- 9.8CriticalCVSS base score
- 0.51%Exploitation in 30 daysEPSS · top 56% 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: net/ipv6: ioam6: prevent schema length wraparound in trace fill ioam6_fill_trace_data() stores the schema contribution to the trace length in a u8. With bit 22 enabled and the largest schema payload, sclen becomes 1 + 1020 / 4, wraps from 256 to 0, and bypasses the remaining-space check. __ioam6_fill_trace_data() then positions the write cursor without reserving the schema area but still copies the 4-byte schema header and the full schema payload, overrunning the trace buffer. Keep sclen in an unsigned int so the remaining-space check and the write cursor calculation both see the full schema length.
Timeline
ID reserved
By Linux
- 7 days later
· 7 days later
Published
- 5 months later
· 5 months 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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | Critical9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.51% · top 56% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.8.
Affected products
- affected 8c6f6fa6772696be0c047a711858084b38763728 – < d3a1fb2ca323d7a4e10ab3afbfa25e6d8921e4f2
- affected 8c6f6fa6772696be0c047a711858084b38763728 – < e96d48b37708d53cbdc47f6f60b0714fc4a5f596
- affected 8c6f6fa6772696be0c047a711858084b38763728 – < d1b041080086e91d3733a5438a8c51ad5d3d8e09
- affected 8c6f6fa6772696be0c047a711858084b38763728 – < 77695a69baca9b99d95fad09fc78c2318736604f
- affected 8c6f6fa6772696be0c047a711858084b38763728 – < 184d2e9db27c0f76226b5cad16fe29510a5d2280
- affected 8c6f6fa6772696be0c047a711858084b38763728 – < d6e1c9b02d85a4f1f4ba6d68e916d9b610a3ed7d
- affected 8c6f6fa6772696be0c047a711858084b38763728 – < 5e67ba9bb531e1ec6599a82a065dea9040b9ce50
- affected 5.15
- unaffected < 5.15
- unaffected 5.15.210 – ≤ 5.15.*
- unaffected 6.1.168 – ≤ 6.1.*
- unaffected 6.6.134 – ≤ 6.6.*
- unaffected 6.12.81 – ≤ 6.12.*
- unaffected 6.18.22 – ≤ 6.18.*
- unaffected 6.19.12 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References7
- https://git.kernel.org/stable/c/d3a1fb2ca323d7a4e10ab3afbfa25e6d8921e4f2 (opens in a new tab)
- https://git.kernel.org/stable/c/e96d48b37708d53cbdc47f6f60b0714fc4a5f596 (opens in a new tab)
- https://git.kernel.org/stable/c/d1b041080086e91d3733a5438a8c51ad5d3d8e09 (opens in a new tab)
- https://git.kernel.org/stable/c/77695a69baca9b99d95fad09fc78c2318736604f (opens in a new tab)
- https://git.kernel.org/stable/c/184d2e9db27c0f76226b5cad16fe29510a5d2280 (opens in a new tab)
- https://git.kernel.org/stable/c/d6e1c9b02d85a4f1f4ba6d68e916d9b610a3ed7d (opens in a new tab)
- https://git.kernel.org/stable/c/5e67ba9bb531e1ec6599a82a065dea9040b9ce50 (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-2026-28625 (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-2026-43341)Record last updated .