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CVE-2023-53109

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: net: tunnels: annotate lockless accesses to dev->needed_headroom IP tunnels can apparently update dev->needed_headroom in their…

Published May 2, 2025EPSS 0.20%

Overview

CVE-2023-53109 is a medium-severity vulnerability. It was published on May 2, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

net: tunnels: annotate lockless accesses to dev->needed_headroom

IP tunnels can apparently update dev->needed_headroom

in their xmit path.

This patch takes care of three tunnels xmit, and also the

core LL_RESERVED_SPACE() and LL_RESERVED_SPACE_EXTRA()

helpers.

More changes might be needed for completeness.

BUG: KCSAN: data-race in ip_tunnel_xmit / ip_tunnel_xmit

read to 0xffff88815b9da0ec of 2 bytes by task 888 on cpu 1:

ip_tunnel_xmit+0x1270/0x1730 net/ipv4/ip_tunnel.c:803

__gre_xmit net/ipv4/ip_gre.c:469 [inline]

ipgre_xmit+0x516/0x570 net/ipv4/ip_gre.c:661

__netdev_start_xmit include/linux/netdevice.h:4881 [inline]

netdev_start_xmit include/linux/netdevice.h:4895 [inline]

xmit_one net/core/dev.c:3580 [inline]

dev_hard_start_xmit+0x127/0x400 net/core/dev.c:3596

__dev_queue_xmit+0x1007/0x1eb0 net/core/dev.c:4246

dev_queue_xmit include/linux/netdevice.h:3051 [inline]

neigh_direct_output+0x17/0x20 net/core/neighbo

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/4b397c06cb987935b1b097336532aa6b4210e091Refgit.kernel.org/stable/c/51f3bd3765bc5ca4583af07a00833da00d2ace1dRefgit.kernel.org/stable/c/5aaab217c8f5387b9c5fff9e940d80f135e04366Refgit.kernel.org/stable/c/8e206f66d824b3b28a7f9ee1366dfc79a937bb46Refgit.kernel.org/stable/c/9b86a8702b042ee4e15d2d46375be873a6a8834fRefgit.kernel.org/stable/c/a69b72b57b7d269e833e520ba7500d556e8189b6Refgit.kernel.org/stable/c/be59b87ee4aed81db7c10e44f603866a0ac3ca5dRefgit.kernel.org/stable/c/e0a557fc1daf5c1086e47150a4571aebadbb62be

How CyberStrike helps

Frequently asked questions

What is CVE-2023-53109?

CVE-2023-53109 is a medium-severity vulnerability. It was published on May 2, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-53109?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2023-53109?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2023-53109?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-53109 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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