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Red Hat: CVE-2020-35508: CVE-2020-35508 kernel: fork: fix copy_process(CLONE_PARENT) race with the exiting ->real_parent (Multiple Advisories)

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Red Hat: CVE-2020-35508: CVE-2020-35508 kernel: fork: fix copy_process(CLONE_PARENT) race with the exiting ->real_parent (Multiple Advisories)

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
03/26/2021
Created
05/21/2021
Added
05/21/2021
Modified
03/13/2024

Description

A flaw possibility of race condition and incorrect initialization of the process id was found in the Linux kernel child/parent process identification handling while filtering signal handlers. A local attacker is able to abuse this flaw to bypass checks to send any signal to a privileged process.

Solution(s)

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

References

  • CVE-2020-35508
  • RHSA-2021:1578
  • RHSA-2021:1739
  • RHSA-2021:2718
  • RHSA-2021:2719

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