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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 id…

Published Apr 17, 2024 · updated Oct 15, 2026 · linux linux kernel

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): [ ] kmalloc_trace+0x29d/0x340 [ ] acpi_processor_power_init+0xf3/0x1c0 [ ] __acpi_processor_start+0xd3/0xf0 [ ] acpi_processor_start+0x2c/0x50 [ ] really_probe+0xe2/0x480 [ ] __driver_probe_device+0x78/0x160 [ ] driver_probe_device+0x1f/0x90 [ ] __driver_attach+0xce/0x1c0 [ ] bus_for_each_dev+0x70/0xc0 [ ] bus_add_driver+0x112/0x210 [ ] driver_register+0x55/0x100 [ ] acpi_processor_driver_init+0x3b/0xc0 [ ] do_one_initcall+0x41/0x300 [ ] kernel_init_freeable+0x320/0x470 [ ] kernel_init+0x16/0x1b0 [ ] ret_from_fork+0x2d/0x50 Fix this by freeing the CPU idle device after unregistering it.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Apr 17, 2024 · NIST NVD

    Detected

    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

  2. Oct 15, 2026 · NIST NVD

    Updated

    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

Affected

  • cpe debian/debian linux10.0
  • cpe linux/linux kernelversion unspecified

Sources

  • CVE.orgVulnerability recordCVE-2024-26894

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2024-26894

    30-day exploitation probability 0.3%

    first.org
  • NIST NVDVulnerability recordCVE-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 0xffff896

    nvd.nist.gov

References

CVE-2024-26894 · ZeroDay Findings