CVE-2025-37859 Affecting kernel-source-azure package, versions <6.4.0-150600.8.43.1
Threat Intelligence
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Test your applications- Snyk IDSNYK-SLES156-KERNELSOURCEAZURE-10665295
- published9 Jul 2025
- disclosed8 Jul 2025
Introduced: 8 Jul 2025
NewCVE-2025-37859 (opens in a new tab)How to fix?
Upgrade SLES:15.6 kernel-source-azure to version 6.4.0-150600.8.43.1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-source-azure package and not the kernel-source-azure package as distributed by SLES.
See How to fix? for SLES:15.6 relevant fixed versions and status.
In the Linux kernel, the following vulnerability has been resolved:
page_pool: avoid infinite loop to schedule delayed worker
We noticed the kworker in page_pool_release_retry() was waken up repeatedly and infinitely in production because of the buggy driver causing the inflight less than 0 and warning us in page_pool_inflight()[1].
Since the inflight value goes negative, it means we should not expect the whole page_pool to get back to work normally.
This patch mitigates the adverse effect by not rescheduling the kworker when detecting the inflight negative in page_pool_release_retry().
[1] [Mon Feb 10 20:36:11 2025] ------------[ cut here ]------------ [Mon Feb 10 20:36:11 2025] Negative(-51446) inflight packet-pages ... [Mon Feb 10 20:36:11 2025] Call Trace: [Mon Feb 10 20:36:11 2025] page_pool_release_retry+0x23/0x70 [Mon Feb 10 20:36:11 2025] process_one_work+0x1b1/0x370 [Mon Feb 10 20:36:11 2025] worker_thread+0x37/0x3a0 [Mon Feb 10 20:36:11 2025] kthread+0x11a/0x140 [Mon Feb 10 20:36:11 2025] ? process_one_work+0x370/0x370 [Mon Feb 10 20:36:11 2025] ? __kthread_cancel_work+0x40/0x40 [Mon Feb 10 20:36:11 2025] ret_from_fork+0x35/0x40 [Mon Feb 10 20:36:11 2025] ---[ end trace ebffe800f33e7e34 ]--- Note: before this patch, the above calltrace would flood the dmesg due to repeated reschedule of release_dw kworker.
References
- https://www.suse.com/security/cve/CVE-2025-37859.html
- https://bugzilla.suse.com/1243051
- https://git.kernel.org/stable/c/43130d02baa137033c25297aaae95fd0edc41654
- https://git.kernel.org/stable/c/7204335d1991c23fc615ab76f31f175748a578e1
- https://git.kernel.org/stable/c/738d1812ec2e395e953258aea912ddd867d11a13
- https://git.kernel.org/stable/c/90e089a64504982f8d62f223027cb9f903781f78
- https://git.kernel.org/stable/c/91522aba56e9fcdf64da25ffef9b27f8fad48e0f
- https://git.kernel.org/stable/c/95f17738b86fd198924d874a5639bcdc49c7e5b8
- https://git.kernel.org/stable/c/9f71db4fb82deb889e0bac4a51b34daea7d506a3
- https://git.kernel.org/stable/c/c3c7c57017ce1d4b2d3788c1fc59e7e39026e158
- https://git.kernel.org/stable/c/e74e5aa33228c5e2cb4fc80ad103541a7b7805ec