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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2022-49625 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: sfc: fix kernel panic when creating VF When creating VFs a kernel panic can happen when calling to efx_ef10_try_update_nic_stats_vf. When releasing a DMA coherent buffer, sometimes, I don't know in what specific circumstances, it has to unmap memory with vunmap. It is disallowed to do that in IRQ context or with BH disabled. Otherwise, we hit this line in vunmap, causing the crash: BUG_ON(in_interrupt()); This patch reenables BH to release the buffer. Log messages when the bug is hit: kernel BUG at mm/vmalloc.c:2727! invalid opcode: 0000 [#1] PREEMPT SMP NOPTI CPU: 6 PID: 1462 Comm: NetworkManager Kdump: loaded Tainted: G I --------- --- 5.14.0-119.el9.x86_64 #1 Hardware name: Dell Inc. PowerEdge R740/06WXJT, BIOS 2.8.2 08/27/2020 RIP: 0010:vunmap+0x2e/0x30 ...skip... Call Trace: __iommu_dma_free+0x96/0x100 efx_nic_free_buffer+0x2b/0x40 [sfc] efx_ef10_try_update_nic_stats_vf+0x14a/0x1c0 [sfc] efx_ef10_update_stats_vf+0x18/0x40 [sfc] efx_start_all+0x15e/0x1d0 [sfc] efx_net_open+0x5a/0xe0 [sfc] __dev_open+0xe7/0x1a0 __dev_change_flags+0x1d7/0x240 dev_change_flags+0x21/0x60 ...skip...


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/16662524ec5da801fb78a1afcaf6e782f1cf103a kernel.org Patch 
https://git.kernel.org/stable/c/68e5f32f0de9594629ff9e599294d9801c6187de kernel.org Patch 
https://git.kernel.org/stable/c/82bcb730f856086f033e6c04082eb4503d4c2fa4 kernel.org Patch 
https://git.kernel.org/stable/c/ada74c5539eba06cf8b47d068f92e0b3963a9a6e kernel.org Patch 
https://git.kernel.org/stable/c/b82e4ad58a7fb72456503958a93060f87896e629 kernel.org Patch 
https://git.kernel.org/stable/c/b9072305270579a9d6afc9b926166231e5b1a7c8 kernel.org Patch 
https://git.kernel.org/stable/c/d9840212a9c00507347c703f4fdeda16400407e0 kernel.org Patch 
https://git.kernel.org/stable/c/da346adcf5573fd8663cabfdfe8371009629a906 kernel.org Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-476 NULL Pointer Dereference cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

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Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2022-49625
NVD Published Date:
02/26/2025
NVD Last Modified:
10/23/2025
Source:
kernel.org