{"id":"EUVD-2026-64850","revision":"1ad1e57404fe40a4bb07228b7928fdcb","records":[{"revision":"1ad1e57404fe40a4bb07228b7928fdcb","observedAt":"2026-11-01T12:04:12.009+00:00","statement":{"source":"euvd","id":"EUVD-2026-64850","aliases":["CVE-2026-76844","GHSA-p3f5-w63m-mxph","GHSA-g84c-rxfj-3j2c"],"title":"zlib 1.2.11 through 1.3.2 contains a heap buffer overflow: after an underlying write() fails, gz_write() returns without resetting strm.next_in, leaving it pointed at the caller's buffer. A later gz* write call then derives a position from …","description":"zlib 1.2.11 through 1.3.2 contains a heap buffer overflow: after an underlying write() fails, gz_write() returns without resetting strm.next_in, leaving it pointed at the caller's buffer. A later gz* write call then derives a position from the stale pointer and writes past a heap allocation; any write() failure reaches it, including EPIPE on a blocking descriptor, and in versions before 1.3.1.2 the failed write must be followed by a gzclearerr() call.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N","score":8.3,"severity":null}],"references":["https://gist.github.com/thesmartshadow/e0b9481792afb7c31e86fee1ff084490","https://github.com/madler/zlib/commit/df84af25dc1942490e1d1c899a07619152a46148","https://github.com/madler/zlib/blob/v1.3.2/gzwrite.c#L393","https://github.com/madler/zlib","https://www.vulncheck.com/advisories/zlib-1.3.1.2-through-1.3.2-heap-buffer-overflow-via-gz-vacate"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-64850","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Aug 24, 2026, 1:12:01 PM","dateUpdated":"Oct 1, 2026, 11:03:59 AM"},"relatedAdvisories":[{"id":"msrc_CVE-2026-76844","title":"zlib 1.2.11 through 1.3.2 Heap Buffer Overflow via Stale gzwrite Pointer After Failed Write","vulnerabilityIds":["CVE-2026-76844"]},{"id":"RHSA-2026:92510","title":"Red Hat Security Advisory: RHOAI 3.4.6 - Red Hat OpenShift AI","vulnerabilityIds":["CVE-2023-54404","CVE-2026-11822","CVE-2026-11824","CVE-2026-13717","CVE-2026-16221","CVE-2026-17106","CVE-2026-18446","CVE-2026-25681","CVE-2026-26007","CVE-2026-27136","CVE-2026-33814","CVE-2026-33818","CVE-2026-39821","CVE-2026-39834","CVE-2026-41178","CVE-2026-42502","CVE-2026-45819","CVE-2026-45820","CVE-2026-56853","CVE-2026-56858","CVE-2026-56859","CVE-2026-56860","CVE-2026-56862","CVE-2026-57516","CVE-2026-59951","CVE-2026-63209","CVE-2026-63374","CVE-2026-65898","CVE-2026-67312","CVE-2026-67314","CVE-2026-67320","CVE-2026-67321","CVE-2026-69097","CVE-2026-69153","CVE-2026-73086","CVE-2026-73088","CVE-2026-73089","CVE-2026-73643","CVE-2026-75838","CVE-2026-75899","CVE-2026-75931","CVE-2026-75975","CVE-2026-76172","CVE-2026-76844","CVE-2026-77301","CVE-2026-78679","CVE-2026-82397","CVE-2026-83663","CVE-2026-84375","CVE-2026-84445","CVE-2026-85393","CVE-2026-85525","CVE-2026-87018","CVE-2026-90711","CVE-2026-91990","CVE-2026-92599","CVE-2026-93690","CVE-2026-93749","CVE-2026-94637","CVE-2026-96640","CVE-2026-96643","CVE-2026-96644","CVE-2026-96778","CVE-2026-96804","CVE-2026-97687","CVE-2026-97689","CVE-2026-102267","CVE-2026-102271","CVE-2026-102272","CVE-2026-102276","CVE-2026-102278","CVE-2026-102282","CVE-2026-104150","CVE-2026-104851","CVE-2026-105922","CVE-2026-106445","CVE-2026-106446","CVE-2026-109156","CVE-2026-109383","CVE-2026-109527","CVE-2026-109829","CVE-2026-109869","CVE-2026-109956","CVE-2026-110856","CVE-2026-110857","CVE-2026-110858","CVE-2026-110859","CVE-2026-111064","CVE-2026-111066","CVE-2026-111497","CVE-2026-112390","CVE-2026-112391","CVE-2026-112392","CVE-2026-112397","CVE-2026-112399","CVE-2026-112400","CVE-2026-112402","CVE-2026-112404","CVE-2026-112405","CVE-2026-112893","CVE-2026-112894","CVE-2026-112895","CVE-2026-112896","CVE-2026-112897","CVE-2026-112940","CVE-2026-114145"]},{"id":"RHSA-2026:61783","title":"Red Hat Security Advisory: A Subscription Management tool for finding and reporting Red Hat product usage","vulnerabilityIds":["CVE-2024-29180","CVE-2026-1965","CVE-2026-3783","CVE-2026-5704","CVE-2026-6322","CVE-2026-6653","CVE-2026-8286","CVE-2026-9547","CVE-2026-11822","CVE-2026-11824","CVE-2026-11979","CVE-2026-14164","CVE-2026-15588","CVE-2026-18477","CVE-2026-18508","CVE-2026-41991","CVE-2026-41992","CVE-2026-45409","CVE-2026-45623","CVE-2026-54284","CVE-2026-54371","CVE-2026-56434","CVE-2026-58010","CVE-2026-58011","CVE-2026-58012","CVE-2026-58013","CVE-2026-58014","CVE-2026-58015","CVE-2026-58055","CVE-2026-59868","CVE-2026-59869","CVE-2026-59893","CVE-2026-60005","CVE-2026-67213","CVE-2026-67214","CVE-2026-71491","CVE-2026-73643","CVE-2026-75899","CVE-2026-75931","CVE-2026-75975","CVE-2026-76172","CVE-2026-76844"]},{"id":"RHSA-2026:68681","title":"Red Hat Security Advisory: Migration Toolkit for Containers (MTC) 1.8.17 update","vulnerabilityIds":["CVE-2026-14257","CVE-2026-16221","CVE-2026-27145","CVE-2026-33186","CVE-2026-33818","CVE-2026-42504","CVE-2026-56852","CVE-2026-56853","CVE-2026-56859","CVE-2026-56860","CVE-2026-56862","CVE-2026-59869","CVE-2026-59873","CVE-2026-59874","CVE-2026-67313","CVE-2026-67314","CVE-2026-67320","CVE-2026-67321","CVE-2026-69152","CVE-2026-69192","CVE-2026-73088","CVE-2026-73089","CVE-2026-73566","CVE-2026-73643","CVE-2026-73646","CVE-2026-75899","CVE-2026-75931","CVE-2026-75975","CVE-2026-76172","CVE-2026-76844","CVE-2026-82417","CVE-2026-84292","CVE-2026-84375","CVE-2026-84394"]},{"id":"RHSA-2026:69296","title":"Red Hat Security Advisory: Red Hat Data Grid 8.6.3 security update","vulnerabilityIds":["CVE-2026-44891","CVE-2026-49978","CVE-2026-55831","CVE-2026-55833","CVE-2026-55851","CVE-2026-56745","CVE-2026-56746","CVE-2026-56817","CVE-2026-56819","CVE-2026-56820","CVE-2026-59296","CVE-2026-59899","CVE-2026-59901","CVE-2026-62243","CVE-2026-68494","CVE-2026-73508","CVE-2026-76844"]}],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-64850","identifiers":["EUVD-2026-64850","CVE-2026-76844","GHSA-p3f5-w63m-mxph","GHSA-g84c-rxfj-3j2c"]},"retained":false,"historicalAffected":[]}],"coverage":[]}