Description
In the Linux kernel, the following vulnerability has been resolved: kprobes: Protect kprobe_blacklist with RCU __within_kprobe_blacklist() traverses kprobe_blacklist without holding kprobe_mutex. When a module is unloaded, kprobe_remove_area_blacklist() removes blacklist entries and immediately frees them with kfree(). A concurrent call to within_kprobe_blacklist() can therefore dereference freed memory. Furthermore, within_kprobe_blacklist() can be called in atomic or non-preemptible contexts where the sleeping kprobe_mutex cannot be taken. Protect kprobe_blacklist with RCU. Use guard(rcu)() and list_for_each_entry_rcu() for traversal, list_add_tail_rcu() for insertions, list_del_rcu() for deletions, and kfree_rcu() to reclaim entries safely after a grace period.
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
376e242429bf8539ef39a080ac113c8799840b13 to < 3fb8386682ef4d0858c38bf0d8d8a47ba171fa23affected376e242429bf8539ef39a080ac113c8799840b13 to < 5d97a13defc648c64d138145ace429b6a3d08943affected376e242429bf8539ef39a080ac113c8799840b13 to < 8f406205003f741225f620f0e357ca0de71d45e3affected376e242429bf8539ef39a080ac113c8799840b13 to < 630ed8734a02b992e8a97538179c2ece42c5210faffected376e242429bf8539ef39a080ac113c8799840b13 to < 518d9b5568bb06f86e4434f7a30faa9612ea91adaffected376e242429bf8539ef39a080ac113c8799840b13 to < 5da247e4d1e8661d4d6f997101d59967e8994e32affected376e242429bf8539ef39a080ac113c8799840b13 to < 6e62cf983a2bd547e6bbd3f935539233e5f97f8faffected376e242429bf8539ef39a080ac113c8799840b13 to < 0c4256196b3a105307e2235fbfd85e768bbcdd0faffected
Linux Linux
Default version status: affected
3.16affected0 to < 3.16unaffected5.10.273 to ≤ 5.10.*unaffected5.15.224 to ≤ 5.15.*unaffected6.1.188 to ≤ 6.1.*unaffected6.6.157 to ≤ 6.6.*unaffected6.12.110 to ≤ 6.12.*unaffected6.18.51 to ≤ 6.18.*unaffected7.2.5 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/3fb8386682ef4d0858c38bf0d8d8a47ba171fa23 ↗
- https://git.kernel.org/stable/c/5d97a13defc648c64d138145ace429b6a3d08943 ↗
- https://git.kernel.org/stable/c/8f406205003f741225f620f0e357ca0de71d45e3 ↗
- https://git.kernel.org/stable/c/630ed8734a02b992e8a97538179c2ece42c5210f ↗
- https://git.kernel.org/stable/c/518d9b5568bb06f86e4434f7a30faa9612ea91ad ↗
- https://git.kernel.org/stable/c/5da247e4d1e8661d4d6f997101d59967e8994e32 ↗
- https://git.kernel.org/stable/c/6e62cf983a2bd547e6bbd3f935539233e5f97f8f ↗
- https://git.kernel.org/stable/c/0c4256196b3a105307e2235fbfd85e768bbcdd0f ↗