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Red Hat: CVE-2023-52522: kernel: net: fix possible store tearing in neigh_periodic_work() (Multiple Advisories)

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Red Hat: CVE-2023-52522: kernel: net: fix possible store tearing in neigh_periodic_work() (Multiple Advisories)

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
03/02/2024
Created
09/26/2024
Added
09/25/2024
Modified
12/05/2024

Description

In the Linux kernel, the following vulnerability has been resolved: net: fix possible store tearing in neigh_periodic_work() While looking at a related syzbot report involving neigh_periodic_work(), I found that I forgot to add an annotation when deleting an RCU protected item from a list. Readers use rcu_deference(*np), we need to use either rcu_assign_pointer() or WRITE_ONCE() on writer side to prevent store tearing. I use rcu_assign_pointer() to have lockdep support, this was the choice made in neigh_flush_dev().

Solution(s)

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

References

  • CVE-2023-52522
  • RHSA-2024:2394
  • RHSA-2024:6993
  • RHSA-2024:7000
  • RHSA-2024:7001
  • RHSA-2024:9497
  • RHSA-2024:9498
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