CVE-2024-26894

MEDIUM
Published Apr 17, 2024 Modified May 12, 2026 CWE-770

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.

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CVSS v3.1 Score

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

Weakness Type (CWE)

CWE-770 CWE-770

Affected Products

Vendor Product
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
linux linux_kernel
debian debian_linux

References

Advisories & Patches

https://git.kernel.org/stable/c/1cbaf4c793b0808532f4e7b40bc4be7cec2c78f2 https://git.kernel.org/stable/c/3d48e5be107429ff5d824e7f2a00d1b610d36fbc https://git.kernel.org/stable/c/8d14a4d0afb49a5b8535d414c782bb334860e73e https://git.kernel.org/stable/c/c2a30c81bf3cb9033fa9f5305baf7c377075e2e5 https://git.kernel.org/stable/c/cd5c2d0b09d5b6d3f0a7bbabe6761a4997e9dee9 https://git.kernel.org/stable/c/d351bcadab6caa6d8ce7159ff4b77e2da35c09fa https://git.kernel.org/stable/c/e18afcb7b2a12b635ac10081f943fcf84ddacc51 https://git.kernel.org/stable/c/ea96bf3f80625cddba1391a87613356b1b45716d https://git.kernel.org/stable/c/fad9bcd4d754cc689c19dc04d2c44b82c1a5d6c8 https://git.kernel.org/stable/c/1cbaf4c793b0808532f4e7b40bc4be7cec2c78f2 https://git.kernel.org/stable/c/3d48e5be107429ff5d824e7f2a00d1b610d36fbc https://git.kernel.org/stable/c/8d14a4d0afb49a5b8535d414c782bb334860e73e https://git.kernel.org/stable/c/c2a30c81bf3cb9033fa9f5305baf7c377075e2e5 https://git.kernel.org/stable/c/cd5c2d0b09d5b6d3f0a7bbabe6761a4997e9dee9 https://git.kernel.org/stable/c/d351bcadab6caa6d8ce7159ff4b77e2da35c09fa https://git.kernel.org/stable/c/e18afcb7b2a12b635ac10081f943fcf84ddacc51 https://git.kernel.org/stable/c/ea96bf3f80625cddba1391a87613356b1b45716d https://git.kernel.org/stable/c/fad9bcd4d754cc689c19dc04d2c44b82c1a5d6c8

Frequently Asked Questions

What is CVE-2024-26894? +
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. It has a CVSS v3.1 base score of 6.0 (MEDIUM).
How severe is CVE-2024-26894? +
CVE-2024-26894 has a CVSS v3.1 score of 6.0 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2024-26894? +
CVE-2024-26894 affects products from debian, linux, specifically: debian_linux, linux_kernel. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2024-26894? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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