Description
In the Linux kernel, the following vulnerability has been resolved: net/xen-netback: prevent UAF in xenvif_flush_hash() During the list_for_each_entry_rcu iteration call of xenvif_flush_hash, kfree_rcu does not exist inside the rcu read critical section, so if kfree_rcu is called when the rcu grace period ends during the iteration, UAF occurs when accessing head->next after the entry becomes free. Therefore, to solve this, you need to change it to list_for_each_entry_safe.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
40d8abdee806d496a60ee607a6d01b1cd7fabaf0 to < 3c4423b0c4b98213b3438e15061e1d08220e6982affected40d8abdee806d496a60ee607a6d01b1cd7fabaf0 to < a7f0073fcd12ed7de185ef2c0af9d0fa1ddef22caffected40d8abdee806d496a60ee607a6d01b1cd7fabaf0 to < a0465723b8581cad27164c9073fd780904cd22d4affected40d8abdee806d496a60ee607a6d01b1cd7fabaf0 to < efcff6ce7467f01f0753609f420333f3f2cecedaaffected40d8abdee806d496a60ee607a6d01b1cd7fabaf0 to < 143edf098b80669d05245b2f2367dd156a83a2c5affected40d8abdee806d496a60ee607a6d01b1cd7fabaf0 to < d408889d4b54f5501e4becc4dbbb9065143fbf4eaffected40d8abdee806d496a60ee607a6d01b1cd7fabaf0 to < 54d8639af5568fc41c0e274fc3ec9cf86c59fcbbaffected40d8abdee806d496a60ee607a6d01b1cd7fabaf0 to < 0fa5e94a1811d68fbffa0725efe6d4ca62c03d12affected
Linux Linux
Default version status: affected
4.7affected0 to < 4.7unaffected5.4.290 to ≤ 5.4.*unaffected5.10.227 to ≤ 5.10.*unaffected5.15.168 to ≤ 5.15.*unaffected6.1.113 to ≤ 6.1.*unaffected6.6.55 to ≤ 6.6.*unaffected6.10.14 to ≤ 6.10.*unaffected6.11.3 to ≤ 6.11.*unaffected6.12 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/3c4423b0c4b98213b3438e15061e1d08220e6982 ↗
- https://git.kernel.org/stable/c/a7f0073fcd12ed7de185ef2c0af9d0fa1ddef22c ↗
- https://git.kernel.org/stable/c/a0465723b8581cad27164c9073fd780904cd22d4 ↗
- https://git.kernel.org/stable/c/efcff6ce7467f01f0753609f420333f3f2ceceda ↗
- https://git.kernel.org/stable/c/143edf098b80669d05245b2f2367dd156a83a2c5 ↗
- https://git.kernel.org/stable/c/d408889d4b54f5501e4becc4dbbb9065143fbf4e ↗
- https://git.kernel.org/stable/c/54d8639af5568fc41c0e274fc3ec9cf86c59fcbb ↗
- https://git.kernel.org/stable/c/0fa5e94a1811d68fbffa0725efe6d4ca62c03d12 ↗
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html ↗
- https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html ↗