CVSS 5.5 · Medium EPSS 0,17%
Kerentanan Integer Underflow (Wrap or Wraparound) pada linux kernel. Skor CVSS 3.1 5.5 (Medium) menurut NVD.
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.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
· uraikan di kalkulator | Vendor | Produk | Versi terdampak |
|---|---|---|
| linux | linux kernel | Versi 3.10.105 hingga sebelum 4.14.322 |
| linux | linux kernel | Versi 4.15 hingga sebelum 4.19.291 |
| linux | linux kernel | Versi 4.20 hingga sebelum 5.4.251 |
| linux | linux kernel | Versi 5.5 hingga sebelum 5.10.188 |
| linux | linux kernel | Versi 5.11 hingga sebelum 5.15.121 |
| linux | linux kernel | Versi 5.16 hingga sebelum 6.1.40 |
| linux | linux kernel | Versi 6.2 hingga sebelum 6.4.5 |
| linux | linux kernel | Versi 6.5 rc1 |