CVE-2026-14164 Libarchive: double-free vulnerability in rar5 decompression logic via dangling filtered_buf pointer in init_unpack()
A double-free vulnerability in Libarchive's RAR5 reader allows attackers to cause denial of service via crafted archives.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-14164?
CVE-2026-14164 is a high-severity use after free vulnerability in Cert Manager support for Red Hat OpenShift release 1.17, published on 30 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A double free issue has been identified in libarchive's RAR5 reader. During parsing of a specially crafted RAR5 archive, the filtered_buf pointer may remain stale after being freed during unpacking state reinitialization. Subsequent processing of another archive entry can trigger a second free of the same memory region, resulting in a double-free condition. Successful exploitation may cause applications using the vulnerable libarchive API to terminate unexpectedly, leading to a denial of service.
Weakness: CWE-415
Which versions are affected by CVE-2026-14164?
Linux distribution packages (40)
bsdtar AlmaLinux:10 | All versions | 3.7.7-10.el10_2 |
libarchive AlmaLinux:10 | All versions | 3.7.7-10.el10_2 |
libarchive-devel AlmaLinux:10 | All versions | 3.7.7-10.el10_2 |
bsdtar AlmaLinux:9 | All versions | 3.5.3-11.el9_8 |
libarchive AlmaLinux:9 | All versions | 3.5.3-11.el9_8 |
libarchive-devel AlmaLinux:9 | All versions | 3.5.3-11.el9_8 |
bsdcat-debuginfo Red Hat:enterprise_linux:10.2 | All versions | 0:3.7.7-10.el10_2 |
bsdcpio-debuginfo Red Hat:enterprise_linux:10.2 | All versions | 0:3.7.7-10.el10_2 |
bsdtar Red Hat:enterprise_linux:10.2 | All versions | 0:3.7.7-10.el10_2 |
bsdtar-debuginfo Red Hat:enterprise_linux:10.2 | All versions | 0:3.7.7-10.el10_2 |
bsdunzip-debuginfo Red Hat:enterprise_linux:10.2 | All versions | 0:3.7.7-10.el10_2 |
libarchive Red Hat:enterprise_linux:10.2 | All versions | 0:3.7.7-10.el10_2 |
libarchive-debuginfo Red Hat:enterprise_linux:10.2 | All versions | 0:3.7.7-10.el10_2 |
libarchive-debugsource Red Hat:enterprise_linux:10.2 | All versions | 0:3.7.7-10.el10_2 |
libarchive-devel Red Hat:enterprise_linux:10.2 | All versions | 0:3.7.7-10.el10_2 |
bsdcat-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:3.5.3-11.el9_8 |
bsdcpio-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:3.5.3-11.el9_8 |
bsdtar Red Hat:enterprise_linux:9::appstream | All versions | 0:3.5.3-11.el9_8 |
bsdtar-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:3.5.3-11.el9_8 |
libarchive-debuginfo Red Hat:enterprise_linux:9::appstream | All versions | 0:3.5.3-11.el9_8 |
libarchive-debugsource Red Hat:enterprise_linux:9::appstream | All versions | 0:3.5.3-11.el9_8 |
libarchive-devel Red Hat:enterprise_linux:9::appstream | All versions | 0:3.5.3-11.el9_8 |
bsdcat-debuginfo Red Hat:enterprise_linux:9::baseos | All versions | 0:3.5.3-11.el9_8 |
bsdcpio-debuginfo Red Hat:enterprise_linux:9::baseos | All versions | 0:3.5.3-11.el9_8 |
bsdtar-debuginfo Red Hat:enterprise_linux:9::baseos | All versions | 0:3.5.3-11.el9_8 |
libarchive Red Hat:enterprise_linux:9::baseos | All versions | 0:3.5.3-11.el9_8 |
libarchive-debuginfo Red Hat:enterprise_linux:9::baseos | All versions | 0:3.5.3-11.el9_8 |
libarchive-debugsource Red Hat:enterprise_linux:9::baseos | All versions | 0:3.5.3-11.el9_8 |
bsdcat-debuginfo Red Hat:enterprise_linux_eus:10.0 | All versions | 0:3.7.7-5.el10_0.1 |
bsdcpio-debuginfo Red Hat:enterprise_linux_eus:10.0 | All versions | 0:3.7.7-5.el10_0.1 |
bsdtar Red Hat:enterprise_linux_eus:10.0 | All versions | 0:3.7.7-5.el10_0.1 |
bsdtar-debuginfo Red Hat:enterprise_linux_eus:10.0 | All versions | 0:3.7.7-5.el10_0.1 |
bsdunzip-debuginfo Red Hat:enterprise_linux_eus:10.0 | All versions | 0:3.7.7-5.el10_0.1 |
libarchive Red Hat:enterprise_linux_eus:10.0 | All versions | 0:3.7.7-5.el10_0.1 |
libarchive-debuginfo Red Hat:enterprise_linux_eus:10.0 | All versions | 0:3.7.7-5.el10_0.1 |
libarchive-debugsource Red Hat:enterprise_linux_eus:10.0 | All versions | 0:3.7.7-5.el10_0.1 |
libarchive-devel Red Hat:enterprise_linux_eus:10.0 | All versions | 0:3.7.7-5.el10_0.1 |
bsdcat Red Hat:hummingbird:1 | All versions | 0:3.8.8-2.hum1 |
bsdcpio Red Hat:hummingbird:1 | All versions | 0:3.8.8-2.hum1 |
bsdtar Red Hat:hummingbird:1 | All versions | 0:3.8.8-2.hum1 |
How do I fix CVE-2026-14164?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-14164 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-14164 exists.
Sources
Also known as ALSA-2026:52674, ALSA-2026:52675, AZL-91713, BELL-CVE-2026-14164, DEBIAN-CVE-2026-14164, ECHO-54dd-0906-dc9a and 16 more.