CVE-2023-52522
Published: March 5, 2024Last modified: March 5, 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().
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 5.5 |
| Attack Vector | LOCAL |
| Attack complexity | LOW |
| Privileges required | LOW |
| User interaction | NONE |
| Scope | UNCHANGED |
| Confidentiality | NONE |
| Integrity impact | NONE |
| Availability impact | HIGH |
| Vector | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Fixed (6.1.62-r0) |
| Stream | linux-lts | Fixed (6.6.58-r0) |
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
- https://git.kernel.org/stable/c/f82aac8162871e87027692b36af335a2375d4580