VulnerabilityPublished 9 Sep 2026Updated 30 Oct 2026

CVE-2026-80925: Linux kernel · vlan: fix skb_under_panic and races when toggling HW VLAN offload

Source GCVE Database

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Authoritative record:CVE-2026-80925· High

Not known to be exploited · fixed in b38d7a4bc9c17e1d437696da25f9fbc286614d9d : patch Linux kernel soon.

Data as of 30 Oct 2026, 19:33 UTC

Severity

High

Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD

Thin evidence

One scorer or none

Patch: Available – fixed in b38d7a4bc9c17e1d437696da25f9fbc286614d9d, b30fe4de285b9bdaf9508740191f69f7cd83b8fa, a29f3b884ba50217e6f50414f568073221e2bb07 +3

Exploitation evidence

Disclosed: evidence found.
CVE published 9 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-rp2g-gfw2-xg88

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < b38d7a4bc9c17e1d437696da25f9fbc286614d9d	Fixed in b38d7a4bc9c17e1d437696da25f9fbc286614d9d
LinuxLinux	Affected ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < b30fe4de285b9bdaf9508740191f69f7cd83b8fa	Fixed in b30fe4de285b9bdaf9508740191f69f7cd83b8fa
LinuxLinux	Affected ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < a29f3b884ba50217e6f50414f568073221e2bb07	Fixed in a29f3b884ba50217e6f50414f568073221e2bb07
LinuxLinux	Affected ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 1517d1996b5236fe69eccd9d253f725e06996eb1	Fixed in 1517d1996b5236fe69eccd9d253f725e06996eb1
LinuxLinux	Affected ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 447cbe95ebb95392b5d8f6a01c0556826919ce23	Fixed in 447cbe95ebb95392b5d8f6a01c0556826919ce23
LinuxLinux	Affected ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 69f2fc6e761ee68a4c0c8e416ae88c573d4d7319	Fixed in 69f2fc6e761ee68a4c0c8e416ae88c573d4d7319

AI-suggested

A fix has been implemented in the Linux kernel that makes VLAN device header length and needed headroom static and consistent with the underlying device, eliminating data races and buffer misallocation. Users should apply the relevant kernel patches that include commits e16e960d55a4 and cef51860becd or later stable releases containing these fixes. No additional mitigation is required beyond updating to a patched kernel version.

Description

A vulnerability in the Linux kernel VLAN implementation caused data races and incorrect buffer headroom allocation when toggling hardware VLAN TX offload features. This could lead to kernel panics (skb_under_panic) due to insufficient reserved headroom for packet headers. The issue was fixed by making the VLAN device's hard_header_len and needed_headroom static and consistent with the underlying device, eliminating dynamic updates and race conditions.

References

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