Description
A stack overflow vulnerability exists in the libexpat library due to the way it handles recursive entity expansion in XML documents. When parsing an XML document with deeply nested entity references, libexpat can be forced to recurse indefinitely, exhausting the stack space and causing a crash. This issue could lead to denial of service (DoS) or, in some cases, exploitable memory corruption, depending on the environment and library usage.
Problem types
Product status
Any version before 2.7.0
0:2.7.1-1.el10_0 (rpm) before *
0:2.2.5-17.el8_10 (rpm) before *
0:1.51.0-11.el8_10 (rpm) before *
0:1.51.0-5.el8_2.2 (rpm) before *
0:2.2.10-1.el8_4 (rpm) before *
0:1.51.0-5.el8_4.2 (rpm) before *
0:2.2.10-1.el8_4 (rpm) before *
0:1.51.0-5.el8_4.2 (rpm) before *
0:1.51.0-5.el8_4.2 (rpm) before *
0:1.51.0-6.el8_6.1 (rpm) before *
0:1.51.0-6.el8_6.1 (rpm) before *
0:1.51.0-6.el8_6.1 (rpm) before *
0:1.51.0-8.el8_8.1 (rpm) before *
0:2.2.10-1.el8_8 (rpm) before *
0:2.2.10-1.el8_8 (rpm) before *
0:2.5.0-3.el9_5.3 (rpm) before *
0:2.5.0-5.el9_6 (rpm) before *
0:2.5.0-3.el9_5.3 (rpm) before *
0:2.5.0-5.el9_6 (rpm) before *
0:2.2.10-12.el9_0.4 (rpm) before *
0:2.5.0-1.el9_2.3 (rpm) before *
0:2.5.0-2.el9_4.3 (rpm) before *
sha256:9cde560029ea98eb500a811c82e4d55318d686e01383c00e857b838a2db88919 (rpm) before *
sha256:f33991d766b618a128fb99fbe4f9b61c5004f7c6aa73b2b38e28d59e56c64d63 (rpm) before *
sha256:492e412759cf0eedfa5b557f7b0865f8864f84d0ed75e11dc8d7a840837d9644 (rpm) before *
Timeline
| 2024-06-12: | Reported to Red Hat. |
| 2025-03-13: | Made public. |
Credits
This issue was discovered by Jann Horn (Google Project Zero), Sandipan Roy (Red Hat), Sebastian Pipping (libexpat), and Tomas Korbar (Red Hat).
References
www.openwall.com/lists/oss-security/2025/03/15/1
blog.hartwork.org/posts/expat-2-7-0-released/
github.com/libexpat/libexpat/blob/R_2_7_0/expat/Changes
bugzilla.suse.com/show_bug.cgi?id=1239618
ubuntu.com/security/CVE-2024-8176
security-tracker.debian.org/tracker/CVE-2024-8176
gitlab.alpinelinux.org/...ff36fc6f4789988a09c69b434db757db53
security.netapp.com/advisory/ntap-20250328-0009/
www.kb.cert.org/vuls/id/760160
seclists.org/fulldisclosure/2025/May/12
seclists.org/fulldisclosure/2025/May/11
seclists.org/fulldisclosure/2025/May/10
seclists.org/fulldisclosure/2025/May/8
seclists.org/fulldisclosure/2025/May/7
seclists.org/fulldisclosure/2025/May/6
www.openwall.com/lists/oss-security/2025/09/24/11
access.redhat.com/errata/RHSA-2025:13681 (RHSA-2025:13681)
access.redhat.com/errata/RHSA-2025:22033 (RHSA-2025:22033)
access.redhat.com/errata/RHSA-2025:22034 (RHSA-2025:22034)
access.redhat.com/errata/RHSA-2025:22035 (RHSA-2025:22035)
access.redhat.com/errata/RHSA-2025:22607 (RHSA-2025:22607)
access.redhat.com/errata/RHSA-2025:22785 (RHSA-2025:22785)
access.redhat.com/errata/RHSA-2025:3531 (RHSA-2025:3531)
access.redhat.com/errata/RHSA-2025:3734 (RHSA-2025:3734)
access.redhat.com/errata/RHSA-2025:3913 (RHSA-2025:3913)
access.redhat.com/errata/RHSA-2025:4048 (RHSA-2025:4048)
access.redhat.com/errata/RHSA-2025:4446 (RHSA-2025:4446)
access.redhat.com/errata/RHSA-2025:4447 (RHSA-2025:4447)
access.redhat.com/errata/RHSA-2025:4448 (RHSA-2025:4448)
access.redhat.com/errata/RHSA-2025:4449 (RHSA-2025:4449)
access.redhat.com/errata/RHSA-2025:7444 (RHSA-2025:7444)
access.redhat.com/errata/RHSA-2025:7512 (RHSA-2025:7512)
access.redhat.com/errata/RHSA-2025:8385 (RHSA-2025:8385)
access.redhat.com/security/cve/CVE-2024-8176
bugzilla.redhat.com/show_bug.cgi?id=2310137 (RHBZ#2310137)
github.com/libexpat/libexpat/issues/893
