CVE-2026-53147thunderbolt: Validate XDomain request packet size before type cast
- 8.1HighCVSS base score
- 0.27%Exploitation in 30 daysEPSS · top 81% 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: thunderbolt: Validate XDomain request packet size before type cast tb_xdp_handle_request() casts the received packet buffer to protocol-specific structs without verifying that the allocation is large enough for the target type. A peer can send a minimal XDomain packet that passes the generic header length check but is shorter than the struct accessed after the cast, causing out-of- bounds reads from the kmemdup allocation. Plumb the packet length through xdomain_request_work and validate it against the expected struct size before each cast.
Timeline
ID reserved
By Linux
- 16 days later
· 16 days later
Published
- 4 months later
· 4 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 | High8.1 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
| NVDNVD · Modified | 3.1 | High8.1 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.27% · top 81% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.1.
Affected products
- affected cdae7c07e3e3509eaabc18c1640a55dc5b99c179 – < a770e62923090d7572f1f5a8507ae551d354a057
- affected cdae7c07e3e3509eaabc18c1640a55dc5b99c179 – < 0dd61ba03d05187726ecdf9c0e2175a81b9b24f6
- affected cdae7c07e3e3509eaabc18c1640a55dc5b99c179 – < 79235c8add5da4bf27a12f5a5dbb579f300c059e
- affected cdae7c07e3e3509eaabc18c1640a55dc5b99c179 – < 46da5c3ea011e884028a91cf913db093920a915b
- affected cdae7c07e3e3509eaabc18c1640a55dc5b99c179 – < 07cd2787cdf8942d24a1a3ef81aa89b526fb6381
- affected cdae7c07e3e3509eaabc18c1640a55dc5b99c179 – < a504b9f2797b739e0304d537e8aa4ce883ecce39
- affected 4.15
- unaffected < 4.15
- unaffected 6.1.176 – ≤ 6.1.*
- unaffected 6.6.143 – ≤ 6.6.*
- unaffected 6.12.94 – ≤ 6.12.*
- unaffected 6.18.36 – ≤ 6.18.*
- unaffected 7.0.13 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References7
- https://git.kernel.org/stable/c/a770e62923090d7572f1f5a8507ae551d354a057 (opens in a new tab)
- https://git.kernel.org/stable/c/0dd61ba03d05187726ecdf9c0e2175a81b9b24f6 (opens in a new tab)
- https://git.kernel.org/stable/c/79235c8add5da4bf27a12f5a5dbb579f300c059e (opens in a new tab)
- https://git.kernel.org/stable/c/46da5c3ea011e884028a91cf913db093920a915b (opens in a new tab)
- https://git.kernel.org/stable/c/07cd2787cdf8942d24a1a3ef81aa89b526fb6381 (opens in a new tab)
- https://git.kernel.org/stable/c/a504b9f2797b739e0304d537e8aa4ce883ecce39 (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html (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-2026-39238 (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-2026-53147)Record last updated .