The xz_head function in xzlib.c in libxml2 before 2.9.6 allows remote attackers to cause a denial of service (memory consumption) via a crafted LZMA file, because the decoder functionality does not restrict memory usage to what is required for a legitimate file.
Fix
Patch, vendor advisory and mitigation references on NVD 2
- https://git.gnome.org/browse/libxml2/commit/?id=e2a9122b8dde53d320750451e9907a7dcb2ca8bb Patch, Vendor Advisory
- https://git.gnome.org/browse/libxml2/commit/?id=e2a9122b8dde53d320750451e9907a7dcb2ca8bb Patch, Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 6.5 · xmlsoftNVD modified 2026-10-14 07:16
Affected (CPE criteria) 1
cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*
References 13
- https://git.gnome.org/browse/libxml2/commit/?id=e2a9122b8dde53d320750451e9907a7dcb2ca8bb Patch, Vendor Advisory
- https://kc.mcafee.com/corporate/index?page=content&id=SB10284
- https://lists.debian.org/debian-lts-announce/2018/09/msg00035.html
- https://lists.debian.org/debian-lts-announce/2020/09/msg00009.html
- https://security.netapp.com/advisory/ntap-20190719-0001/
- https://usn.ubuntu.com/3739-1/
- https://git.gnome.org/browse/libxml2/commit/?id=e2a9122b8dde53d320750451e9907a7dcb2ca8bb Patch, Vendor Advisory
- https://kc.mcafee.com/corporate/index?page=content&id=SB10284
- https://lists.debian.org/debian-lts-announce/2018/09/msg00035.html
- https://lists.debian.org/debian-lts-announce/2020/09/msg00009.html
- https://security.netapp.com/advisory/ntap-20190719-0001/
- https://usn.ubuntu.com/3739-1/
- https://cert-portal.siemens.com/productcert/html/ssa-398330.html