How many CVEs have patched cmsghdr?

4 published CVEs changed cmsghdr in debian/glibc, in 4 distinct patches totalling 624 changed lines, between 2023 and 2026.

What is the latest CVE that changed cmsghdr?

CVE-2025-15281 (wordexp with WRDE_REUSE and WRDE_APPEND may return uninitialized memory), published 2026-01-20, changed lines 248 to 295 of bits/socket.h.

How does cmsghdr compare to the rest of debian/glibc?

debian/glibc has 23 CVEs with a located fix in total; 4 of them changed cmsghdr.

What do the line numbers refer to?

Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

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Cmsghdr

cmsghdr in debian/glibc: Patched by 4 CVEs

debian/glibc

Type

4 files

cmsghdr

Name: cmsghdr in debian/glibc: CVE fixes
Creator: RadicalNotion.AI
License: https://creativecommons.org/licenses/by-nc/4.0/

Defined in 4 files

Last patched January 20, 2026

CVEs

That changed this function

Distinct patches

Backports counted once

624

Lines changed

Added plus removed

2023–2026

Years

By CVE publication date

Overview

cmsghdr in debian/glibc was changed by 4 published CVE fixes between 2023 and 2026, in 4 distinct patches that added or removed 624 lines in total.

The name occurs in 4 files: sysdeps/unix/sysv/linux/bits/socket.h, bits/socket.h, sysdeps/mach/hurd/bits/socket.h, sysdeps/unix/sysv/linux/cmsg_nxthdr.c.

On this page

Overview
CVEs that patched it
Other hotspots in the repository
FAQ
References

debian/glibc has 23 CVEs with a located fix in total, so 17% of them touched this function.

CVEs that patched it

Every published CVE whose fix changed cmsghdr, newest first, with the lines each fix touched.

wordexp with WRDE_REUSE and WRDE_APPEND may return uninitialized memory
CVE-2025-15281 · bits/socket.h · lines 248–295 · +33 −7 in 2 hunks
High · CVSS 7.5
EPSS 0.5%2026-01-20
wordexp with WRDE_REUSE and WRDE_APPEND may return uninitialized memory
CVE-2025-15281 · sysdeps/mach/hurd/bits/socket.h · lines 252–299 · +33 −7 in 2 hunks
High · CVSS 7.5
EPSS 0.5%2026-01-20
wordexp with WRDE_REUSE and WRDE_APPEND may return uninitialized memory
CVE-2025-15281 · sysdeps/unix/sysv/linux/bits/socket.h · lines 310–357 · +33 −7 in 2 hunks
High · CVSS 7.5
EPSS 0.5%2026-01-20
wordexp with WRDE_REUSE and WRDE_APPEND may return uninitialized memory
CVE-2025-15281 · sysdeps/unix/sysv/linux/cmsg_nxthdr.c · lines 26–58 · +28 −8
High · CVSS 7.5
EPSS 0.5%2026-01-20
CVE-2025-0395
CVE-2025-0395 · bits/socket.h · lines 248–295 · +33 −7 in 2 hunks
Medium · CVSS 6.2
EPSS 0.4%2025-01-22
CVE-2025-0395
CVE-2025-0395 · sysdeps/mach/hurd/bits/socket.h · lines 252–299 · +33 −7 in 2 hunks
Medium · CVSS 6.2
EPSS 0.4%2025-01-22
CVE-2025-0395
CVE-2025-0395 · sysdeps/unix/sysv/linux/bits/socket.h · lines 310–357 · +33 −7 in 2 hunks
Medium · CVSS 6.2
EPSS 0.4%2025-01-22
CVE-2025-0395
CVE-2025-0395 · sysdeps/unix/sysv/linux/cmsg_nxthdr.c · lines 26–58 · +28 −8
Medium · CVSS 6.2
EPSS 0.4%2025-01-22
Glibc: potential use-after-free in getaddrinfo()
CVE-2023-4806 · bits/socket.h · lines 248–295 · +33 −7 in 2 hunks
Medium · CVSS 5.9
EPSS 1.6%2023-09-18
Glibc: potential use-after-free in getaddrinfo()
CVE-2023-4806 · sysdeps/mach/hurd/bits/socket.h · lines 252–299 · +33 −7 in 2 hunks
Medium · CVSS 5.9
EPSS 1.6%2023-09-18
Glibc: potential use-after-free in getaddrinfo()
CVE-2023-4806 · sysdeps/unix/sysv/linux/bits/socket.h · lines 310–357 · +33 −7 in 2 hunks
Medium · CVSS 5.9
EPSS 1.6%2023-09-18
Glibc: potential use-after-free in getaddrinfo()
CVE-2023-4806 · sysdeps/unix/sysv/linux/cmsg_nxthdr.c · lines 26–58 · +28 −8
Medium · CVSS 5.9
EPSS 1.6%2023-09-18
Glibc: stack read overflow in getaddrinfo in no-aaaa mode
CVE-2023-4527 · bits/socket.h · lines 248–295 · +33 −7 in 2 hunks
Medium · CVSS 6.5
EPSS 1.7%2023-09-18
Glibc: stack read overflow in getaddrinfo in no-aaaa mode
CVE-2023-4527 · sysdeps/mach/hurd/bits/socket.h · lines 252–299 · +33 −7 in 2 hunks
Medium · CVSS 6.5
EPSS 1.7%2023-09-18
Glibc: stack read overflow in getaddrinfo in no-aaaa mode
CVE-2023-4527 · sysdeps/unix/sysv/linux/bits/socket.h · lines 310–357 · +33 −7 in 2 hunks
Medium · CVSS 6.5
EPSS 1.7%2023-09-18
Glibc: stack read overflow in getaddrinfo in no-aaaa mode
CVE-2023-4527 · sysdeps/unix/sysv/linux/cmsg_nxthdr.c · lines 26–58 · +28 −8
Medium · CVSS 6.5
EPSS 1.7%2023-09-18

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Other hotspots in the repository

Functions in debian/glibc changed by the most CVE fixes.

tmp19 CVEs · sysdeps/aarch64/memcpy.S __mips16_syscall15 CVEs · sysdeps/unix/sysv/linux/mips/mips32/mips16/mips16-syscall.h dstend5 CVEs · sysdeps/aarch64/memcpy.S __gconv_open5 CVEs · iconv/gconv_int.h len5 CVEs · sysdeps/aarch64/strnlen.S __volatile__5 CVEs · sysdeps/unix/sysv/linux/microblaze/sysdep.h

All patched functions in debian/glibc

Frequently asked questions

Common questions about CVE fixes to cmsghdr.

How many CVEs have patched cmsghdr?: 4 published CVEs changed cmsghdr in debian/glibc, in 4 distinct patches totalling 624 changed lines, between 2023 and 2026.
What is the latest CVE that changed cmsghdr?: CVE-2025-15281 (wordexp with WRDE_REUSE and WRDE_APPEND may return uninitialized memory), published 2026-01-20, changed lines 248 to 295 of bits/socket.h.
How does cmsghdr compare to the rest of debian/glibc?: debian/glibc has 23 CVEs with a located fix in total; 4 of them changed cmsghdr.
What do the line numbers refer to?: Line numbers are in the fixed version of the file, as the upstream patch left it. A CVE whose fix was backported to several branches is listed once, with the lines from the upstream commit.

References

sysdeps/unix/sysv/linux/bits/socket.h on GitHub (opens in a new tab)
bits/socket.h on GitHub (opens in a new tab)
sysdeps/mach/hurd/bits/socket.h on GitHub (opens in a new tab)
All patched functions in debian/glibc
Patched functions directory

Fix locations are computed by RadicalNotion.AI from the upstream patch diff of each CVE. CVE data is sourced from the CVE Program.

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