Description
In the Linux kernel, the following vulnerability has been resolved: ACPI: CPPC: Fix NULL pointer dereference when nosmp is used With nosmp in cmdline, other CPUs are not brought up, leaving their cpc_desc_ptr NULL. CPU0's iteration via for_each_possible_cpu() dereferences these NULL pointers, causing panic. Panic backtrace: [ 0.401123] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000b8 ... [ 0.403255] [<ffffffff809a5818>] cppc_allow_fast_switch+0x6a/0xd4 ... Kernel panic - not syncing: Attempted to kill init! [ rjw: New subject ]
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
3cc30dd00a580ca0c9c0b01639841cfd72d10129 to < 356d09c7f5bf525086002a34f8bae40b134d1611affected3cc30dd00a580ca0c9c0b01639841cfd72d10129 to < c6dad167aade4bf0bef9130f2f149f4249fc4ad0affected3cc30dd00a580ca0c9c0b01639841cfd72d10129 to < 32a48db4cf28ea087214c261da8476db218d08bdaffected3cc30dd00a580ca0c9c0b01639841cfd72d10129 to < 1a677d0ceb4a5d62117b711a8b2e0aee80d33015affected3cc30dd00a580ca0c9c0b01639841cfd72d10129 to < 15eece6c5b05e5f9db0711978c3e3b7f1a2cfe12affected
Linux Linux
Default version status: affected
5.19affected0 to < 5.19unaffected6.1.142 to ≤ 6.1.*unaffected6.6.94 to ≤ 6.6.*unaffected6.12.34 to ≤ 6.12.*unaffected6.15.3 to ≤ 6.15.*unaffected6.16 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/356d09c7f5bf525086002a34f8bae40b134d1611 ↗
- https://git.kernel.org/stable/c/c6dad167aade4bf0bef9130f2f149f4249fc4ad0 ↗
- https://git.kernel.org/stable/c/32a48db4cf28ea087214c261da8476db218d08bd ↗
- https://git.kernel.org/stable/c/1a677d0ceb4a5d62117b711a8b2e0aee80d33015 ↗
- https://git.kernel.org/stable/c/15eece6c5b05e5f9db0711978c3e3b7f1a2cfe12 ↗
- https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html ↗