- —Not scoredno CVSS score yet
- 0.21%Exploitation in 30 daysEPSS · top 89% 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: vxlan: use one headroom snapshot for neighbour replies vxlan_na_create() samples LL_RESERVED_SPACE() to size the reply skb and then samples it again to reserve headroom. A concurrent vxlan_changelink() can update needed_headroom between the two reads, creating a TOCTOU race. The second value can exceed the allocation and make the Ethernet header write out of bounds. The race is reproducible on the unpatched kernel. It occurred when vxlan_na_create() generated a neighbour reply while vxlan_changelink() changed the link headroom. KASAN caught a four-byte write two bytes beyond a 704-byte skbuff_small_head allocation. Snapshot the headroom once and use that value for both allocation and reservation.
Timeline
ID reserved
By Linux
- 23 days later
· 23 days later
Published
- 12 days later
· 12 days 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)
- 0.21% · top 89% 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 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa – < e3e24f4c434c56952412f875b834aa9daaa4fb15
- affected 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa – < 9ed5a548b42d46e6968a46b67ca8a8e49b12a5a1
- affected 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa – < fcaf456092dc86fd5b0b523ac27ec0d114066931
- affected 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa – < 45a67662bf8ce3aa5643accf98d328dfbb47eaf6
- affected 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa – < 315d42ca39f69846662961c25dcf2bb07c350d14
- affected 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa – < a3c5eb6e382dd426a5e7eb08608897ed57167ff7
- affected 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa – < ff022fd9d0f0282c575e11778b96bd1b637503eb
- affected 4b29dba9c085a4fb79058fb1c45a2f6257ca3dfa – < 481506a756dcd828ef42391cb08f38d8d96d38fc
- affected d8be18c52dbc94989f6d74637b731af39cd3d902
- affected 3927dace523706cc00f808520eaf2125dd7c07b5
- affected 3.12.18 – < 3.13
- affected 3.13.10 – < 3.14
- affected 3.14
- unaffected < 3.14
- unaffected 5.10.273 – ≤ 5.10.*
- unaffected 5.15.224 – ≤ 5.15.*
- unaffected 6.1.191 – ≤ 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/e3e24f4c434c56952412f875b834aa9daaa4fb15 (opens in a new tab)
- https://git.kernel.org/stable/c/9ed5a548b42d46e6968a46b67ca8a8e49b12a5a1 (opens in a new tab)
- https://git.kernel.org/stable/c/fcaf456092dc86fd5b0b523ac27ec0d114066931 (opens in a new tab)
- https://git.kernel.org/stable/c/45a67662bf8ce3aa5643accf98d328dfbb47eaf6 (opens in a new tab)
- https://git.kernel.org/stable/c/315d42ca39f69846662961c25dcf2bb07c350d14 (opens in a new tab)
- https://git.kernel.org/stable/c/a3c5eb6e382dd426a5e7eb08608897ed57167ff7 (opens in a new tab)
- https://git.kernel.org/stable/c/ff022fd9d0f0282c575e11778b96bd1b637503eb (opens in a new tab)
- https://git.kernel.org/stable/c/481506a756dcd828ef42391cb08f38d8d96d38fc (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-2026-103613 (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-2026-98568)Record last updated .