Critical 9.1Published May 20, 2024

CVE-2024-35960net/mlx5: Properly link new fs rules into the tree

Updated under an hour ago (Oct 26, 2026, 11:10 PM ET)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Properly link new fs rules into the tree Previously, add_rule_fg would only add newly created rules from the handle into the tree when they had a refcount of 1. On the other hand, create_flow_handle tries hard to find and reference already existing identical rules instead of creating new ones. These two behaviors can result in a situation where create_flow_handle 1) creates a new rule and references it, then 2) in a subsequent step during the same handle creation references it again, resulting in a rule with a refcount of 2 that is not linked into the tree, will have a NULL parent and root and will result in a crash when the flow group is deleted because del_sw_hw_rule, invoked on rule deletion, assumes node->parent is != NULL. This happened in the wild, due to another bug related to incorrect handling of duplicate pkt_reformat ids, which lead to the code in create_flow_handle incorrectly referencing a just-added rule in the same flow handle, resulting in the problem described above. Full details are at [1]. This patch changes add_rule_fg to add new rules without parents into the tree, properly initializing them and avoiding the crash. This makes it more consistent with how rules are added to an FTE in create_flow_handle.

CVSS: 9.1 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Weakness (CWE): CWE-476
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 14, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 74491de937125d0c98c9b9c9208b4105717a3caa before de0139719cdda82806a47580ca0df06fc85e0bd2; 74491de937125d0c98c9b9c9208b4105717a3caa builds before 1263b0b26077b1183c3c45a0a2479573a351d423; 74491de937125d0c98c9b9c9208b4105717a3caa builds before 3d90ca9145f6b97b38d0c2b6b30f6ca6af9c1801; 74491de937125d0c98c9b9c9208b4105717a3caa builds before 7aaee12b804c5e0374e7b132b6ec2158ff33dd64; 74491de937125d0c98c9b9c9208b4105717a3caa builds before 2e8dc5cffc844dacfa79f056dea88002312f253f; 74491de937125d0c98c9b9c9208b4105717a3caa builds before 5cf5337ef701830f173b4eec00a4f984adeb57a0; from 74491de937125d0c98c9b9c9208b4105717a3caa before adf67a03af39095f05d82050f15813d6f700159d; 74491de937125d0c98c9b9c9208b4105717a3caa builds before 7c6782ad4911cbee874e85630226ed389ff2e453	CNA record
linux linux_kernel linux:linux_kernel	from 74491de93712 before de0139719cdd	CISA ADP
Siemens RUGGEDCOM RST2428P siemens:ruggedcom_rst2428p (from the name)	before V3.1	CISA ADP
Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 family siemens:scalance_xc_300_xr_300_xc_400_xr_500wg_xr_500_family (from the name)	all versions not affected	CISA ADP
Siemens SCALANCE XCM-/XRM-/XCH-/XRH-300 family siemens:scalance_xcm_xrm_xch_xrh_300_family (from the name)	before V3.1	CISA ADP
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	before V1.1.1	CISA ADP
linux linux_kernel linux:linux_kernel	from 4.10 before 4.19.313; from 4.20 before 5.4.275; from 5.5 before 5.10.216; from 5.11 before 5.15.156; from 5.16 before 6.1.87; from 6.2 before 6.6.28; from 6.7 before 6.8.7; 6.9; and 2 more ranges	NVD
debian debian_linux debian:debian_linux	10.0	NVD

References

References

https://git.kernel.org/stable/c/de0139719cdda82806a47580ca0df06fc85e0bd2	patch
https://git.kernel.org/stable/c/1263b0b26077b1183c3c45a0a2479573a351d423	patch
https://git.kernel.org/stable/c/3d90ca9145f6b97b38d0c2b6b30f6ca6af9c1801	patch
https://git.kernel.org/stable/c/7aaee12b804c5e0374e7b132b6ec2158ff33dd64	patch
https://git.kernel.org/stable/c/2e8dc5cffc844dacfa79f056dea88002312f253f	patch
https://git.kernel.org/stable/c/5cf5337ef701830f173b4eec00a4f984adeb57a0	patch
https://git.kernel.org/stable/c/adf67a03af39095f05d82050f15813d6f700159d	patch
https://git.kernel.org/stable/c/7c6782ad4911cbee874e85630226ed389ff2e453	patch
https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html	mailing-list, third-party-advisory
https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html	mailing-list, third-party-advisory
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The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.