CVE-2024-26894

ACPI: processor_idle: Fix memory leak in acpi_processor_power_exit()

MEDIUM

CVSS Score

Published: April 17, 2024 at 10:27 AM UTC

Updated: October 15, 2026 at 01:17 AM UTC

3 products affected across 3 vendorsLinux KernelDebian LinuxSIMATIC S7-1500 TM MFP

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Severity

MEDIUM6

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

Description

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Debian Linux · Debiandrupal

95%

10.0

Linux Kernel · Linux

95%

3.7 ≤ v < 4.19.3114.20 ≤ v < 5.4.2735.11 ≤ v < 5.15.1535.16 ≤ v < 6.1.835.5 ≤ v < 5.10.2146.2 ≤ v < 6.6.236.7 ≤ v < 6.7.116.8 ≤ v < 6.8.23.73d339dcbb56d8d70c1b959aff87d74adc3a84eea

Vendor states this is fixed in 1cbaf4c793b0808532f4e7b40bc4be7cec2c78f2 (fixed)

Vendor states this is fixed in 3d48e5be107429ff5d824e7f2a00d1b610d36fbc (fixed)

Vendor states this is fixed in 8d14a4d0afb49a5b8535d414c782bb334860e73e (fixed)

Vendor states this is fixed in c2a30c81bf3cb9033fa9f5305baf7c377075e2e5 (fixed)

Vendor states this is fixed in cd5c2d0b09d5b6d3f0a7bbabe6761a4997e9dee9 (fixed)

Vendor states this is fixed in d351bcadab6caa6d8ce7159ff4b77e2da35c09fa (fixed)

Vendor states this is fixed in e18afcb7b2a12b635ac10081f943fcf84ddacc51 (fixed)

Vendor states this is fixed in ea96bf3f80625cddba1391a87613356b1b45716d (fixed)

Vendor states this is fixed in fad9bcd4d754cc689c19dc04d2c44b82c1a5d6c8 (fixed)

Vendor states this is fixed in 3.7 (unaffected)

Vendor states this is fixed in 4.19.311 (unaffected)

Vendor states this is fixed in 5.10.214 (unaffected)

Vendor states this is fixed in 5.15.153 (unaffected)

Vendor states this is fixed in 5.4.273 (unaffected)

Vendor states this is fixed in 6.1.83 (unaffected)

Vendor states this is fixed in 6.6.23 (unaffected)

Vendor states this is fixed in 6.7.11 (unaffected)

Vendor states this is fixed in 6.8.2 (unaffected)

Vendor states this is fixed in 6.9 (unaffected)

SIMATIC S7-1500 TM MFP · Siemens

60%

All versions

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references