CVE-2022-49625

Kernel panic via interrupt-context DMA buffer release

Published Feb 26, 2025 · Updated May 11, 2026

Denial of service in the sfc driver in Linux allows local users to trigger a kernel panic while creating a virtual function. The efx_ef10_try_update_nic_stats_vf path releases a DMA-coherent buffer through vunmap while bottom halves remain disabled, violating the interrupt-context restriction and reaching BUG_ON. Exploitation requires local access to create VFs on a supported SR-IOV network device and interrupts availability by crashing the host kernel.

CVSS severity5.5
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in the sfc driver in Linux allows local users to trigger a kernel panic while creating a virtual function. The efx_ef10_try_update_nic_stats_vf path releases a DMA-coherent buffer through vunmap while bottom halves remain disabled, violating the interrupt-context restriction and reaching BUG_ON. Exploitation requires local access to create VFs on a supported SR-IOV network device and interrupts availability by crashing the host kernel.

The record

CVE
CVE-2022-49625
Published
Feb 26, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 26, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4.2
  2. Affected versionversion=d778819609a27efd5358da8151a0ad3507243e19 <16662524ec5da801fb78a1afcaf6e782f1cf103a
  3. Affected versionversion=d778819609a27efd5358da8151a0ad3507243e19 <68e5f32f0de9594629ff9e599294d9801c6187de
  4. Affected versionversion=d778819609a27efd5358da8151a0ad3507243e19 <82bcb730f856086f033e6c04082eb4503d4c2fa4
  5. Affected versionversion=d778819609a27efd5358da8151a0ad3507243e19 <ada74c5539eba06cf8b47d068f92e0b3963a9a6e
  6. Affected versionversion=d778819609a27efd5358da8151a0ad3507243e19 <b82e4ad58a7fb72456503958a93060f87896e629
  7. Affected versionversion=d778819609a27efd5358da8151a0ad3507243e19 <b9072305270579a9d6afc9b926166231e5b1a7c8
  8. Affected versionversion=d778819609a27efd5358da8151a0ad3507243e19 <d9840212a9c00507347c703f4fdeda16400407e0
  9. Affected versionversion=d778819609a27efd5358da8151a0ad3507243e19 <da346adcf5573fd8663cabfdfe8371009629a906

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.2; version=d778819609a27efd5358da8151a0ad3507243e19 <16662524ec5da801fb78a1afcaf6e782f1cf103a; version=d778819609a27efd5358da8151a0ad3507243e19 <68e5f32f0de9594629ff9e599294d9801c6187de; version=d778819609a27efd5358da8151a0ad3507243e19 <82bcb730f856086f033e6c04082eb4503d4c2fa4; version=d778819609a27efd5358da8151a0ad3507243e19 <ada74c5539eba06cf8b47d068f92e0b3963a9a6e; version=d778819609a27efd5358da8151a0ad3507243e19 <b82e4ad58a7fb72456503958a93060f87896e629; version=d778819609a27efd5358da8151a0ad3507243e19 <b9072305270579a9d6afc9b926166231e5b1a7c8; version=d778819609a27efd5358da8151a0ad3507243e19 <d9840212a9c00507347c703f4fdeda16400407e0; version=d778819609a27efd5358da8151a0ad3507243e19 <da346adcf5573fd8663cabfdfe8371009629a906

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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