CVE-2024-35960

See a problem?
Please try reporting it to the source first.
Source
https://cve.org/CVERecord?id=CVE-2024-35960
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-35960.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2024-35960
Downstream
Related
Published
2024-05-20T09:41:51.900Z
Modified
2026-03-20T12:36:45.261758Z
Severity
  • 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H CVSS Calculator
Summary
net/mlx5: Properly link new fs rules into the tree
Details

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

net/mlx5: Properly link new fs rules into the tree

Previously, addrulefg would only add newly created rules from the handle into the tree when they had a refcount of 1. On the other hand, createflowhandle tries hard to find and reference already existing identical rules instead of creating new ones.

These two behaviors can result in a situation where createflowhandle 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 delswhw_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 pktreformat ids, which lead to the code in createflow_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 addrulefg 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 createflowhandle.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/35xxx/CVE-2024-35960.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
74491de937125d0c98c9b9c9208b4105717a3caa
Fixed
de0139719cdda82806a47580ca0df06fc85e0bd2
Fixed
1263b0b26077b1183c3c45a0a2479573a351d423
Fixed
3d90ca9145f6b97b38d0c2b6b30f6ca6af9c1801
Fixed
7aaee12b804c5e0374e7b132b6ec2158ff33dd64
Fixed
2e8dc5cffc844dacfa79f056dea88002312f253f
Fixed
5cf5337ef701830f173b4eec00a4f984adeb57a0
Fixed
adf67a03af39095f05d82050f15813d6f700159d
Fixed
7c6782ad4911cbee874e85630226ed389ff2e453

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-35960.json"