CVE-2022-49625

MEDIUM EPSS 17.7%
Published Feb 26, 20251y ago · Modified Jun 17, 20261w ago
5.5 CVSS 3.1
Medium
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Published Feb 26, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

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...

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
17.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 13

VendorProductVersionRange
linuxlinux_kernel*≥4.2  –  <4.9.324
linuxlinux_kernel*≥4.10  –  <4.14.289
linuxlinux_kernel*≥4.15  –  <4.19.253
linuxlinux_kernel*≥4.20  –  <5.4.207
linuxlinux_kernel*≥5.5  –  <5.10.132
linuxlinux_kernel*≥5.11  –  <5.15.56
linuxlinux_kernel*≥5.16  –  <5.18.13
linuxlinux_kernel5.19any
linuxlinux_kernel5.19any
linuxlinux_kernel5.19any
linuxlinux_kernel5.19any
linuxlinux_kernel5.19any
linuxlinux_kernel5.19any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/16662524ec5da801fb78a1afcaf6e782f1cf103a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/68e5f32f0de9594629ff9e599294d9801c6187de
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/82bcb730f856086f033e6c04082eb4503d4c2fa4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ada74c5539eba06cf8b47d068f92e0b3963a9a6e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b82e4ad58a7fb72456503958a93060f87896e629
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b9072305270579a9d6afc9b926166231e5b1a7c8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d9840212a9c00507347c703f4fdeda16400407e0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/da346adcf5573fd8663cabfdfe8371009629a906
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/16662524ec5da801fb78a1afcaf6e782f1cf103a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/68e5f32f0de9594629ff9e599294d9801c6187de
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/82bcb730f856086f033e6c04082eb4503d4c2fa4
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/ada74c5539eba06cf8b47d068f92e0b3963a9a6e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b82e4ad58a7fb72456503958a93060f87896e629
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b9072305270579a9d6afc9b926166231e5b1a7c8
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d9840212a9c00507347c703f4fdeda16400407e0
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/da346adcf5573fd8663cabfdfe8371009629a906
    Patch