CVE-2024-26894

MediumCVSS 6.0/10Last modified Oct 15, 2026

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.

Metrics

CVSS 3.1 6.0/10CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H

Weakness enumeration

CWE-770

Affected software

VendorProductVersions
LinuxLinux>= 3d339dcbb56d8d70c1b959aff87d74adc3a84eea, < d351bcadab6caa6d8ce7159ff4b77e2da35c09fa; >= 3d339dcbb56d8d70c1b959aff87d74adc3a84eea, < ea96bf3f80625cddba1391a87613356b1b45716d; >= 3d339dcbb56d8d70c1b959aff87d74adc3a84eea, < c2a30c81bf3cb9033fa9f5305baf7c377075e2e5; >= 3d339dcbb56d8d70c1b959aff87d74adc3a84eea, < 1cbaf4c793b0808532f4e7b40bc4be7cec2c78f2; >= 3d339dcbb56d8d70c1b959aff87d74adc3a84eea, < fad9bcd4d754cc689c19dc04d2c44b82c1a5d6c8; >= 3d339dcbb56d8d70c1b959aff87d74adc3a84eea, < 3d48e5be107429ff5d824e7f2a00d1b610d36fbc; >= 3d339dcbb56d8d70c1b959aff87d74adc3a84eea, < 8d14a4d0afb49a5b8535d414c782bb334860e73e; >= 3d339dcbb56d8d70c1b959aff87d74adc3a84eea, < cd5c2d0b09d5b6d3f0a7bbabe6761a4997e9dee9; >= 3d339dcbb56d8d70c1b959aff87d74adc3a84eea, < e18afcb7b2a12b635ac10081f943fcf84ddacc51
LinuxLinux3.7
SiemensSIMATIC S7-1500 TM MFP - GNU/Linux subsystem< V1.1.1

References

Timeline

Published
Apr 17, 2024
Last modified
Oct 15, 2026
NVD status
Modified

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CVE-2024-26894: Medium severity, CVSS 6.0 | Vulnix