{"id":"CVE-2025-38113","title":"ACPI: CPPC: Fix NULL pointer dereference when nosmp is used","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: CPPC: Fix NULL pointer dereference when nosmp is used\n\nWith nosmp in cmdline, other CPUs are not brought up, leaving\ntheir cpc_desc_ptr NULL. CPU0's iteration via…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 3cc30dd00a580ca0c9c0b01639841cfd72d10129 < 356d09c7f5bf525086002a34f8bae40b134d1611","Linux >= 3cc30dd00a580ca0c9c0b01639841cfd72d10129 < c6dad167aade4bf0bef9130f2f149f4249fc4ad0","Linux >= 3cc30dd00a580ca0c9c0b01639841cfd72d10129 < 32a48db4cf28ea087214c261da8476db218d08bd","Linux >= 3cc30dd00a580ca0c9c0b01639841cfd72d10129 < 1a677d0ceb4a5d62117b711a8b2e0aee80d33015","Linux >= 3cc30dd00a580ca0c9c0b01639841cfd72d10129 < 15eece6c5b05e5f9db0711978c3e3b7f1a2cfe12","Linux 5.19"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:49:52.300331Z"},"published":"2025-07-03","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:52:16.256Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2025-38113","references":[{"url":"https://git.kernel.org/stable/c/356d09c7f5bf525086002a34f8bae40b134d1611"},{"url":"https://git.kernel.org/stable/c/c6dad167aade4bf0bef9130f2f149f4249fc4ad0"},{"url":"https://git.kernel.org/stable/c/32a48db4cf28ea087214c261da8476db218d08bd"},{"url":"https://git.kernel.org/stable/c/1a677d0ceb4a5d62117b711a8b2e0aee80d33015"},{"url":"https://git.kernel.org/stable/c/15eece6c5b05e5f9db0711978c3e3b7f1a2cfe12"}],"tags":["cve.org"],"epss":0.00195,"epssPercentile":0.09289,"ingestedAt":"2026-11-05T22:38:31.920Z","slug":"CVE-2025-38113","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nACPI: CPPC: Fix NULL pointer dereference when nosmp is used\n\nWith nosmp in cmdline, other CPUs are not brought up, leaving\ntheir cpc_desc_ptr NULL. CPU0's iteration via for_each_possible_cpu()\ndereferences these NULL pointers, causing panic.\n\nPanic backtrace:\n\n[    0.401123] Unable to handle kernel NULL pointer dereference at virtual address 00000000000000b8\n...\n[    0.403255] [<ffffffff809a5818>] cppc_allow_fast_switch+0x6a/0xd4\n...\nKernel panic - not syncing: Attempted to kill init!\n\n[ rjw: New subject ]\n\n## Affected\n\n- `Linux >= 3cc30dd00a580ca0c9c0b01639841cfd72d10129 < 356d09c7f5bf525086002a34f8bae40b134d1611`\n- `Linux >= 3cc30dd00a580ca0c9c0b01639841cfd72d10129 < c6dad167aade4bf0bef9130f2f149f4249fc4ad0`\n- `Linux >= 3cc30dd00a580ca0c9c0b01639841cfd72d10129 < 32a48db4cf28ea087214c261da8476db218d08bd`\n- `Linux >= 3cc30dd00a580ca0c9c0b01639841cfd72d10129 < 1a677d0ceb4a5d62117b711a8b2e0aee80d33015`\n- `Linux >= 3cc30dd00a580ca0c9c0b01639841cfd72d10129 < 15eece6c5b05e5f9db0711978c3e3b7f1a2cfe12`\n- `Linux 5.19`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}