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Red Hat: CVE-2024-26643: kernel: netfilter: nf_tables: mark set as dead when unbinding anonymous set with timeout (Multiple Advisories)

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Red Hat: CVE-2024-26643: kernel: netfilter: nf_tables: mark set as dead when unbinding anonymous set with timeout (Multiple Advisories)

Severity
4
CVSS
(AV:L/AC:H/Au:S/C:N/I:N/A:C)
Published
03/21/2024
Created
05/31/2024
Added
05/30/2024
Modified
12/05/2024

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.

Solution(s)

  • redhat-upgrade-kernel
  • redhat-upgrade-kernel-rt

References

  • CVE-2024-26643
  • RHSA-2024:3306
  • RHSA-2024:3460
  • RHSA-2024:3461
  • RHSA-2024:3618
  • RHSA-2024:3627
  • 查看数 705
  • 已创建
  • 最后回复

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