CVE-2024-26894: ACPI: processor_idle: Fix memory leak in acpi_processor_power_exit()
First published: Wed Apr 17 2024(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 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.
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <4.19.311 | 4.19.311 |
| redhat/kernel | <5.4.273 | 5.4.273 |
| redhat/kernel | <5.10.214 | 5.10.214 |
| redhat/kernel | <5.15.153 | 5.15.153 |
| redhat/kernel | <6.1.83 | 6.1.83 |
| redhat/kernel | <6.6.23 | 6.6.23 |
| redhat/kernel | <6.7.11 | 6.7.11 |
| redhat/kernel | <6.8.2 | 6.8.2 |
| redhat/kernel | <6.9 | 6.9 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.12.5-1 6.12.6-1 |
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Reference Links
- 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://launchpad.net/bugs/cve/CVE-2024-26894
- https://access.redhat.com/security/cve/CVE-2024-26894
- https://lore.kernel.org/linux-cve-announce/2024041743-CVE-2024-26894-53ad@gregkh/T
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2275662
- https://access.redhat.com/errata/RHSA-2024:7001
- https://access.redhat.com/errata/RHSA-2024:7000
- https://slopegame3d.org/
- https://access.redhat.com/errata/RHSA-2024:9315
- https://bugzilla.redhat.com/show_bug.cgi?id=2275661
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26894
- https://nvd.nist.gov/vuln/detail/CVE-2024-26894
- https://security-tracker.debian.org/tracker/CVE-2024-26894
- https://ubuntu.com/security/CVE-2024-26894
- https://git.kernel.org/linus/e18afcb7b2a12b635ac10081f943fcf84ddacc51
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
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