CVE - CVE-2024-26740

CVE-ID
CVE-2024-26740	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/sched: act_mirred: use the backlog for mirred ingress The test Davide added in commit ca22da2fbd69 ("act_mirred: use the backlog for nested calls to mirred ingress") hangs our testing VMs every 10 or so runs, with the familiar tcp_v4_rcv -> tcp_v4_rcv deadlock reported by lockdep. The problem as previously described by Davide (see Link) is that if we reverse flow of traffic with the redirect (egress -> ingress) we may reach the same socket which generated the packet. And we may still be holding its socket lock. The common solution to such deadlocks is to put the packet in the Rx backlog, rather than run the Rx path inline. Do that for all egress -> ingress reversals, not just once we started to nest mirred calls. In the past there was a concern that the backlog indirection will lead to loss of error reporting / less accurate stats. But the current workaround does not seem to address the issue.
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/52f671db18823089a02f07efc04efdb2272ddc17 URL:https://git.kernel.org/stable/c/52f671db18823089a02f07efc04efdb2272ddc17 MISC:https://git.kernel.org/stable/c/60ddea1600bc476e0f5e02bce0e29a460ccbf0be URL:https://git.kernel.org/stable/c/60ddea1600bc476e0f5e02bce0e29a460ccbf0be MISC:https://git.kernel.org/stable/c/7c787888d164689da8b1b115f3ef562c1e843af4 URL:https://git.kernel.org/stable/c/7c787888d164689da8b1b115f3ef562c1e843af4
Assigning CNA
kernel.org
Date Record Created
20240219	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 (20240219)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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