CVE-2023-52522
net: fix possible store tearing in neigh_periodic_work()
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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().
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/147d89ee41434b97043c2dcb17a97dc151859baa
- https://git.kernel.org/stable/c/25563b581ba3a1f263a00e8c9a97f5e7363be6fd
- https://git.kernel.org/stable/c/2ea52a2fb8e87067e26bbab4efb8872639240eb0
- https://git.kernel.org/stable/c/95eabb075a5902f4c0834ab1fb12dc35730c05af
- https://git.kernel.org/stable/c/a75152d233370362eebedb2643592e7c883cc9fc
References (6)
SSVC — Action Prioritization
SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- NONE
- Integrity
- NONE
- Availability
- HIGH
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