sfc: fix kernel panic when creating VF
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...
- Published
- Feb 26, 2025
- Updated
- Jun 17, 2026
- EPSS
- 0.3% · 19th percentile
- CWE
- CWE-476
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Report tools
Action score
22
Monitor
Low priority for now.
- CVSS
- 22 / 40 · 5.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.3%
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| linux | linux kernel | cpe:2.3:o:linux:linux_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.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 5.18.14-1 | 5.18.14-1 |
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- 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 KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
- CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV83Now
- CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV77This week
- CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV77This week
- CVE-2013-2094The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows loKEV77This week
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 16662524ec5da801fb78a1afcaf6e782f1cf103a | Vendor (CNA) |
| Linux Linux | 68e5f32f0de9594629ff9e599294d9801c6187de | Vendor (CNA) |
| Linux Linux | 82bcb730f856086f033e6c04082eb4503d4c2fa4 | Vendor (CNA) |
| Linux Linux | ada74c5539eba06cf8b47d068f92e0b3963a9a6e | Vendor (CNA) |
| Linux Linux | b82e4ad58a7fb72456503958a93060f87896e629 | Vendor (CNA) |
| Linux Linux | b9072305270579a9d6afc9b926166231e5b1a7c8 | Vendor (CNA) |
| Linux Linux | d9840212a9c00507347c703f4fdeda16400407e0 | Vendor (CNA) |
| Linux Linux | da346adcf5573fd8663cabfdfe8371009629a906 | Vendor (CNA) |
| debian:linux | 5.18.14-1 · Debian:12 | Package 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.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
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 researchersFinders, 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 DereferenceCVSS 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.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/stable/c/16662524ec5da801fb78a1afcaf6e782f1cf103a
- git.kernel.org/stable/c/68e5f32f0de9594629ff9e599294d9801c6187de
- git.kernel.org/stable/c/82bcb730f856086f033e6c04082eb4503d4c2fa4
- git.kernel.org/stable/c/ada74c5539eba06cf8b47d068f92e0b3963a9a6e
- git.kernel.org/stable/c/b82e4ad58a7fb72456503958a93060f87896e629
- git.kernel.org/stable/c/b9072305270579a9d6afc9b926166231e5b1a7c8
- git.kernel.org/stable/c/d9840212a9c00507347c703f4fdeda16400407e0
- git.kernel.org/stable/c/da346adcf5573fd8663cabfdfe8371009629a906
Vendor advisories and official records. Exploit/PoC links are deliberately left out.