CVE-2025-39852Missing Release of Memory after Effective Lifetime in Linux

Severity
5.5MEDIUMNVD
OSV3.2
EPSS
0.0%
top 97.71%
CISA KEV
Not in KEV
Exploit
No known exploits
Timeline
PublishedSep 19
Latest updateApr 9

Description

In the Linux kernel, the following vulnerability has been resolved: net/tcp: Fix socket memory leak in TCP-AO failure handling for IPv6 When tcp_ao_copy_all_matching() fails in tcp_v6_syn_recv_sock() it just exits the function. This ends up causing a memory-leak: unreferenced object 0xffff0000281a8200 (size 2496): comm "softirq", pid 0, jiffies 4295174684 hex dump (first 32 bytes): 7f 00 00 06 7f 00 00 06 00 00 00 00 cb a8 88 13 ................ 0a 00 03 61 00 00 00 00 00 00 00 00 00 00 00 00

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HExploitability: 1.8 | Impact: 3.6

Affected Packages5 packages

NVDlinux/linux_kernel6.76.12.46+2
Debianlinux/linux_kernel< 6.12.48-1+1
Ubuntulinux/linux_kernel< 6.8.0-106.106
CVEListV5linux/linux06b22ef29591f625ef877ae00d82192938e29e6046d33c878fc0b3d7570366b2c9912395b3f4e701+3
debiandebian/linux< linux 6.16.6-1 (forky)

Patches

🔴Vulnerability Details

10
OSV
linux-raspi, linux-raspi-realtime vulnerabilities2026-04-01
OSV
linux-azure-6.8 vulnerabilities2026-03-25
OSV
linux-azure vulnerabilities2026-03-25
OSV
linux-aws-6.8 vulnerabilities2026-03-23
OSV
linux-realtime, linux-realtime-6.8 vulnerabilities2026-03-17

📋Vendor Advisories

11
Ubuntu
Linux kernel (Azure FIPS) vulnerabilities2026-04-09
Ubuntu
Linux kernel (Raspberry Pi) vulnerabilities2026-04-01
Ubuntu
Linux kernel (Azure) vulnerabilities2026-03-25
Ubuntu
Linux kernel (Azure) vulnerabilities2026-03-25
Ubuntu
Linux kernel (AWS) vulnerabilities2026-03-23
CVE-2025-39852 — Linux vulnerability | cvebase