- —Not scoredno CVSS score yet
- 0.22%Exploitation in 30 daysEPSS · top 88% 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: vlan: ensure sufficient headroom in vlan_dev_hard_header() Callers that only reserve ETH_HLEN or less (such as llc_alloc_frame()), or skbs allocated before dynamic device/headroom changes (e.g. toggling VLAN_FLAG_REORDER_HDR or bonding/team switching slaves), can reach vlan_dev_hard_header() with insufficient headroom and trigger skb_under_panic(). Use skb_cow_head() in vlan_dev_hard_header() when VLAN_FLAG_REORDER_HDR is not set to ensure sufficient headroom for the VLAN header(s) and the underlying device hard header. Use READ_ONCE() to read dev->hard_header_len and dev->needed_headroom as they can be updated concurrently under RTNL (e.g. in vlan_transfer_features()) while vlan_dev_hard_header() runs locklessly on the transmit path. Also avoid LL_RESERVED_SPACE(dev) here so that the extra HH_DATA_MOD alignment padding does not trigger unnecessary pskb_expand_head() reallocations on inner stacked VLAN devices after the outer VLAN header has been pushed.
Timeline
ID reserved
By Linux
- 23 days later
· 23 days later
Published
- 1 day later
· 1 day 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
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.22% · top 88% of all CVEs (11 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 55e007fc3b4d76fa4d6b4660f6904fe6ab045a1b
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 5aca8e6a8ff6aeae358c1d9b65447aac416ace95
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 4ba1f57313f36a3ce6f77d593548f0c511f34aa1
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < ca797491f0ae4bfde9039f79f6f1ed7781c9110f
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < cfba0f45553de2b803059e3d539a1e418df24da8
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < c7ee4bea64f559ea8e03260014775b64c720cb5b
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 90d51095371d96747f45bbd8504edf6513e039ef
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < cd5dd68267c4238795fadaf02b3575ca3f8a6500
- affected 2.6.12
- unaffected < 2.6.12
- unaffected 5.10.271 – ≤ 5.10.*
- unaffected 5.15.222 – ≤ 5.15.*
- unaffected 6.1.189 – ≤ 6.1.*
- unaffected 6.6.158 – ≤ 6.6.*
- unaffected 6.12.112 – ≤ 6.12.*
- unaffected 6.18.55 – ≤ 6.18.*
- unaffected 7.2.9 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References8
- https://git.kernel.org/stable/c/55e007fc3b4d76fa4d6b4660f6904fe6ab045a1b (opens in a new tab)
- https://git.kernel.org/stable/c/5aca8e6a8ff6aeae358c1d9b65447aac416ace95 (opens in a new tab)
- https://git.kernel.org/stable/c/4ba1f57313f36a3ce6f77d593548f0c511f34aa1 (opens in a new tab)
- https://git.kernel.org/stable/c/ca797491f0ae4bfde9039f79f6f1ed7781c9110f (opens in a new tab)
- https://git.kernel.org/stable/c/cfba0f45553de2b803059e3d539a1e418df24da8 (opens in a new tab)
- https://git.kernel.org/stable/c/c7ee4bea64f559ea8e03260014775b64c720cb5b (opens in a new tab)
- https://git.kernel.org/stable/c/90d51095371d96747f45bbd8504edf6513e039ef (opens in a new tab)
- https://git.kernel.org/stable/c/cd5dd68267c4238795fadaf02b3575ca3f8a6500 (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-2026-103599 (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-2026-98554)Record last updated .