Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected b7b1bfce0bb68bd8f6e62a28295922785cc63781 before c6395e32935d35e6f935e7caf1c2dac5a95943b4; affected b7b1bfce0bb68bd8f6e62a28295922785cc63781 before df62fdcd004afa72ecbed0e862ebb983acd3aa57; affected b7b1bfce0bb68bd8f6e62a28295922785cc63781 before c7eeba47058532f6077d6a658e38b6698f6ae71a; affected b7b1bfce0bb68bd8f6e62a28295922785cc63781 before 2ad31ce40e8182860b631e37209e93e543790b7c; affected b7b1bfce0bb68bd8f6e62a28295922785cc63781 before 82abd1c37d3bf2a2658b34772c17a25a6f9cca42; affected b7b1bfce0bb68bd8f6e62a28295922785cc63781 before 436b7cc7eae7851c184b671ed7a4a64c750b86f7; affected b7b1bfce0bb68bd8f6e62a28295922785cc63781 before 1f656e483eb4733d62f18dfb206a49b78f60f495; affected b7b1bfce0bb68bd8f6e62a28295922785cc63781 before 06a0716949c22e2aefb648526580671197151acc; affected 973d5956f754cfc306f5e274d71503498f4b0324; affected 3.10.105 before 3.11 |
| Linux / Linux | affected 3.11; unaffected 0 before 3.11; unaffected 4.14.322 through 4.14.*; unaffected 4.19.291 through 4.19.*; unaffected 5.4.251 through 5.4.*; unaffected 5.10.188 through 5.10.*; unaffected 5.15.121 through 5.15.*; unaffected 6.1.40 through 6.1.*; unaffected 6.4.5 through 6.4.*; unaffected 6.5 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/c6395e32935d35e6f935e7caf1c2dac5a95943b4
- https://git.kernel.org/stable/c/df62fdcd004afa72ecbed0e862ebb983acd3aa57
- https://git.kernel.org/stable/c/c7eeba47058532f6077d6a658e38b6698f6ae71a
- https://git.kernel.org/stable/c/2ad31ce40e8182860b631e37209e93e543790b7c
- https://git.kernel.org/stable/c/82abd1c37d3bf2a2658b34772c17a25a6f9cca42
- https://git.kernel.org/stable/c/436b7cc7eae7851c184b671ed7a4a64c750b86f7
- https://git.kernel.org/stable/c/1f656e483eb4733d62f18dfb206a49b78f60f495
- https://git.kernel.org/stable/c/06a0716949c22e2aefb648526580671197151acc
ADP enrichment
No English description supplied.
No references supplied.