vulnerability

Oracle Linux: CVE-2024-26643: ELSA-2024-3618: kernel update (MODERATE) (Multiple Advisories)

Severity
4
CVSS
(AV:L/AC:H/Au:S/C:N/I:N/A:C)
Published
03/21/2024
Added
05/25/2024
Modified
01/07/2025

Description

In the Linux kernel, the following vulnerability has been resolved:
netfilter: nf_tables: mark set as dead when unbinding anonymous set with timeout
While the rhashtable set gc runs asynchronously, a race allows it to
collect elements from anonymous sets with timeouts while it is being
released from the commit path.
Mingi Cho originally reported this issue in a different path in 6.1.x
with a pipapo set with low timeouts which is not possible upstream since
7395dfacfff6 ("netfilter: nf_tables: use timestamp to check for set
element timeout").
Fix this by setting on the dead flag for anonymous sets to skip async gc
in this case.
According to 08e4c8c5919f ("netfilter: nf_tables: mark newset as dead on
transaction abort"), Florian plans to accelerate abort path by releasing
objects via workqueue, therefore, this sets on the dead flag for abort
path too.
A vulnerability was found in the netfilter/nf_tables subsystem of Linux Kernel, where a race condition caused where the garbage collector could prematurely collect elements from anonymous sets with timeouts while they were being released.

Solution

oracle-linux-upgrade-kernel
Title
NEW

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