CVE-2024-26643

MEDIUM
Published Mar 21, 2024 Modified May 12, 2026 CWE-667

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: mark set as dead when unbinding anonymous set with timeout While the rhashtable set gc runs asynchronously, a race allows it to collect elements from anonymous sets with timeouts while it is being released from the commit path. Mingi Cho originally reported this issue in a different path in 6.1.x with a pipapo set with low timeouts which is not possible upstream since 7395dfacfff6 ("netfilter: nf_tables: use timestamp to check for set element timeout"). Fix this by setting on the dead flag for anonymous sets to skip async gc in this case. According to 08e4c8c5919f ("netfilter: nf_tables: mark newset as dead on transaction abort"), Florian plans to accelerate abort path by releasing objects via workqueue, therefore, this sets on the dead flag for abort path too.

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CVSS v3.1 Score

5.5
MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-667 CWE-667

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
debian debian_linux

References

Advisories & Patches

https://git.kernel.org/stable/c/291cca35818bd52a407bc37ab45a15816039e363 https://git.kernel.org/stable/c/406b0241d0eb598a0b330ab20ae325537d8d8163 https://git.kernel.org/stable/c/5224afbc30c3ca9ba23e752f0f138729b2c48dd8 https://git.kernel.org/stable/c/552705a3650bbf46a22b1adedc1b04181490fc36 https://git.kernel.org/stable/c/b2d6f9a5b1cf968f1eaa71085ceeb09c2cb276b1 https://git.kernel.org/stable/c/d75a589bb92af1abf3b779cfcd1977ca11b27033 https://git.kernel.org/stable/c/e2d45f467096e931044f0ab7634499879d851a5c https://git.kernel.org/stable/c/edcf1a3f182ecf8b6b805f0ce90570ea98c5f6bf https://git.kernel.org/stable/c/291cca35818bd52a407bc37ab45a15816039e363 https://git.kernel.org/stable/c/406b0241d0eb598a0b330ab20ae325537d8d8163 https://git.kernel.org/stable/c/5224afbc30c3ca9ba23e752f0f138729b2c48dd8 https://git.kernel.org/stable/c/552705a3650bbf46a22b1adedc1b04181490fc36 https://git.kernel.org/stable/c/b2d6f9a5b1cf968f1eaa71085ceeb09c2cb276b1 https://git.kernel.org/stable/c/d75a589bb92af1abf3b779cfcd1977ca11b27033 https://git.kernel.org/stable/c/e2d45f467096e931044f0ab7634499879d851a5c https://git.kernel.org/stable/c/edcf1a3f182ecf8b6b805f0ce90570ea98c5f6bf

Frequently Asked Questions

What is CVE-2024-26643? +
In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: mark set as dead when unbinding anonymous set with timeout While the rhashtable set gc runs asynchronously, a race allows it to collect elements from anonymous sets with timeouts while it is being released from the commit path. Mingi Cho originally reported this issue in a different path in 6.1.x with a pipapo set with low timeouts which is not possible upstream since 7395dfacfff6 ("netfilter: nf_tables: use timestamp to check for set element timeout"). Fix this by setting on the dead flag for anonymous sets to skip async gc in this case. According to 08e4c8c5919f ("netfilter: nf_tables: mark newset as dead on transaction abort"), Florian plans to accelerate abort path by releasing objects via workqueue, therefore, this sets on the dead flag for abort path too. It has a CVSS v3.1 base score of 5.5 (MEDIUM).
How severe is CVE-2024-26643? +
CVE-2024-26643 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2024-26643? +
CVE-2024-26643 affects products from debian, linux, specifically: debian_linux, linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-26643? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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