CVE-2024-26740

CVE Details

Release Date:

2024-04-03

Description

In the Linux kernel, the following vulnerability has been resolved:\nnet/sched: act_mirred: use the backlog for mirred ingress\nThe test Davide added in commit ca22da2fbd69 ('act_mirred: use the backlog\nfor nested calls to mirred ingress') hangs our testing VMs every 10 or so\nruns, with the familiar tcp_v4_rcv -> tcp_v4_rcv deadlock reported by\nlockdep.\nThe problem as previously described by Davide (see Link) is that\nif we reverse flow of traffic with the redirect (egress -> ingress)\nwe may reach the same socket which generated the packet. And we may\nstill be holding its socket lock. The common solution to such deadlocks\nis to put the packet in the Rx backlog, rather than run the Rx path\ninline. Do that for all egress -> ingress reversals, not just once\nwe started to nest mirred calls.\nIn the past there was a concern that the backlog indirection will\nlead to loss of error reporting / less accurate stats. But the current\nworkaround does not seem to address the issue.

See more information about CVE-2024-26740 from MITRE CVE dictionary and NIST NVD

CVSS Scoring

NOTE: The following CVSS v3.1 metrics and score provided are preliminary and subject to review.

Base Score:	5.5	CVSS Vector:	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector:	Local network	Attack Complexity:	Low
Privileges Required:	Low	User Interaction:	None
Scope:	Unchanged	Confidentiality Impact:	None
Integrity Impact:	None	Availability Impact:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 8 (kernel)	ELSA-2024-5101	2024-08-08
Oracle Linux version 9 (kernel)	ELSA-2024-9315	2024-11-14