- Issued:
- 2026-11-02
- Updated:
- 2026-11-02
RHSA-2026:93791 - Security Advisory
Synopsis
Important: libxml2 security update
Type/Severity
Security Advisory: Important
Red Hat Lightspeed patch analysis
Identify and remediate systems affected by this advisory.
Topic
An update for libxml2 is now available for Red Hat Enterprise Linux 7 Extended Lifecycle Support.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Description
The libxml2 library is a development toolbox providing the implementation of various XML standards.
Security Fix(es):
- libxml2: libxml2: Arbitrary code execution via heap-based buffer overflow (CVE-2026-86138)
- libxml2: libxml2: Data integrity issues due to integer overflow in write callbacks (CVE-2026-86143)
- libxml2: libxml2: Arbitrary code execution via stack-based buffer overflow in xmlSnprintfElements (CVE-2026-86140)
- libxml2: libxml2: Heap-based buffer overflow in xmlXPtrEval due to xpointer length saturation (CVE-2026-86142)
- libxml2: libxml2: Information disclosure, SSRF, or denial of service due to improper parseFlags propagation. (CVE-2026-86144)
- libxml2: double-free/UAF in libxml2 Python bindings (CVE-2026-74860)
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.
Solution
For details on how to apply this update, which includes the changes described in this advisory, refer to:
Affected Products
- Red Hat Enterprise Linux Server - Extended Life Cycle Support 7 x86_64
- Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 7 s390x
- Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian 7 ppc64
- Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, little endian 7 ppc64le
Fixes
- BZ - 2528986 - CVE-2026-86138 libxml2: libxml2: Arbitrary code execution via heap-based buffer overflow
- BZ - 2528987 - CVE-2026-86143 libxml2: libxml2: Data integrity issues due to integer overflow in write callbacks
- BZ - 2528989 - CVE-2026-86140 libxml2: libxml2: Arbitrary code execution via stack-based buffer overflow in xmlSnprintfElements
- BZ - 2528990 - CVE-2026-86142 libxml2: libxml2: Heap-based buffer overflow in xmlXPtrEval due to xpointer length saturation
- BZ - 2528992 - CVE-2026-86144 libxml2: libxml2: Information disclosure, SSRF, or denial of service due to improper parseFlags propagation.
- BZ - 2529697 - CVE-2026-74860 libxml2: double-free/UAF in libxml2 Python bindings
Note:
More recent versions of these packages may be available.
Click a package name for more details.
Red Hat Enterprise Linux Server - Extended Life Cycle Support 7
| SRPM | |
|---|---|
| libxml2-2.9.1-6.el7_9.20.src.rpm | SHA-256: bfd1d555ce4bb496f5bbd4e1bf254050c38ff03a598f1aeb8a9a617f5e2ff0fb |
| x86_64 | |
| libxml2-2.9.1-6.el7_9.20.i686.rpm | SHA-256: 59b82e958e9584c32cb7130ea9e0f80dbbac62cbd51025172964192f45db5474 |
| libxml2-2.9.1-6.el7_9.20.x86_64.rpm | SHA-256: 57d79a2647e39e9b67e7fe6f0522911a441585e65c66141e0763c15685187e0c |
| libxml2-debuginfo-2.9.1-6.el7_9.20.i686.rpm | SHA-256: 5b29080a37d1a3a79ed248a914fa8454d7c8576a51784408c594ba1e4cb8ccd3 |
| libxml2-debuginfo-2.9.1-6.el7_9.20.i686.rpm | SHA-256: 5b29080a37d1a3a79ed248a914fa8454d7c8576a51784408c594ba1e4cb8ccd3 |
| libxml2-debuginfo-2.9.1-6.el7_9.20.x86_64.rpm | SHA-256: b2e762f2dabde1deb496c47a7832d5609b77228e2c628e6a16afe4464ed34896 |
| libxml2-debuginfo-2.9.1-6.el7_9.20.x86_64.rpm | SHA-256: b2e762f2dabde1deb496c47a7832d5609b77228e2c628e6a16afe4464ed34896 |
| libxml2-devel-2.9.1-6.el7_9.20.i686.rpm | SHA-256: afdb40bd17e261b0f1ed664ca5d8b0bbc75cd214c1fbbe82954a37b83a388eb1 |
| libxml2-devel-2.9.1-6.el7_9.20.x86_64.rpm | SHA-256: 940be8bec596b06bbff2b2365e1877de9d63b6e54f849a83512833c665e17966 |
| libxml2-python-2.9.1-6.el7_9.20.x86_64.rpm | SHA-256: f1af5ec3f230e5407bf97fa1c6a98c125e435a6e15b0f0f5facd28281eb90f2a |
| libxml2-static-2.9.1-6.el7_9.20.i686.rpm | SHA-256: add5a5eff25840b9132ac461a3ec35634fe1476646f48a14db6fb9af46cd8e98 |
| libxml2-static-2.9.1-6.el7_9.20.x86_64.rpm | SHA-256: 2fa32869d05de0a7969d3189d72644018c93c131957ab3368128e645ffb1250a |
Red Hat Enterprise Linux Server - Extended Life Cycle Support (for IBM z Systems) 7
| SRPM | |
|---|---|
| libxml2-2.9.1-6.el7_9.20.src.rpm | SHA-256: bfd1d555ce4bb496f5bbd4e1bf254050c38ff03a598f1aeb8a9a617f5e2ff0fb |
| s390x | |
| libxml2-2.9.1-6.el7_9.20.s390.rpm | SHA-256: f4b4156dc8ab4596036d9c48c9a22ae48ee9225de204a67eb172465a482a54f4 |
| libxml2-2.9.1-6.el7_9.20.s390x.rpm | SHA-256: d6bcb613a2f0fdf78b3ec9c5f210c338de7fc0e5e635dd8bc9a0ecf478118a34 |
| libxml2-debuginfo-2.9.1-6.el7_9.20.s390.rpm | SHA-256: 9f4aa4175e3df16e0774b33c098942518b1dc60989c7ef7c5139c26478d57e46 |
| libxml2-debuginfo-2.9.1-6.el7_9.20.s390.rpm | SHA-256: 9f4aa4175e3df16e0774b33c098942518b1dc60989c7ef7c5139c26478d57e46 |
| libxml2-debuginfo-2.9.1-6.el7_9.20.s390x.rpm | SHA-256: 87de3178b5b0db6bfe6a58e5fd2f627c3d5cc2bc5715b8ca75aed8fe5d8e6abc |
| libxml2-debuginfo-2.9.1-6.el7_9.20.s390x.rpm | SHA-256: 87de3178b5b0db6bfe6a58e5fd2f627c3d5cc2bc5715b8ca75aed8fe5d8e6abc |
| libxml2-devel-2.9.1-6.el7_9.20.s390.rpm | SHA-256: 7631438078f415cf58b100acfe9f47667ee0ee3aedb02dcac949dcf38d0175d6 |
| libxml2-devel-2.9.1-6.el7_9.20.s390x.rpm | SHA-256: 93157fc8035cbeec60e21cc1835b55fa8b22f93ed893078b234e748ecf0b1d76 |
| libxml2-python-2.9.1-6.el7_9.20.s390x.rpm | SHA-256: 2ff6030e9e95f5a78c299645e3d7853686c55b707021a6647327fa0af9a10755 |
| libxml2-static-2.9.1-6.el7_9.20.s390.rpm | SHA-256: 79631f231baccd1f4b6516fe37b07d7136cbd260bb67f886592a92eb7e7fe534 |
| libxml2-static-2.9.1-6.el7_9.20.s390x.rpm | SHA-256: ed569438011a31ca4e422895e5a2dc61e259ee346d4d937569ca0b7a6ab848ec |
Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, big endian 7
| SRPM | |
|---|---|
| libxml2-2.9.1-6.el7_9.20.src.rpm | SHA-256: bfd1d555ce4bb496f5bbd4e1bf254050c38ff03a598f1aeb8a9a617f5e2ff0fb |
| ppc64 | |
| libxml2-2.9.1-6.el7_9.20.ppc.rpm | SHA-256: 0a4843e8ed1313d17a97f78e0fd753ec9eea7233da4b6536ffb66b5c9c3e12c3 |
| libxml2-2.9.1-6.el7_9.20.ppc64.rpm | SHA-256: 100b0e62713fe3ea3c312263522411986d2d9488f510f3ef2b68095b778f344d |
| libxml2-debuginfo-2.9.1-6.el7_9.20.ppc.rpm | SHA-256: 8c2c1c2fb72646173b77c479b05606591b20970b0fe53280fce3a57c22a684e2 |
| libxml2-debuginfo-2.9.1-6.el7_9.20.ppc.rpm | SHA-256: 8c2c1c2fb72646173b77c479b05606591b20970b0fe53280fce3a57c22a684e2 |
| libxml2-debuginfo-2.9.1-6.el7_9.20.ppc64.rpm | SHA-256: dae636cc2d66fb1536d98784058fa28f437d9be7b1e0b50ebfcf669df52a1913 |
| libxml2-debuginfo-2.9.1-6.el7_9.20.ppc64.rpm | SHA-256: dae636cc2d66fb1536d98784058fa28f437d9be7b1e0b50ebfcf669df52a1913 |
| libxml2-devel-2.9.1-6.el7_9.20.ppc.rpm | SHA-256: ce81529cbd9f9d7a042842a1ff3183d9af0db77e6d7ad2b173b907a2ea451003 |
| libxml2-devel-2.9.1-6.el7_9.20.ppc64.rpm | SHA-256: c9519c3b1b70b1d53e2f6db7e8eb0a3557aaa47add16df88e031681214114490 |
| libxml2-python-2.9.1-6.el7_9.20.ppc64.rpm | SHA-256: 8ecc38fd9ee10a3394038ce4bdda5286f4c8c161c2889e87954e0fc332252c97 |
| libxml2-static-2.9.1-6.el7_9.20.ppc.rpm | SHA-256: f61d9f82d0cfd84e56449b89dbebd51061d289bae17951a622279fba485872cd |
| libxml2-static-2.9.1-6.el7_9.20.ppc64.rpm | SHA-256: 5137550d377acee8945493934037ad893070c0389c1f39350d7a603f10544a19 |
Red Hat Enterprise Linux Server - Extended Life Cycle Support for IBM Power, little endian 7
| SRPM | |
|---|---|
| libxml2-2.9.1-6.el7_9.20.src.rpm | SHA-256: bfd1d555ce4bb496f5bbd4e1bf254050c38ff03a598f1aeb8a9a617f5e2ff0fb |
| ppc64le | |
| libxml2-2.9.1-6.el7_9.20.ppc64le.rpm | SHA-256: 25d5ab604ce3ef7db9f396a52a6497a5bb04268a6610b7387365aa9042147445 |
| libxml2-debuginfo-2.9.1-6.el7_9.20.ppc64le.rpm | SHA-256: e29f6377c8228c2d6e822e3bb99390275967a1f48c25a32aa5856ddb93c47b2f |
| libxml2-debuginfo-2.9.1-6.el7_9.20.ppc64le.rpm | SHA-256: e29f6377c8228c2d6e822e3bb99390275967a1f48c25a32aa5856ddb93c47b2f |
| libxml2-devel-2.9.1-6.el7_9.20.ppc64le.rpm | SHA-256: aba6388ebd1e484971fd4d9c742695da268c7c1313765570b117efa4bdcdde0e |
| libxml2-python-2.9.1-6.el7_9.20.ppc64le.rpm | SHA-256: b7e8b4c5354cc89b365350bfd49c595b3d6fa24584d4ee901ad4adb58fe5f4f7 |
| libxml2-static-2.9.1-6.el7_9.20.ppc64le.rpm | SHA-256: 1a93175d262e5dcf0969688da81a1310f91a3bd567c9ac9b5879d142fed3c1ee |
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