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CVE-2023-52610

7.5 · HIGH

In the Linux kernel, the following vulnerability has been resolved: net/sched: act_ct: fix skb leak and crash on ooo frags act_ct adds skb->users before defragmentation.

Published Mar 18, 2024CWE-401EPSS 0.64%

Overview

CVE-2023-52610 is a high-severity vulnerability. It was published on March 18, 2024 and has a CVSS 3.1 base score of 7.5 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

net/sched: act_ct: fix skb leak and crash on ooo frags

act_ct adds skb->users before defragmentation. If frags arrive in order,

the last frag's reference is reset in:

inet_frag_reasm_prepare

skb_morph

which is not straightforward.

However when frags arrive out of order, nobody unref the last frag, and

all frags are leaked. The situation is even worse, as initiating packet

capture can lead to a crash[0] when skb has been cloned and shared at the

same time.

Fix the issue by removing skb_get() before defragmentation. act_ct

returns TC_ACT_CONSUMED when defrag failed or in progress.

[0]:

[ 843.804823] ------------[ cut here ]------------

[ 843.809659] kernel BUG at net/core/skbuff.c:2091!

[ 843.814516] invalid opcode: 0000 [#1] PREEMPT SMP

[ 843.819296] CPU: 7 PID: 0 Comm: swapper/7 Kdump: loaded Tainted: G S 6.7.0-rc3 #2

[ 843.824107] Hardware name: XFUSION 1288H V6/BC13MBSBD, BIOS 1.29 11/25/2022

[ 843

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/0b5b831122fc3789fff75be433ba3e4dd7b779d4Refgit.kernel.org/stable/c/172ba7d46c202e679f3ccb10264c67416aaeb1c4Refgit.kernel.org/stable/c/3f14b377d01d8357eba032b4cabc8c1149b458b6Refgit.kernel.org/stable/c/73f7da5fd124f2cda9161e2e46114915e6e82e97Refgit.kernel.org/stable/c/f5346df0591d10bc948761ca854b1fae6d2ef441Refgit.kernel.org/stable/c/0b5b831122fc3789fff75be433ba3e4dd7b779d4Refgit.kernel.org/stable/c/172ba7d46c202e679f3ccb10264c67416aaeb1c4Refgit.kernel.org/stable/c/3f14b377d01d8357eba032b4cabc8c1149b458b6Refgit.kernel.org/stable/c/73f7da5fd124f2cda9161e2e46114915e6e82e97Refgit.kernel.org/stable/c/f5346df0591d10bc948761ca854b1fae6d2ef441

How CyberStrike helps

Frequently asked questions

What is CVE-2023-52610?

CVE-2023-52610 is a high-severity vulnerability. It was published on March 18, 2024 and has a CVSS 3.1 base score of 7.5 (HIGH).

How severe is CVE-2023-52610?

This vulnerability has a CVSS 3.1 base score of 7.5, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2023-52610?

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-2023-52610?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2023-52610 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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