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Red Hat: CVE-2024-26739: kernel: net/sched: act_mirred: don't override retval if we already lost the skb (Multiple Advisories)

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Red Hat: CVE-2024-26739: kernel: net/sched: act_mirred: don't override retval if we already lost the skb (Multiple Advisories)

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
04/03/2024
Created
07/26/2024
Added
07/25/2024
Modified
01/09/2025

Description

In the Linux kernel, the following vulnerability has been resolved: net/sched: act_mirred: don't override retval if we already lost the skb If we're redirecting the skb, and haven't called tcf_mirred_forward(), yet, we need to tell the core to drop the skb by setting the retcode to SHOT. If we have called tcf_mirred_forward(), however, the skb is out of our hands and returning SHOT will lead to UaF. Move the retval override to the error path which actually need it.

Solution(s)

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

References

  • CVE-2024-26739
  • RHSA-2024:4823
  • RHSA-2024:4831
  • RHSA-2024:6997
  • 查看数 702
  • 已创建
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