CVE-2026-31695

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-01. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

In the Linux kernel, the following vulnerability has been resolved:

wifi: virt_wifi: remove SET_NETDEV_DEV to avoid use-after-free

Currently we execute SET_NETDEV_DEV(dev, &priv->lowerdev->dev) for the virt_wifi net devices. However, unregistering a virt_wifi device in netdev_run_todo() can happen together with the device referenced by SET_NETDEV_DEV().

It can result in use-after-free during the ethtool operations performed on a virt_wifi device that is currently being unregistered. Such a net device can have the dev.parent field pointing to the freed memory, but ethnl_ops_begin() calls pm_runtime_get_sync(dev->dev.parent).

Let's remove SET_NETDEV_DEV for virt_wifi to avoid bugs like this:

================================================================== BUG: KASAN: slab-use-after-free in __pm_runtime_resume+0xe2/0xf0 Read of size 2 at addr ffff88810cfc46f8 by task pm/606

Call Trace: dump_stack_lvl+0x4d/0x70 print_report+0x170/0x4f3 ? __pfx__raw_spin_lock_irqsave+0x10/0x10 kasan_report+0xda/0x110 ? __pm_runtime_resume+0xe2/0xf0 ? __pm_runtime_resume+0xe2/0xf0 __pm_runtime_resume+0xe2/0xf0 ethnl_ops_begin+0x49/0x270 ethnl_set_features+0x23c/0xab0 ? __pfx_ethnl_set_features+0x10/0x10 ? kvm_sched_clock_read+0x11/0x20 ? local_clock_noinstr+0xf/0xf0 ? local_clock+0x10/0x30 ? kasan_save_track+0x25/0x60 ? __kasan_kmalloc+0x7f/0x90 ? genl_family_rcv_msg_attrs_parse.isra.0+0x150/0x2c0 genl_family_rcv_msg_doit+0x1e7/0x2c0 ? __pfx_genl_family_rcv_msg_doit+0x10/0x10 ? __pfx_cred_has_capability.isra.0+0x10/0x10 ? stack_trace_save+0x8e/0xc0 genl_rcv_msg+0x411/0x660 ? __pfx_genl_rcv_msg+0x10/0x10 ? __pfx_ethnl_set_features+0x10/0x10 netlink_rcv_skb+0x121/0x380 ? __pfx_genl_rcv_msg+0x10/0x10 ? __pfx_netlink_rcv_skb+0x10/0x10 ? __pfx_down_read+0x10/0x10 genl_rcv+0x23/0x30 netlink_unicast+0x60f/0x830 ? __pfx_netlink_unicast+0x10/0x10 ? __pfx___alloc_skb+0x10/0x10 netlink_sendmsg+0x6ea/0xbc0 ? __pfx_netlink_sendmsg+0x10/0x10 ? __futex_queue+0x10b/0x1f0 ____sys_sendmsg+0x7a2/0x950 ? copy_msghdr_from_user+0x26b/0x430 ? __pfx_____sys_sendmsg+0x10/0x10 ? __pfx_copy_msghdr_from_user+0x10/0x10 ___sys_sendmsg+0xf8/0x180 ? __pfx____sys_sendmsg+0x10/0x10 ? __pfx_futex_wait+0x10/0x10 ? fdget+0x2e4/0x4a0 __sys_sendmsg+0x11f/0x1c0 ? __pfx___sys_sendmsg+0x10/0x10 do_syscall_64+0xe2/0x570 ? exc_page_fault+0x66/0xb0 entry_SYSCALL_64_after_hwframe+0x77/0x7f

This fix may be combined with another one in the ethtool subsystem: https://lore.kernel.org/all/[email protected]/T/#u

CVSS v3
7.8
EG Score
7.8(medium)
EPSS
2.6%
KEV
Not listed

Published

May 1, 2026

Last Modified

May 6, 2026

Advisory Details (7)

Auto-updated May 3, 2026
No patch confirmed yet.
generic

wifi: virt_wifi: remove SET_NETDEV_DEV to avoid use-after-free - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e90f3e74e1ebc26c461a74be490d322716bcdcb4
generic

wifi: virt_wifi: remove SET_NETDEV_DEV to avoid use-after-free - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/dcb5915696bd7b32b6404a897c24ee47cb23e772
generic

wifi: virt_wifi: remove SET_NETDEV_DEV to avoid use-after-free - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d1e3aa80e6e04410ba89eaaba4441a0d749d181d
generic

wifi: virt_wifi: remove SET_NETDEV_DEV to avoid use-after-free - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c5fa98842783ed227365d1303785de6a67020c8d
generic

wifi: virt_wifi: remove SET_NETDEV_DEV to avoid use-after-free - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/789b06f9f39cdc7e895bdab2c034e39c41c8f8d6
generic

wifi: virt_wifi: remove SET_NETDEV_DEV to avoid use-after-free - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5bbadf60b121065ffb267ec92018607b9c1c7524
generic

wifi: virt_wifi: remove SET_NETDEV_DEV to avoid use-after-free - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5adc01506da94dfaab76f3d1b8410a8ca7bfc59d

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 12× in last 7d / 41× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 122 total refreshes for this CVE.

  1. 2026-07-18 10:04 UTCEPSS rescore
  2. 2026-07-18 10:04 UTCEPSS rescore
  3. 2026-07-16 17:03 UTCEPSS rescore
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  14. 2026-07-09 19:10 UTCEPSS rescore
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  16. 2026-07-07 13:46 UTCEPSS rescore
  17. 2026-07-06 16:27 UTCEPSS rescore
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  21. 2026-07-05 02:30 UTCEPSS rescore
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  23. 2026-07-01 15:06 UTCEPSS rescore
  24. 2026-06-30 23:22 UTCEPSS rescore
  25. 2026-06-29 14:06 UTCEPSS rescore
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  1. 2026-06-29 14:06 UTCEPSS rescore
  2. 2026-06-28 14:07 UTCEPSS rescore
  3. 2026-06-28 14:07 UTCEPSS rescore
  4. 2026-06-28 04:56 UTCEPSS rescore
  5. 2026-06-28 04:56 UTCEPSS rescore
  6. 2026-06-27 03:08 UTCEPSS rescore
  7. 2026-06-25 13:49 UTCEPSS rescore
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  9. 2026-06-24 14:05 UTCEPSS rescore
  10. 2026-06-23 21:33 UTCEPSS rescore
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  12. 2026-06-21 14:56 UTCEPSS rescore
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  20. 2026-06-16 17:52 UTCEPSS rescore
  21. 2026-06-15 17:49 UTCEPSS rescore
  22. 2026-06-14 23:18 UTCEPSS rescore
  23. 2026-06-14 20:56 UTCGHSA enrichment
  24. 2026-06-14 09:12 UTCGHSA enrichment
  25. 2026-06-13 23:00 UTCEPSS rescore
  26. 2026-06-12 23:12 UTCEPSS rescore
  27. 2026-06-12 23:12 UTCEPSS rescore
  28. 2026-06-12 11:01 UTCGHSA enrichment
  29. 2026-06-11 23:13 UTCGHSA enrichment
  30. 2026-06-11 14:00 UTCEPSS rescore
  31. 2026-06-11 11:29 UTCGHSA enrichment
  32. 2026-06-10 22:55 UTCGHSA enrichment
  33. 2026-06-10 22:18 UTCEPSS rescore
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  35. 2026-06-10 11:10 UTCGHSA enrichment
  36. 2026-06-09 23:26 UTCGHSA enrichment
  37. 2026-06-09 11:15 UTCGHSA enrichment
  38. 2026-06-08 23:31 UTCGHSA enrichment
  39. 2026-06-08 14:17 UTCEPSS rescore
  40. 2026-06-08 14:17 UTCEPSS rescore
  41. 2026-06-08 07:40 UTCGHSA enrichment
  42. 2026-06-07 19:56 UTCGHSA enrichment
  43. 2026-06-07 15:25 UTCEPSS rescore
  44. 2026-06-07 15:25 UTCEPSS rescore
  45. 2026-06-07 15:25 UTCEPSS rescore
  46. 2026-06-07 08:12 UTCGHSA enrichment
  47. 2026-06-06 20:28 UTCGHSA enrichment
  48. 2026-06-06 13:47 UTCEPSS rescore
  49. 2026-06-06 13:47 UTCEPSS rescore
  50. 2026-06-06 08:44 UTCGHSA enrichment
  51. 2026-06-05 22:47 UTCEPSS rescore
  52. 2026-06-05 22:47 UTCEPSS rescore
  53. 2026-06-05 21:00 UTCGHSA enrichment
  54. 2026-06-05 09:16 UTCGHSA enrichment
  55. 2026-06-04 21:32 UTCGHSA enrichment
  56. 2026-06-04 13:12 UTCEPSS rescore
  57. 2026-06-04 13:12 UTCEPSS rescore
  58. 2026-06-04 09:46 UTCGHSA enrichment
  59. 2026-06-03 22:02 UTCGHSA enrichment
  60. 2026-06-03 10:04 UTCGHSA enrichment
  61. 2026-06-02 21:48 UTCGHSA enrichment
  62. 2026-06-02 20:13 UTCEPSS rescore
  63. 2026-06-02 20:13 UTCEPSS rescore
  64. 2026-06-02 10:01 UTCGHSA enrichment
  65. 2026-06-01 22:14 UTCGHSA enrichment
  66. 2026-06-01 13:51 UTCEPSS rescore
  67. 2026-06-01 13:51 UTCEPSS rescore
  68. 2026-06-01 10:29 UTCGHSA enrichment
  69. 2026-05-31 22:30 UTCEPSS rescore
  70. 2026-05-31 22:30 UTCEPSS rescore
  71. 2026-05-31 00:16 UTCEPSS rescore
  72. 2026-05-31 00:16 UTCEPSS rescore
  73. 2026-05-29 13:44 UTCEPSS rescore
  74. 2026-05-29 13:44 UTCEPSS rescore
  75. 2026-05-28 13:44 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2026-31695?
CVE-2026-31695 is a high vulnerability published on May 1, 2026. In the Linux kernel, the following vulnerability has been resolved: wifi: virtwifi: remove SETNETDEV_DEV to avoid use-after-free Currently we execute SETNETDEVDEV(dev, &priv->lowerdev->dev) for the virtwifi net devices. However, unregistering a virtwifi device in netdevruntodo() can happen together…
When was CVE-2026-31695 disclosed?
CVE-2026-31695 was first published in the National Vulnerability Database on May 1, 2026, with the most recent update on May 6, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-31695 actively exploited?
CVE-2026-31695 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-31695?
CVE-2026-31695 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-31695?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31695, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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