Bug 2355446 (CVE-2023-53025)

Summary: CVE-2023-53025 kernel: NFSD: fix use-after-free in nfsd4_ssc_setup_dul()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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An expired pointer dereference flaw was found in the NFSv4 implementation in the Linux kernel, which may negatively affect system availability when the kernel thread is signaled during a mount/unmount operation. If signal_pending() returns true, schedule_timeout() will not be executed, causing the waiting task to remain in the wait queue, which may lead to a use after free later on. This can impact system stability, leading to memory corruption and possibly arbitrary code execution.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2025-03-27 17:01:54 UTC 
In the Linux kernel, the following vulnerability has been resolved:

NFSD: fix use-after-free in nfsd4_ssc_setup_dul()

If signal_pending() returns true, schedule_timeout() will not be executed,
causing the waiting task to remain in the wait queue.
Fixed by adding a call to finish_wait(), which ensures that the waiting
task will always be removed from the wait queue.
Comment 1 Robb Gatica 2025-03-28 00:59:07 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025032719-CVE-2023-53025-5662@gregkh/T