CVE-2023-53853 - Vulnerability Details

- netlink: annotate accesses to nlk->cb_running

Description

In the Linux kernel, the following vulnerability has been resolved:

netlink: annotate accesses to nlk->cb_running

Both netlink_recvmsg() and netlink_native_seq_show() read
nlk->cb_running locklessly. Use READ_ONCE() there.

Add corresponding WRITE_ONCE() to netlink_dump() and
__netlink_dump_start()

syzbot reported:
BUG: KCSAN: data-race in __netlink_dump_start / netlink_recvmsg

write to 0xffff88813ea4db59 of 1 bytes by task 28219 on cpu 0:
__netlink_dump_start+0x3af/0x4d0 net/netlink/af_netlink.c:2399
netlink_dump_start include/linux/netlink.h:308 [inline]
rtnetlink_rcv_msg+0x70f/0x8c0 net/core/rtnetlink.c:6130
netlink_rcv_skb+0x126/0x220 net/netlink/af_netlink.c:2577
rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:6192
netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline]
netlink_unicast+0x56f/0x640 net/netlink/af_netlink.c:1365
netlink_sendmsg+0x665/0x770 net/netlink/af_netlink.c:1942
sock_sendmsg_nosec net/socket.c:724 [inline]
sock_sendmsg net/socket.c:747 [inline]
sock_write_iter+0x1aa/0x230 net/socket.c:1138
call_write_iter include/linux/fs.h:1851 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x463/0x760 fs/read_write.c:584
ksys_write+0xeb/0x1a0 fs/read_write.c:637
__do_sys_write fs/read_write.c:649 [inline]
__se_sys_write fs/read_write.c:646 [inline]
__x64_sys_write+0x42/0x50 fs/read_write.c:646
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd

read to 0xffff88813ea4db59 of 1 bytes by task 28222 on cpu 1:
netlink_recvmsg+0x3b4/0x730 net/netlink/af_netlink.c:2022
sock_recvmsg_nosec+0x4c/0x80 net/socket.c:1017
____sys_recvmsg+0x2db/0x310 net/socket.c:2718
___sys_recvmsg net/socket.c:2762 [inline]
do_recvmmsg+0x2e5/0x710 net/socket.c:2856
__sys_recvmmsg net/socket.c:2935 [inline]
__do_sys_recvmmsg net/socket.c:2958 [inline]
__se_sys_recvmmsg net/socket.c:2951 [inline]
__x64_sys_recvmmsg+0xe2/0x160 net/socket.c:2951
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd

value changed: 0x00 -> 0x01

Published: 2025-12-09

Score: 7.0 High

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`16b304f3404f8e0243d5ee2b70b68767b7b59b2b`	affected	< e25e9d8a210ed78bdf0f364576dbee13aefadbf8
`16b304f3404f8e0243d5ee2b70b68767b7b59b2b`	affected	< 840a647499b093621167de56ffa8756dfc69f242
`16b304f3404f8e0243d5ee2b70b68767b7b59b2b`	affected	< a507022c862e10744a92c4bf5709775450a110ad
`16b304f3404f8e0243d5ee2b70b68767b7b59b2b`	affected	< f92557f79a60cb142258f5fa7194f327573fadd8
`16b304f3404f8e0243d5ee2b70b68767b7b59b2b`	affected	< 1d5c8b01f1df0461256a6d75854ed806f50645a3
`16b304f3404f8e0243d5ee2b70b68767b7b59b2b`	affected	< a115dadf8995b1730c36c474401d97355705cb88
`16b304f3404f8e0243d5ee2b70b68767b7b59b2b`	affected	< 02e7afd659a4c9ce1e98fc01ab4c510f3de1f0b3
`16b304f3404f8e0243d5ee2b70b68767b7b59b2b`	affected	< a939d14919b799e6fff8a9c80296ca229ba2f8a4

Linux

affected

Version	Status	Constraints
`3.12`	affected	—
`0`	unaffected	< 3.12
`4.14.316`	unaffected	≤ 4.14.*
`4.19.284`	unaffected	≤ 4.19.*
`5.4.244`	unaffected	≤ 5.4.*
`5.10.181`	unaffected	≤ 5.10.*
`5.15.113`	unaffected	≤ 5.15.*
`6.1.30`	unaffected	≤ 6.1.*
`6.3.4`	unaffected	≤ 6.3.*
`6.4`	unaffected	≤ *

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

Sign in to view the affected projects.

Advisories

No advisories yet.

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00029.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/02e7afd659a4c9ce1e98fc01ab4c510f3de1f0b3
https://git.kernel.org/stable/c/1d5c8b01f1df0461256a6d75854ed806f50645a3
https://git.kernel.org/stable/c/840a647499b093621167de56ffa8756dfc69f242
https://git.kernel.org/stable/c/a115dadf8995b1730c36c474401d97355705cb88
https://git.kernel.org/stable/c/a507022c862e10744a92c4bf5709775450a110ad
https://git.kernel.org/stable/c/a939d14919b799e6fff8a9c80296ca229ba2f8a4
https://git.kernel.org/stable/c/e25e9d8a210ed78bdf0f364576dbee13aefadbf8
https://git.kernel.org/stable/c/f92557f79a60cb142258f5fa7194f327573fadd8
https://lore.kernel.org/linux-cve-announce/2025120902-CVE-2023-53853-424f@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2023-53853
https://www.cve.org/CVERecord?id=CVE-2023-53853

History

Wed, 10 Dec 2025 00:15:00 +0000

Type	Values Removed	Values Added
References		https://lore.kernel.org/linux-cve-announce/2025120902-CVE-2023-53853-424f@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2023-53853 https://www.cve.org/CVERecord?id=CVE-2023-53853
Metrics	threat_severity `None`	cvssV3_1 `{'score': 7.0, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H'}` threat_severity `Important`

Tue, 09 Dec 2025 02:00:00 +0000

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: netlink: annotate accesses to nlk->cb_running Both netlink_recvmsg() and netlink_native_seq_show() read nlk->cb_running locklessly. Use READ_ONCE() there. Add corresponding WRITE_ONCE() to netlink_dump() and __netlink_dump_start() syzbot reported: BUG: KCSAN: data-race in __netlink_dump_start / netlink_recvmsg write to 0xffff88813ea4db59 of 1 bytes by task 28219 on cpu 0: __netlink_dump_start+0x3af/0x4d0 net/netlink/af_netlink.c:2399 netlink_dump_start include/linux/netlink.h:308 [inline] rtnetlink_rcv_msg+0x70f/0x8c0 net/core/rtnetlink.c:6130 netlink_rcv_skb+0x126/0x220 net/netlink/af_netlink.c:2577 rtnetlink_rcv+0x1c/0x20 net/core/rtnetlink.c:6192 netlink_unicast_kernel net/netlink/af_netlink.c:1339 [inline] netlink_unicast+0x56f/0x640 net/netlink/af_netlink.c:1365 netlink_sendmsg+0x665/0x770 net/netlink/af_netlink.c:1942 sock_sendmsg_nosec net/socket.c:724 [inline] sock_sendmsg net/socket.c:747 [inline] sock_write_iter+0x1aa/0x230 net/socket.c:1138 call_write_iter include/linux/fs.h:1851 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x463/0x760 fs/read_write.c:584 ksys_write+0xeb/0x1a0 fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __x64_sys_write+0x42/0x50 fs/read_write.c:646 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd read to 0xffff88813ea4db59 of 1 bytes by task 28222 on cpu 1: netlink_recvmsg+0x3b4/0x730 net/netlink/af_netlink.c:2022 sock_recvmsg_nosec+0x4c/0x80 net/socket.c:1017 ____sys_recvmsg+0x2db/0x310 net/socket.c:2718 ___sys_recvmsg net/socket.c:2762 [inline] do_recvmmsg+0x2e5/0x710 net/socket.c:2856 __sys_recvmmsg net/socket.c:2935 [inline] __do_sys_recvmmsg net/socket.c:2958 [inline] __se_sys_recvmmsg net/socket.c:2951 [inline] __x64_sys_recvmmsg+0xe2/0x160 net/socket.c:2951 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0xc0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd value changed: 0x00 -> 0x01
Title		netlink: annotate accesses to nlk->cb_running
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/02e7afd659a4c9ce1e98fc01ab4c510f3de1f0b3 https://git.kernel.org/stable/c/1d5c8b01f1df0461256a6d75854ed806f50645a3 https://git.kernel.org/stable/c/840a647499b093621167de56ffa8756dfc69f242 https://git.kernel.org/stable/c/a115dadf8995b1730c36c474401d97355705cb88 https://git.kernel.org/stable/c/a507022c862e10744a92c4bf5709775450a110ad https://git.kernel.org/stable/c/a939d14919b799e6fff8a9c80296ca229ba2f8a4 https://git.kernel.org/stable/c/e25e9d8a210ed78bdf0f364576dbee13aefadbf8 https://git.kernel.org/stable/c/f92557f79a60cb142258f5fa7194f327573fadd8

Subscriptions

Linux Linux Kernel

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2025-12-09T01:30:18.628Z

Updated: 2026-05-11T19:52:47.011Z

Reserved: 2025-12-09T01:27:17.828Z

Link: CVE-2023-53853

Vulnrichment

No data.

NVD

Status : Deferred

Published: 2025-12-09T16:17:25.933

Modified: 2026-04-15T00:35:42.020

Link: CVE-2023-53853

Redhat

Severity : Important

Publid Date: 2025-12-09T00:00:00Z

Links: CVE-2023-53853 - Bugzilla

OpenCVE Enrichment

No data.

Weaknesses

No weakness.

Tracking

Attack Vector Local

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

Subscriptions

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