CVE-2025-21722 — Use After Free in Linux

CWE-416 — Use After Free99 documents7 sources
Severity
7.8HIGHNVD
OSV8.8OSV7.1OSV5.9OSV5.5
EPSS
0.0%
top 92.13%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
6
LinuxLinux KernelDebian Linux+3 more
Timeline
PublishedFeb 27
Latest updateDec 16

Description

In the Linux kernel, the following vulnerability has been resolved: nilfs2: do not force clear folio if buffer is referenced Patch series "nilfs2: protect busy buffer heads from being force-cleared". This series fixes the buffer head state inconsistency issues reported by syzbot that occurs when the filesystem is corrupted and falls back to read-only, and the associated buffer head use-after-free issue. This patch (of 2): Syzbot has reported that after nilfs2 detects filesystem corruption …

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 Packages8 packages

▶NVDlinux/linux_kernel3.10 — 5.4.291+5
▶Debianlinux/linux_kernel< 5.10.237-1+3
▶Ubuntulinux/linux_kernel< 5.4.0-216.236+4
▶CVEListV5linux/linux8c26c4e2694a163d525976e804d81cd955bbb40c — 7d0544bacc11d6aa26ecd7debf9353193c7a3328+7

Patches

Patch: git.kernel.org ↗Patch: git.kernel.org ↗Patch: git.kernel.org ↗

🔴Vulnerability Details

49
OSV
linux-azure-fips vulnerabilities↗2025-12-16
▶
OSV
linux-fips vulnerabilities↗2025-12-15
▶
OSV
linux, linux-aws, linux-kvm, linux-lts-xenial vulnerabilities↗2025-12-15
▶
OSV
linux-azure, linux-azure-4.15, linux-oracle, vulnerabilities↗2025-12-12
▶
OSV
linux-gcp, linux-gcp-4.15, linux-hwe vulnerabilities↗2025-12-04
▶

📋Vendor Advisories

49
Ubuntu
Linux kernel (Azure FIPS) vulnerabilities↗2025-12-16
▶
Ubuntu
Linux kernel vulnerabilities↗2025-12-15
▶
Ubuntu
Linux kernel (FIPS) vulnerabilities↗2025-12-15
▶
Ubuntu
Linux kernel kernel vulnerabilities↗2025-12-12
▶
Ubuntu
Linux kernel vulnerabilities↗2025-12-04
▶
CVE-2025-21722 — Use After Free in Linux | cvebase