CVE-2023-53489 — 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 96.24%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
LinuxLinux KernelDebian Linux
Timeline
PublishedOct 1

Description

In the Linux kernel, the following vulnerability has been resolved: tcp/udp: Fix memleaks of sk and zerocopy skbs with TX timestamp. syzkaller reported [0] memory leaks of an UDP socket and ZEROCOPY skbs. We can reproduce the problem with these sequences: sk = socket(AF_INET, SOCK_DGRAM, 0) sk.setsockopt(SOL_SOCKET, SO_TIMESTAMPING, SOF_TIMESTAMPING_TX_SOFTWARE) sk.setsockopt(SOL_SOCKET, SO_ZEROCOPY, 1) sk.sendto(b'', MSG_ZEROCOPY, ('127.0.0.1', 53)) sk.close() sendmsg() calls msg_zerocopy_a…

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_kernel4.14 — 4.14.315+7
▶Debianlinux/linux_kernel< 5.10.191-1+3
▶CVEListV5linux/linuxf214f915e7db99091f1312c48b30928c1e0c90b7 — 281072fb2a7294cde7acbf5375b879f40a8001b7+9
▶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-2023-53489: In the Linux kernel, the following vulnerability has been resolved: tcp/udp: Fix memleaks of sk and zerocopy skbs with TX timestamp↗2025-10-01
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GHSA
GHSA-5wf2-hxf9-8hxr: In the Linux kernel, the following vulnerability has been resolved: tcp/udp: Fix memleaks of sk and zerocopy skbs with TX timestamp↗2025-10-01
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📋Vendor Advisories

2
Red Hat
kernel: tcp/udp: Fix memleaks of sk and zerocopy skbs with TX timestamp↗2025-10-01
▶
Debian
CVE-2023-53489: linux - In the Linux kernel, the following vulnerability has been resolved: tcp/udp: Fi...↗2023
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CVE-2023-53489 — Linux vulnerability | cvebase