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NVD / CVE Program· CNA Linux

CVE-2022-49625: sfc: fix kernel panic when creating VF

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.28% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 16662524ec5da801fb78a1afcaf6e782f1cf103a, 68e5f32f0de9594629ff9e599294d9801c6187de, 82bcb730f856086f033e6c04082eb4503d4c2fa4.

Low priority for now. Upgrade to Linux Linux 16662524ec5da801fb78a1afcaf6e782f1cf103a, 68e5f32f0de9594629ff9e599294d9801c6187de, 82bcb730f856086f033e6c04082eb4503d4c2fa4 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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...

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Feb 26, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 21th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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When you'll hear from us

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  • when exploit code appears or is weaponized
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  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel4.2 and later · before 4.9.324
  • linux linux kernel4.10 and later · before 4.14.289
  • linux linux kernel4.15 and later · before 4.19.253
  • linux linux kernel4.20 and later · before 5.4.207
  • linux linux kernel5.5 and later · before 5.10.132
  • linux linux kernel5.11 and later · before 5.15.56
  • linux linux kernel5.16 and later · before 5.18.13
  • linux linux kernel5.19

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 4.2affected
    • d778819609a27efd5358da8151a0ad3507243e19 and later · before d9840212a9c00507347c703f4fdeda16400407e0affected · git
    • d778819609a27efd5358da8151a0ad3507243e19 and later · before b9072305270579a9d6afc9b926166231e5b1a7c8affected · git
    • d778819609a27efd5358da8151a0ad3507243e19 and later · before 82bcb730f856086f033e6c04082eb4503d4c2fa4affected · git
    • d778819609a27efd5358da8151a0ad3507243e19 and later · before da346adcf5573fd8663cabfdfe8371009629a906affected · git
    • d778819609a27efd5358da8151a0ad3507243e19 and later · before b82e4ad58a7fb72456503958a93060f87896e629affected · git
    • d778819609a27efd5358da8151a0ad3507243e19 and later · before 68e5f32f0de9594629ff9e599294d9801c6187deaffected · git
    • d778819609a27efd5358da8151a0ad3507243e19 and later · before 16662524ec5da801fb78a1afcaf6e782f1cf103aaffected · git
    • d778819609a27efd5358da8151a0ad3507243e19 and later · before ada74c5539eba06cf8b47d068f92e0b3963a9a6eaffected · git
    • before 4.2not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.18.14-15.18.14-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2022-49621Feb 26, 2025 · cpufreq: pmac32-cpufreq: Fix refcount leak bug
    22Monitor
  • ← EarlierCVE-2022-49623Feb 26, 2025 · powerpc/xive/spapr: correct bitmap allocation size
    28Monitor
  • Later →CVE-2022-49626Feb 26, 2025 · sfc: fix use after free when disabling sriov
    31Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux16662524ec5da801fb78a1afcaf6e782f1cf103aVendor (CNA)
Linux Linux68e5f32f0de9594629ff9e599294d9801c6187deVendor (CNA)
Linux Linux82bcb730f856086f033e6c04082eb4503d4c2fa4Vendor (CNA)
Linux Linuxada74c5539eba06cf8b47d068f92e0b3963a9a6eVendor (CNA)
Linux Linuxb82e4ad58a7fb72456503958a93060f87896e629Vendor (CNA)
Linux Linuxb9072305270579a9d6afc9b926166231e5b1a7c8Vendor (CNA)
Linux Linuxd9840212a9c00507347c703f4fdeda16400407e0Vendor (CNA)
Linux Linuxda346adcf5573fd8663cabfdfe8371009629a906Vendor (CNA)
debian:linux5.18.14-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records