CVE-2023-53685 — Missing Release of Memory after Effective Lifetime in Linux

CWE-401 — Missing Release of Memory after Effective LifetimeCWE-772 — Missing Release of Resource after Effective Lifetime5 documents5 sources
Severity
5.5MEDIUMNVD
EPSS
0.0%
top 98.22%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
LinuxLinux KernelDebian Linux
Timeline
PublishedOct 7

Description

In the Linux kernel, the following vulnerability has been resolved: tun: Fix memory leak for detached NAPI queue. syzkaller reported [0] memory leaks of sk and skb related to the TUN device with no repro, but we can reproduce it easily with: struct ifreq ifr = {} int fd_tun, fd_tmp; char buf[4] = {}; fd_tun = openat(AT_FDCWD, "/dev/net/tun", O_WRONLY, 0); ifr.ifr_flags = IFF_TUN | IFF_NAPI | IFF_MULTI_QUEUE; ioctl(fd_tun, TUNSETIFF, &ifr); ifr.ifr_flags = IFF_DETACH_QUEUE; ioctl(fd_tun, TUN…

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 Packages4 packages

▶NVDlinux/linux_kernel3.8 — 6.1.30+2
▶Debianlinux/linux_kernel< 6.1.37-1+2
▶CVEListV5linux/linuxcde8b15f1aabe327038ee4e0e11dd6b798572f69 — 9cae243b9ae25adfe468cd47ceca591f6725b79c+3
▶debiandebian/linux< linux 6.1.37-1 (bookworm)

Patches

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

🔴Vulnerability Details

2
OSV
CVE-2023-53685: In the Linux kernel, the following vulnerability has been resolved: tun: Fix memory leak for detached NAPI queue↗2025-10-07
▶
GHSA
GHSA-q99f-whjq-3rrx: In the Linux kernel, the following vulnerability has been resolved: tun: Fix memory leak for detached NAPI queue↗2025-10-07
▶

📋Vendor Advisories

2
Red Hat
kernel: tun: Fix memory leak for detached NAPI queue↗2025-10-07
▶
Debian
CVE-2023-53685: linux - In the Linux kernel, the following vulnerability has been resolved: tun: Fix me...↗2023
▶