CVE-2022-49625: sfc: fix kernel panic when creating VF
Vulnerability summary
CVE-2022-49625 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.29% chance of exploitation in the next 30 days, higher than 21.3% of scored vulnerabilities.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 7 · Related 5Timeline
- 26-02-2025PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
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 metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.29%
Chance of exploitation in the next 30 days
Percentile
21%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.29% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu111 products
- linuxAll versions (No fix recorded) | < 4.15.0-194.205 | < 5.4.0-128.144 | < 5.15.0-50.56
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 4.15.0-1142.154 | < 5.4.0-1086.93 | < 5.15.0-1021.25
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ d778819609a27efd5358da8151a0ad3507243e19, < d9840212a9c00507347c703f4fdeda16400407e0 | ≥ d778819609a27efd5358da8151a0ad3507243e19, < b9072305270579a9d6afc9b926166231e5b1a7c8 | ≥ d778819609a27efd5358da8151a0ad3507243e19, < 82bcb730f856086f033e6c04082eb4503d4c2fa4 | ≥ d778819609a27efd5358da8151a0ad3507243e19, < da346adcf5573fd8663cabfdfe8371009629a906 | ≥ d778819609a27efd5358da8151a0ad3507243e19, < b82e4ad58a7fb72456503958a93060f87896e629 | ≥ d778819609a27efd5358da8151a0ad3507243e19, < 68e5f32f0de9594629ff9e599294d9801c6187de | ≥ d778819609a27efd5358da8151a0ad3507243e19, < 16662524ec5da801fb78a1afcaf6e782f1cf103a | ≥ d778819609a27efd5358da8151a0ad3507243e19, < ada74c5539eba06cf8b47d068f92e0b3963a9a6e | 4.2
- linux_kernel≥ 4.2, < 4.9.324 | ≥ 4.10, < 4.14.289 | ≥ 4.15, < 4.19.253 | ≥ 4.20, < 5.4.207 | ≥ 5.5, < 5.10.132 | ≥ 5.11, < 5.15.56 | ≥ 5.16, < 5.18.13 | 5.19:rc1 | 5.19:rc2 | 5.19:rc3 | 5.19:rc4 | 5.19:rc5 | 5.19:rc6
Debian1 product
- linux< 5.18.14-1
3 vendors · 114 products
