net: xdp: Disallow attaching device-bound programs in generic mode
In the Linux kernel, the following vulnerability has been resolved: net: xdp: Disallow attaching device-bound programs in generic mode Device-bound programs are used to support RX metadata kfuncs. These kfuncs are driver-specific and rely on the driver context to read the metadata. This means they can't work in generic XDP mode. However, there is no check to disallow such programs from being attached in generic mode, in which case the metadata kfuncs will be called in an invalid context, leading to crashes. Fix this by adding a check to disallow attaching device-bound programs in generic mode.
CVE-2025-21808
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-2025-21808
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": "2b3486bc2d237ec345b3942b7be5deabf8c8fed1",
"lessThan": "b1bc4a35a04cbeb85b6ef5911ec015baa424989f",
"versionType": "git"
},
{
"status": "affected",
"version": "2b3486bc2d237ec345b3942b7be5deabf8c8fed1",
"lessThan": "557707906dd3e34b8a8c265f664d19f95799937e",
"versionType": "git"
},
{
"status": "affected",
"version": "2b3486bc2d237ec345b3942b7be5deabf8c8fed1",
"lessThan": "5a9eae683d6c36e8a7aa31e5eb8b369e41aa66e1",
"versionType": "git"
},
{
"status": "affected",
"version": "2b3486bc2d237ec345b3942b7be5deabf8c8fed1",
"lessThan": "3595599fa8360bb3c7afa7ee50c810b4a64106ea",
"versionType": "git"
}
],
"programFiles": [
"net/core/dev.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.3"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.3",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.76",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.13",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.13.2",
"versionType": "semver",
"lessThanOrEqual": "6.13.*"
},
{
"status": "unaffected",
"version": "6.14",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/core/dev.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-21808
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30432 · Revision 1
- Added to Heist Feed
- Publisher date