Medium 6.0Published Apr 17, 2024

CVE-2024-26894ACPI: processor_idle: Fix memory leak in acpi_processor_power_exit()

Updated under an hour ago (2026-10-19 07:23 UTC)

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Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: ACPI: processor_idle: Fix memory leak in acpi_processor_power_exit() After unregistering the CPU idle device, the memory associated with it is not freed, leading to a memory leak: unreferenced object 0xffff896282f6c000 (size 1024): comm "swapper/0", pid 1, jiffies 4294893170 hex dump (first 32 bytes): 00 00 00 00 0b 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace (crc 8836a742): [<ffffffff993495ed>] kmalloc_trace+0x29d/0x340 [<ffffffff9972f3b3>] acpi_processor_power_init+0xf3/0x1c0 [<ffffffff9972d263>] __acpi_processor_start+0xd3/0xf0 [<ffffffff9972d2bc>] acpi_processor_start+0x2c/0x50 [<ffffffff99805872>] really_probe+0xe2/0x480 [<ffffffff99805c98>] __driver_probe_device+0x78/0x160 [<ffffffff99805daf>] driver_probe_device+0x1f/0x90 [<ffffffff9980601e>] __driver_attach+0xce/0x1c0 [<ffffffff99803170>] bus_for_each_dev+0x70/0xc0 [<ffffffff99804822>] bus_add_driver+0x112/0x210 [<ffffffff99807245>] driver_register+0x55/0x100 [<ffffffff9aee4acb>] acpi_processor_driver_init+0x3b/0xc0 [<ffffffff990012d1>] do_one_initcall+0x41/0x300 [<ffffffff9ae7c4b0>] kernel_init_freeable+0x320/0x470 [<ffffffff99b231f6>] kernel_init+0x16/0x1b0 [<ffffffff99042e6d>] ret_from_fork+0x2d/0x50 Fix this by freeing the CPU idle device after unregistering it.

CVSS: 6.0 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H
Weakness (CWE): CWE-770
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 15, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 3d339dcbb56d8d70c1b959aff87d74adc3a84eea before d351bcadab6caa6d8ce7159ff4b77e2da35c09fa; from 3d339dcbb56d8d70c1b959aff87d74adc3a84eea before ea96bf3f80625cddba1391a87613356b1b45716d; from 3d339dcbb56d8d70c1b959aff87d74adc3a84eea before c2a30c81bf3cb9033fa9f5305baf7c377075e2e5; 3d339dcbb56d8d70c1b959aff87d74adc3a84eea builds before 1cbaf4c793b0808532f4e7b40bc4be7cec2c78f2; from 3d339dcbb56d8d70c1b959aff87d74adc3a84eea before fad9bcd4d754cc689c19dc04d2c44b82c1a5d6c8; 3d339dcbb56d8d70c1b959aff87d74adc3a84eea builds before 3d48e5be107429ff5d824e7f2a00d1b610d36fbc; from 3d339dcbb56d8d70c1b959aff87d74adc3a84eea before 8d14a4d0afb49a5b8535d414c782bb334860e73e; from 3d339dcbb56d8d70c1b959aff87d74adc3a84eea before cd5c2d0b09d5b6d3f0a7bbabe6761a4997e9dee9; and 1 more ranges	CNA record
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	before V1.1.1	CISA ADP
linux linux_kernel linux:linux_kernel	from 3.7 before 4.19.311; from 4.20 before 5.4.273; from 5.5 before 5.10.214; from 5.11 before 5.15.153; from 5.16 before 6.1.83; from 6.2 before 6.6.23; from 6.7 before 6.7.11; from 6.8 before 6.8.2	NVD
debian debian_linux debian:debian_linux	10.0	NVD

References

https://git.kernel.org/stable/c/d351bcadab6caa6d8ce7159ff4b77e2da35c09fapatch
https://git.kernel.org/stable/c/ea96bf3f80625cddba1391a87613356b1b45716dpatch
https://git.kernel.org/stable/c/c2a30c81bf3cb9033fa9f5305baf7c377075e2e5patch
https://git.kernel.org/stable/c/1cbaf4c793b0808532f4e7b40bc4be7cec2c78f2patch
https://git.kernel.org/stable/c/fad9bcd4d754cc689c19dc04d2c44b82c1a5d6c8patch
https://git.kernel.org/stable/c/3d48e5be107429ff5d824e7f2a00d1b610d36fbcpatch
https://git.kernel.org/stable/c/8d14a4d0afb49a5b8535d414c782bb334860e73epatch
https://git.kernel.org/stable/c/cd5c2d0b09d5b6d3f0a7bbabe6761a4997e9dee9patch
https://git.kernel.org/stable/c/e18afcb7b2a12b635ac10081f943fcf84ddacc51patch
https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlmailing-list, third-party-advisory
https://lists.debian.org/debian-lts-announce/2024/06/msg00020.htmlmailing-list, third-party-advisory
https://cert-portal.siemens.com/productcert/html/ssa-265688.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.