
"name": {
"value": "zlib",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.2.11-17.el8.tuxcare.els4",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "zlib-devel",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.2.11-17.el8.tuxcare.els4",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": []
},
{
"name": {
"value": "zlib-static",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.2.11-17.el8.tuxcare.els4",
"evidence": "/affected/2/ranges"
}
],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "CLSA-2026-1791916248",
"aliases": [
"CLSA-2026-1791916248"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.2.11-17.el8.tuxcare.els4"
}
]
}
],
"package": {
"name": "zlib",
"purl": "pkg:rpm/tuxcare/zlib?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2026-1791916248.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.2.11-17.el8.tuxcare.els4"
}
]
}
],
"package": {
"name": "zlib-devel",
"purl": "pkg:rpm/tuxcare/zlib-devel?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2026-1791916248.json"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.2.11-17.el8.tuxcare.els4"
}
]
}
],
"package": {
"name": "zlib-static",
"purl": "pkg:rpm/tuxcare/zlib-static?distro=centos-8.5",
"ecosystem": "TuxCare:CentOS:8.5"
},
"database_specific": {
"source": "https://github.com/cloudlinux/tuxcare-osv/tree/main/data/els_os/centos8.5els/CLSA-2026-1791916248.json"
}
}
],
"modified": "2026-10-26T09:31:51.921632231Z",
"provider": "osv",
"upstream": [
"CVE-2026-76844"
],
"references": [
"https://errata.tuxcare.com/els_os/centos8.5els/CLSA-2026-1791916248.html",
"https://nvd.nist.gov/vuln/detail/CVE-2026-76844"
]
},
"related_cves": [
{
"value": "CVE-2026-76844",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 448739,
"published_at": "2026-10-13T18:30:58+00:00"
}