CVE-2022-49625sfc: fix kernel panic when creating VF
- 5.5MediumCVSS base score
- 0.29%Exploitation in 30 daysEPSS · top 78% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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...
Timeline
ID reserved
By Linux
Published
- 15 months later
· 15 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.29% · top 78% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected d778819609a27efd5358da8151a0ad3507243e19 – < d9840212a9c00507347c703f4fdeda16400407e0
- affected d778819609a27efd5358da8151a0ad3507243e19 – < b9072305270579a9d6afc9b926166231e5b1a7c8
- affected d778819609a27efd5358da8151a0ad3507243e19 – < 82bcb730f856086f033e6c04082eb4503d4c2fa4
- affected d778819609a27efd5358da8151a0ad3507243e19 – < da346adcf5573fd8663cabfdfe8371009629a906
- affected d778819609a27efd5358da8151a0ad3507243e19 – < b82e4ad58a7fb72456503958a93060f87896e629
- affected d778819609a27efd5358da8151a0ad3507243e19 – < 68e5f32f0de9594629ff9e599294d9801c6187de
- affected d778819609a27efd5358da8151a0ad3507243e19 – < 16662524ec5da801fb78a1afcaf6e782f1cf103a
- affected d778819609a27efd5358da8151a0ad3507243e19 – < ada74c5539eba06cf8b47d068f92e0b3963a9a6e
- affected 4.2
- unaffected < 4.2
- unaffected 4.9.324 – ≤ 4.9.*
- unaffected 4.14.289 – ≤ 4.14.*
- unaffected 4.19.253 – ≤ 4.19.*
- unaffected 5.4.207 – ≤ 5.4.*
- unaffected 5.10.132 – ≤ 5.10.*
- unaffected 5.15.56 – ≤ 5.15.*
- unaffected 5.18.13 – ≤ 5.18.*
- unaffected 5.19 – ≤ *
References
References8
- https://git.kernel.org/stable/c/d9840212a9c00507347c703f4fdeda16400407e0 (opens in a new tab)
- https://git.kernel.org/stable/c/b9072305270579a9d6afc9b926166231e5b1a7c8 (opens in a new tab)
- https://git.kernel.org/stable/c/82bcb730f856086f033e6c04082eb4503d4c2fa4 (opens in a new tab)
- https://git.kernel.org/stable/c/da346adcf5573fd8663cabfdfe8371009629a906 (opens in a new tab)
- https://git.kernel.org/stable/c/b82e4ad58a7fb72456503958a93060f87896e629 (opens in a new tab)
- https://git.kernel.org/stable/c/68e5f32f0de9594629ff9e599294d9801c6187de (opens in a new tab)
- https://git.kernel.org/stable/c/16662524ec5da801fb78a1afcaf6e782f1cf103a (opens in a new tab)
- https://git.kernel.org/stable/c/ada74c5539eba06cf8b47d068f92e0b3963a9a6e (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2022-54607 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2022-49625)Record last updated .