VulnerabilityPublished 3 Jul 2025Updated 5 Nov 2026

CVE-2025-38113: Linux kernel · ACPI: CPPC: Fix NULL pointer dereference when nosmp is used

Affects Linux kernelSource CVE Database V5

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Not known to be exploited · fixed in c6dad167aade4bf0bef9130f2f149f4249fc4ad0 : update Linux kernel when convenient.

Data as of 5 Nov 2026, 21:04 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Exploitation: No evidence of active exploitation and no public proof of concept
Automatable: Attackers cannot reliably automate steps 1–4 of the kill chain
Technical impact: Limited control over the software or limited information exposure

CISA SSVC assessment, 2026-11-05.

Patch

Available – fixed in c6dad167aade4bf0bef9130f2f149f4249fc4ad0, 356d09c7f5bf525086002a34f8bae40b134d1611, 32a48db4cf28ea087214c261da8476db218d08bd +2

Exploitation evidence

Disclosed: evidence found.
CVE published 3 Jul 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 3cc30dd00a580ca0c9c0b01639841cfd72d10129, < c6dad167aade4bf0bef9130f2f149f4249fc4ad0	Fixed in c6dad167aade4bf0bef9130f2f149f4249fc4ad0
LinuxLinux	Affected ≥ 3cc30dd00a580ca0c9c0b01639841cfd72d10129, < 356d09c7f5bf525086002a34f8bae40b134d1611	Fixed in 356d09c7f5bf525086002a34f8bae40b134d1611
LinuxLinux	Affected ≥ 3cc30dd00a580ca0c9c0b01639841cfd72d10129, < 32a48db4cf28ea087214c261da8476db218d08bd	Fixed in 32a48db4cf28ea087214c261da8476db218d08bd
LinuxLinux	Affected ≥ 3cc30dd00a580ca0c9c0b01639841cfd72d10129, < 15eece6c5b05e5f9db0711978c3e3b7f1a2cfe12	Fixed in 15eece6c5b05e5f9db0711978c3e3b7f1a2cfe12
LinuxLinux	Affected ≥ 3cc30dd00a580ca0c9c0b01639841cfd72d10129, < 1a677d0ceb4a5d62117b711a8b2e0aee80d33015	Fixed in 1a677d0ceb4a5d62117b711a8b2e0aee80d33015
LinuxLinux	Affected =5.19	Fixed in–

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 ]

References

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