CVE-2025-38666 — Use After Free in Linux

CWE-416 — Use After Free53 documents8 sources
Severity
7.8HIGHNVD
OSV5.5
EPSS
0.0%
top 96.30%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
LinuxLinux KernelDebian Linux
Timeline
PublishedAug 22
Latest updateJan 12

Description

In the Linux kernel, the following vulnerability has been resolved: net: appletalk: Fix use-after-free in AARP proxy probe The AARP proxy‐probe routine (aarp_proxy_probe_network) sends a probe, releases the aarp_lock, sleeps, then re-acquires the lock. During that window an expire timer thread (__aarp_expire_timer) can remove and kfree() the same entry, leading to a use-after-free. race condition: cpu 0 | cpu 1 atalk_sendmsg() | atif_proxy_probe_device() aarp_send_ddp() | aarp_proxy_probe_ne…

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 Packages3 packages

▶NVDlinux/linux_kernel2.6.13 — 5.4.297+8
▶Debianlinux/linux_kernel< 5.10.244-1+3
▶CVEListV5linux/linux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 — b35694ffabb2af308a1f725d70f60fd8a47d1f3e+8

Also affects: Debian Linux 11.0

Patches

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

🔴Vulnerability Details

13
OSV
linux-iot vulnerabilities↗2026-01-12
▶
OSV
linux-raspi, linux-raspi-realtime vulnerabilities↗2026-01-09
▶
OSV
linux-raspi, linux-raspi-5.4 vulnerabilities↗2026-01-06
▶
OSV
linux-xilinx vulnerabilities↗2025-12-19
▶
OSV
linux-oracle-5.4 vulnerabilities↗2025-12-19
▶

📋Vendor Advisories

39
Ubuntu
Linux kernel (IoT) vulnerabilities↗2026-01-12
▶
Ubuntu
Linux kernel (Azure, N-Series) vulnerabilities↗2026-01-09
▶
Ubuntu
Linux kernel (Raspberry Pi) vulnerabilities↗2026-01-09
▶
Ubuntu
Linux kernel (Raspberry Pi) vulnerabilities↗2026-01-06
▶
Ubuntu
Linux kernel (Oracle) vulnerabilities↗2025-12-19
▶
CVE-2025-38666 — Use After Free in Linux | cvebase