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ALSA-2026:61247 — Moderate: libxml2 security update

Affected: AlmaLinux:9: libxml2, AlmaLinux:9: libxml2-devel, AlmaLinux:9: python3-libxml2

The libxml2 library is a development toolbox providing the implementation of various XML standards.

Security Fix(es):

* libxml2: mingw-libxml2: libxml2: Denial of Service via crafted XML input due to use-after-free (CVE-2026-6653) * libxml2: libxml2: Arbitrary code execution in xmlcatalog utility via buffer overflow (CVE-2026-11979)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

BELL-CVE-2026-6653

Affected: Alpaquita:23: libxml2, Alpaquita:stream: libxml2, BellSoft Hardened Containers:23: libxml2, BellSoft Hardened Containers:stream: libxml2

certfr-2026-avi-1249 — De multiples vulnérabilités ont été découvertes dans les produits VMware. Elles permettent à un attaquant de provoquer…

certfr-2026-avi-1249

EUVD-2026-328936

fkie_cve-2026-6653

Use After Free in libxml2's xmlParseInternalSubset from GNOME libxml2 version 2.9.11 to 2.11.0 allows a remote attacker to cause a denial-of-service via maliciously crafted XML input with improper entity resolution handling.

GHSA-v4qw-p44r-qhfg

RHSA-2026:61247 — Red Hat Security Advisory: libxml2 security update

libxml2: mingw-libxml2: libxml2: Denial of Service via crafted XML input due to use-after-free libxml2: libxml2: Arbitrary code execution in xmlcatalog utility via buffer overflow

RHSA-2026:61783 — Red Hat Security Advisory: A Subscription Management tool for finding and reporting Red Hat product usage

webpack-dev-middleware: lack of URL validation may lead to file leak curl: curl: Authentication bypass due to incorrect connection reuse with Negotiate authentication curl: curl: Information disclosure via OAuth2 bearer token leakage during HTTP(S) redirect tar: tar: Hidden file injection via crafted archives fast-uri: fast-uri: URI authority bypass due to improper delimiter handling libxml2: mingw-libxml2: libxml2: Denial of Service via crafted XML input due to use-after-free curl: curl: Insecure connection establishment due to TLS configuration mismatch curl: curl: Man-in-the-middle attack via SSH host key bypass sqlite: SQLite: Arbitrary code execution via crafted FTS5 full-text search data sqlite: SQLite: Arbitrary code execution and crash via heap-based buffer overflow in FTS5 libxml2: libxml2: Arbitrary code execution in xmlcatalog utility via buffer overflow libarchive: Double-Free Vulnerability in RAR5 Decompression Logic via dangling filtered_buf pointer in init_unpack() GDBusServer: glib2: GDBusServer pre-authentication DoS via unbounded SASL line buffering tar: tar: TOCTOU in incremental dumpdir 'X' rename handling allows restore path escape tar: tar: --one-top-level hardlink targets not confined to top-level directory enabling arbitrary file overwrite gzip: gzip: Arbitrary file overwrite via insecure temporary file handling in gzexe utility gzip: gzip: Information disclosure via global buffer overflow in LZH decompression python-idna: idna: Denial of Service via…

RLSA-2026:61247 — Moderate: libxml2 security update

Affected: Rocky Linux:9: libxml2

The libxml2 library is a development toolbox providing the implementation of various XML standards.

Security Fix(es):

* libxml2: mingw-libxml2: libxml2: Denial of Service via crafted XML input due to use-after-free (CVE-2026-6653)

* libxml2: libxml2: Arbitrary code execution in xmlcatalog utility via buffer overflow (CVE-2026-11979)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

UBUNTU-CVE-2026-6653

Affected: Ubuntu:22.04:LTS: libxml2, Ubuntu:24.04:LTS: libxml2

WID-SEC-W-2026-2037 — libxml2: Schwachstelle ermöglicht Denial of Service

Ein entfernter, anonymer Angreifer kann eine Schwachstelle in libxml2 ausnutzen, um einen Denial of Service Angriff durchzuführen.