CVE-2024-26894

ACPI: processor_idle: Fix memory leak in acpi_processor_power_exit()

State: Published
Severity: 6.0 Medium
Published: Apr 17, 2024
Updated: Oct 15, 2026
Reserved: Feb 19, 2024

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.

Scores

CVSS	Score	Vector	Source
3.1	6.0 Medium	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H	CISA-ADP

Weaknesses

CWE-770 Allocation of Resources Without Limits or Throttling

Affected Products

Product	Versions
LinuxLinux	3d339dcbb56d8d70c1b959aff87d74adc3a84eea to before d351bcadab6caa6d8ce7159ff4b77e2da35c09faAffected 3d339dcbb56d8d70c1b959aff87d74adc3a84eea to before ea96bf3f80625cddba1391a87613356b1b45716dAffected 3d339dcbb56d8d70c1b959aff87d74adc3a84eea to before c2a30c81bf3cb9033fa9f5305baf7c377075e2e5Affected 3d339dcbb56d8d70c1b959aff87d74adc3a84eea to before 1cbaf4c793b0808532f4e7b40bc4be7cec2c78f2Affected 3d339dcbb56d8d70c1b959aff87d74adc3a84eea to before fad9bcd4d754cc689c19dc04d2c44b82c1a5d6c8Affected 3d339dcbb56d8d70c1b959aff87d74adc3a84eea to before 3d48e5be107429ff5d824e7f2a00d1b610d36fbcAffected 3d339dcbb56d8d70c1b959aff87d74adc3a84eea to before 8d14a4d0afb49a5b8535d414c782bb334860e73eAffected 3d339dcbb56d8d70c1b959aff87d74adc3a84eea to before cd5c2d0b09d5b6d3f0a7bbabe6761a4997e9dee9Affected 3d339dcbb56d8d70c1b959aff87d74adc3a84eea to before e18afcb7b2a12b635ac10081f943fcf84ddacc51Affected
LinuxLinux	3.7Affected before 3.7Not affected 4.19.311 through 4.19.Not affected 5.4.273 through 5.4.Not affected 5.10.214 through 5.10.Not affected 5.15.153 through 5.15.Not affected 6.1.83 through 6.1.Not affected 6.6.23 through 6.6.Not affected 6.7.11 through 6.7.Not affected 6.8.2 through 6.8.Not affected 6.9 and laterNot affected

Product

Versions

LinuxLinux

3d339dcbb56d8d70c1b959aff87d74adc3a84eea to before d351bcadab6caa6d8ce7159ff4b77e2da35c09faAffected
3d339dcbb56d8d70c1b959aff87d74adc3a84eea to before ea96bf3f80625cddba1391a87613356b1b45716dAffected
3d339dcbb56d8d70c1b959aff87d74adc3a84eea to before c2a30c81bf3cb9033fa9f5305baf7c377075e2e5Affected
3d339dcbb56d8d70c1b959aff87d74adc3a84eea to before 1cbaf4c793b0808532f4e7b40bc4be7cec2c78f2Affected
3d339dcbb56d8d70c1b959aff87d74adc3a84eea to before fad9bcd4d754cc689c19dc04d2c44b82c1a5d6c8Affected
3d339dcbb56d8d70c1b959aff87d74adc3a84eea to before 3d48e5be107429ff5d824e7f2a00d1b610d36fbcAffected
3d339dcbb56d8d70c1b959aff87d74adc3a84eea to before 8d14a4d0afb49a5b8535d414c782bb334860e73eAffected
3d339dcbb56d8d70c1b959aff87d74adc3a84eea to before cd5c2d0b09d5b6d3f0a7bbabe6761a4997e9dee9Affected
3d339dcbb56d8d70c1b959aff87d74adc3a84eea to before e18afcb7b2a12b635ac10081f943fcf84ddacc51Affected

LinuxLinux

3.7Affected
before 3.7Not affected
4.19.311 through 4.19.*Not affected
5.4.273 through 5.4.*Not affected
5.10.214 through 5.10.*Not affected
5.15.153 through 5.15.*Not affected
6.1.83 through 6.1.*Not affected
6.6.23 through 6.6.*Not affected
6.7.11 through 6.7.*Not affected
6.8.2 through 6.8.*Not affected
6.9 and laterNot affected

References

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