CVE-2024-50249

CVE Details

Release Date:

2024-11-09

Description

In the Linux kernel, the following vulnerability has been resolved:\nACPI: CPPC: Make rmw_lock a raw_spin_lock\nThe following BUG was triggered:\n=============================\n[ BUG: Invalid wait context ]\n6.12.0-rc2-XXX #406 Not tainted\n-----------------------------\nkworker/1:1/62 is trying to lock:\nffffff8801593030 (&cpc_ptr->rmw_lock){+.+.}-{3:3}, at: cpc_write+0xcc/0x370\nother info that might help us debug this:\ncontext-{5:5}\n2 locks held by kworker/1:1/62:\n#0: ffffff897ef5ec98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2c/0x50\n#1: ffffff880154e238 (&sg_policy->update_lock){....}-{2:2}, at: sugov_update_shared+0x3c/0x280\nstack backtrace:\nCPU: 1 UID: 0 PID: 62 Comm: kworker/1:1 Not tainted 6.12.0-rc2-g9654bd3e8806 #406\nWorkqueue: 0x0 (events)\nCall trace:\ndump_backtrace+0xa4/0x130\nshow_stack+0x20/0x38\ndump_stack_lvl+0x90/0xd0\ndump_stack+0x18/0x28\n__lock_acquire+0x480/0x1ad8\nlock_acquire+0x114/0x310\n_raw_spin_lock+0x50/0x70\ncpc_write+0xcc/0x370\ncppc_set_perf+0xa0/0x3a8\ncppc_cpufreq_fast_switch+0x40/0xc0\ncpufreq_driver_fast_switch+0x4c/0x218\nsugov_update_shared+0x234/0x280\nupdate_load_avg+0x6ec/0x7b8\ndequeue_entities+0x108/0x830\ndequeue_task_fair+0x58/0x408\n__schedule+0x4f0/0x1070\nschedule+0x54/0x130\nworker_thread+0xc0/0x2e8\nkthread+0x130/0x148\nret_from_fork+0x10/0x20\nsugov_update_shared() locks a raw_spinlock while cpc_write() locks a\nspinlock.\nTo have a correct wait-type order, update rmw_lock to a raw spinlock and\nensure that interrupts will be disabled on the CPU holding it.\n[ rjw: Changelog edits ]

See more information about CVE-2024-50249 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	5.5
Vector String:	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Version:	3.1
Attack Vector:	Local
Attack Complexity:	Low
Privileges Required:	Low
User Interaction:	None
Scope:	Unchanged
Confidentiality:	None
Integrity:	None
Availability:	High

Errata information

Platform	Errata	Release Date
Oracle Linux version 8 (kernel-uek)	ELSA-2024-12887	2024-12-18
Oracle Linux version 9 (kernel-uek)	ELSA-2024-12887	2024-12-18