CVE-2025-71110Use After Free in Linux

CWE-416Use After Free7 documents6 sources
Severity
7.8HIGHNVD
EPSS
0.0%
top 94.95%
CISA KEV
Not in KEV
Exploit
No known exploits
Timeline
PublishedJan 14

Description

In the Linux kernel, the following vulnerability has been resolved: mm/slub: reset KASAN tag in defer_free() before accessing freed memory When CONFIG_SLUB_TINY is enabled, kfree_nolock() calls kasan_slab_free() before defer_free(). On ARM64 with MTE (Memory Tagging Extension), kasan_slab_free() poisons the memory and changes the tag from the original (e.g., 0xf3) to a poison tag (0xfe). When defer_free() then tries to write to the freed object to build the deferred free list via llist_add(),

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages4 packages

Linuxlinux/linux_kernel6.18.06.18.3
NVDlinux/linux_kernel6.18.16.18.3+2
CVEListV5linux/linuxaf92793e52c3a99b828ed4bdd277fd3e11c18d0865d4e5af2a2e82f4fc50d8259aee208fbc6b2c1d+2
debiandebian/linux

Patches

🔴Vulnerability Details

3
OSV
mm/slub: reset KASAN tag in defer_free() before accessing freed memory2026-01-14
GHSA
GHSA-m8f2-rw7m-jrxf: In the Linux kernel, the following vulnerability has been resolved: mm/slub: reset KASAN tag in defer_free() before accessing freed memory When CONF2026-01-14
OSV
CVE-2025-71110: In the Linux kernel, the following vulnerability has been resolved: mm/slub: reset KASAN tag in defer_free() before accessing freed memory When CONFIG2026-01-14

📋Vendor Advisories

2
Red Hat
kernel: mm/slub: reset KASAN tag in defer_free() before accessing freed memory2026-01-14
Debian
CVE-2025-71110: linux - In the Linux kernel, the following vulnerability has been resolved: mm/slub: re...2025

🕵️Threat Intelligence

1
Wiz
CVE-2025-71110 Impact, Exploitability, and Mitigation Steps | Wiz