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CVE-2024-26643— netfilter: nf_tables: mark set as dead when unbinding anonymous set with timeout

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于netfilter:nf_tables在超时解除绑定匿名集时将匿名集标记为dead。

CVSS 7.8 · High EPSS 0.20% · P10

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 23

VendorProduct Version RangeStatus
Linux Linux 8da1b048f9a501d3d7d38c188ba09d7d0d5b8c27< d75a589bb92af1abf3b779cfcd1977ca11b27033 affected
bbdb3b65aa91aa0a32b212f27780b28987f2d94f< edcf1a3f182ecf8b6b805f0ce90570ea98c5f6bf affected
448be0774882f95a74fa5eb7519761152add601b< e2d45f467096e931044f0ab7634499879d851a5c affected
d19e8bf3ea4114dd21fc35da21f398203d7f7df1< 291cca35818bd52a407bc37ab45a15816039e363 affected
ea3eb9f2192e4fc33b795673e56c97a21987f868< 406b0241d0eb598a0b330ab20ae325537d8d8163 affected
5f68718b34a531a556f2f50300ead2862278da26< b2d6f9a5b1cf968f1eaa71085ceeb09c2cb276b1 affected
5f68718b34a531a556f2f50300ead2862278da26< 5224afbc30c3ca9ba23e752f0f138729b2c48dd8 affected
5f68718b34a531a556f2f50300ead2862278da26< 552705a3650bbf46a22b1adedc1b04181490fc36 affected
… +15 more rows
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I. Basic Information for CVE-2024-26643

Vulnerability Information
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Vulnerability Title
netfilter: nf_tables: mark set as dead when unbinding anonymous set with timeout
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于netfilter:nf_tables在超时解除绑定匿名集时将匿名集标记为dead。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 8da1b048f9a501d3d7d38c188ba09d7d0d5b8c27 ~ d75a589bb92af1abf3b779cfcd1977ca11b27033 -
Linux Linux 6.5 -

II. Public POCs for CVE-2024-26643

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III. Intelligence Information for CVE-2024-26643

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Patches & Fixes for CVE-2024-26643 (1)

Mailing List Discussions for CVE-2024-26643 (1)

Other References for CVE-2024-26643 (7)

Same Patch Batch · Linux · 2024-03-21 · 3 CVEs total

CVE-2023-52620 7.8 HIGH netfilter: nf_tables: disallow timeout for anonymous sets
CVE-2024-26642 7.8 HIGH netfilter: nf_tables: disallow anonymous set with timeout flag

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-26643

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