thunderbolt: Validate XDomain request packet size before type cast
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.
CVE-2026-53147
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-53147
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "cdae7c07e3e3509eaabc18c1640a55dc5b99c179",
"lessThan": "a770e62923090d7572f1f5a8507ae551d354a057",
"versionType": "git"
},
{
"status": "affected",
"version": "cdae7c07e3e3509eaabc18c1640a55dc5b99c179",
"lessThan": "0dd61ba03d05187726ecdf9c0e2175a81b9b24f6",
"versionType": "git"
},
{
"status": "affected",
"version": "cdae7c07e3e3509eaabc18c1640a55dc5b99c179",
"lessThan": "79235c8add5da4bf27a12f5a5dbb579f300c059e",
"versionType": "git"
},
{
"status": "affected",
"version": "cdae7c07e3e3509eaabc18c1640a55dc5b99c179",
"lessThan": "46da5c3ea011e884028a91cf913db093920a915b",
"versionType": "git"
},
{
"status": "affected",
"version": "cdae7c07e3e3509eaabc18c1640a55dc5b99c179",
"lessThan": "07cd2787cdf8942d24a1a3ef81aa89b526fb6381",
"versionType": "git"
},
{
"status": "affected",
"version": "cdae7c07e3e3509eaabc18c1640a55dc5b99c179",
"lessThan": "a504b9f2797b739e0304d537e8aa4ce883ecce39",
"versionType": "git"
}
],
"programFiles": [
"drivers/thunderbolt/xdomain.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.176",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.143",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.94",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.36",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.13",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/thunderbolt/xdomain.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-53147
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40759 · Revision 1
- Added to Heist Feed
- Publisher date