CVE-2024-50249 Affecting kernel-uek package, versions <0:5.15.0-303.171.5.2.el9uek
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-ORACLE9-KERNELUEK-8530407
- published19 Dec 2024
- disclosed9 Nov 2024
Introduced: 9 Nov 2024
CVE-2024-50249 (opens in a new tab)How to fix?
Upgrade Oracle:9 kernel-uek to version 0:5.15.0-303.171.5.2.el9uek or higher.
This issue was patched in ELSA-2024-12887.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-uek package and not the kernel-uek package as distributed by Oracle.
See How to fix? for Oracle:9 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
ACPI: CPPC: Make rmw_lock a raw_spin_lock
The following BUG was triggered:
============================= [ BUG: Invalid wait context ] 6.12.0-rc2-XXX #406 Not tainted
kworker/1:1/62 is trying to lock: ffffff8801593030 (&cpc_ptr->rmw_lock){+.+.}-{3:3}, at: cpc_write+0xcc/0x370 other info that might help us debug this: context-{5:5} 2 locks held by kworker/1:1/62: #0: ffffff897ef5ec98 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2c/0x50 #1: ffffff880154e238 (&sg_policy->update_lock){....}-{2:2}, at: sugov_update_shared+0x3c/0x280 stack backtrace: CPU: 1 UID: 0 PID: 62 Comm: kworker/1:1 Not tainted 6.12.0-rc2-g9654bd3e8806 #406 Workqueue: 0x0 (events) Call trace: dump_backtrace+0xa4/0x130 show_stack+0x20/0x38 dump_stack_lvl+0x90/0xd0 dump_stack+0x18/0x28 __lock_acquire+0x480/0x1ad8 lock_acquire+0x114/0x310 _raw_spin_lock+0x50/0x70 cpc_write+0xcc/0x370 cppc_set_perf+0xa0/0x3a8 cppc_cpufreq_fast_switch+0x40/0xc0 cpufreq_driver_fast_switch+0x4c/0x218 sugov_update_shared+0x234/0x280 update_load_avg+0x6ec/0x7b8 dequeue_entities+0x108/0x830 dequeue_task_fair+0x58/0x408 __schedule+0x4f0/0x1070 schedule+0x54/0x130 worker_thread+0xc0/0x2e8 kthread+0x130/0x148 ret_from_fork+0x10/0x20
sugov_update_shared() locks a raw_spinlock while cpc_write() locks a spinlock.
To have a correct wait-type order, update rmw_lock to a raw spinlock and ensure that interrupts will be disabled on the CPU holding it.
[ rjw: Changelog edits ]
References
- https://linux.oracle.com/cve/CVE-2024-50249.html
- https://linux.oracle.com/errata/ELSA-2024-12887.html
- https://git.kernel.org/stable/c/0eb2b767c42fac61ab23c4063eb456baa4c2c262
- https://git.kernel.org/stable/c/1c10941e34c5fdc0357e46a25bd130d9cf40b925
- https://git.kernel.org/stable/c/23039b4aaf1e82e0feea1060834d4ec34262e453
- https://git.kernel.org/stable/c/43b1df48d1e7000a214acd1a81b8012ca8a929c8
- https://git.kernel.org/stable/c/c46d6b02588000c27b7b869388c2c0278bd0d173