CVE - CVE-2024-35960

CVE-ID
CVE-2024-35960	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/1263b0b26077b1183c3c45a0a2479573a351d423 URL:https://git.kernel.org/stable/c/1263b0b26077b1183c3c45a0a2479573a351d423 MISC:https://git.kernel.org/stable/c/2e8dc5cffc844dacfa79f056dea88002312f253f URL:https://git.kernel.org/stable/c/2e8dc5cffc844dacfa79f056dea88002312f253f MISC:https://git.kernel.org/stable/c/3d90ca9145f6b97b38d0c2b6b30f6ca6af9c1801 URL:https://git.kernel.org/stable/c/3d90ca9145f6b97b38d0c2b6b30f6ca6af9c1801 MISC:https://git.kernel.org/stable/c/5cf5337ef701830f173b4eec00a4f984adeb57a0 URL:https://git.kernel.org/stable/c/5cf5337ef701830f173b4eec00a4f984adeb57a0 MISC:https://git.kernel.org/stable/c/7aaee12b804c5e0374e7b132b6ec2158ff33dd64 URL:https://git.kernel.org/stable/c/7aaee12b804c5e0374e7b132b6ec2158ff33dd64 MISC:https://git.kernel.org/stable/c/7c6782ad4911cbee874e85630226ed389ff2e453 URL:https://git.kernel.org/stable/c/7c6782ad4911cbee874e85630226ed389ff2e453 MISC:https://git.kernel.org/stable/c/adf67a03af39095f05d82050f15813d6f700159d URL:https://git.kernel.org/stable/c/adf67a03af39095f05d82050f15813d6f700159d MISC:https://git.kernel.org/stable/c/de0139719cdda82806a47580ca0df06fc85e0bd2 URL:https://git.kernel.org/stable/c/de0139719cdda82806a47580ca0df06fc85e0bd2
Assigning CNA
kernel.org
Date Record Created
20240517	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240517)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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