Tracker / CVE-2023-53189
CVE-2023-53189
In the Linux kernel, the following vulnerability has been resolved: ipv6/addrconf: fix a potential refcount underflow for idev Now in addrconf_mod_rs_timer(), reference idev depends on whether rs_timer is not pending. Then modify rs_timer timeout. There is a time gap in [1], during which if the pending rs_timer becomes not pending. It will miss to hold idev, but the rs_timer is activated. Thus rs_timer callback function addrconf_rs_timer() will be executed and put idev later without holding idev. A refcount underflow issue for idev can be caused by this. if (!timer_pending(&idev->rs_timer)) in6_dev_hold(idev); <--------------[1] mod_timer(&idev->rs_timer, jiffies + when); To fix the issue, hold idev if mod_timer() return 0.
Prodotti e versioni affette
| linux | linux_kernel |
|---|---|
| linux | linux_kernel · 3.10.105 → 4.14.322 |
| linux | linux_kernel · 4.15 → 4.19.291 |
| linux | linux_kernel · 4.20 → 5.4.251 |
| linux | linux_kernel · 5.11 → 5.15.121 |
| linux | linux_kernel · 5.16 → 6.1.40 |
| linux | linux_kernel · 5.5 → 5.10.188 |
| linux | linux_kernel · 6.2 → 6.4.5 |