xsk: validate launch-time metadata size
In the Linux kernel, the following vulnerability has been resolved: xsk: validate launch-time metadata size Launch-time metadata extends beyond the first 16 bytes of struct xsk_tx_metadata. Reject the request when the registered metadata area does not contain the complete field. Snapshot the validated flags for the generic transmit path and use that snapshot for request and completion processing, avoiding inconsistent decisions if user space changes the flags concurrently. Note that only xsk_skb_metadata is properly using the flags, __xsk_buff_get_metadata ignores them. Next commits address that.
CVE-2026-74708
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-2026-74708
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": "ca4419f15abd19ba8be1e109661b60f9f5b6c9f0",
"lessThan": "af511afa1d2977f384044df78d6fbf9fba653f7a",
"versionType": "git"
},
{
"status": "affected",
"version": "ca4419f15abd19ba8be1e109661b60f9f5b6c9f0",
"lessThan": "bc63d47611c07b0d5d655fe1a590861931527920",
"versionType": "git"
},
{
"status": "affected",
"version": "ca4419f15abd19ba8be1e109661b60f9f5b6c9f0",
"lessThan": "439ce2dddf3d22129b9113a7881637256a35e936",
"versionType": "git"
},
{
"status": "affected",
"version": "d9d736c416c9a85f84e15435ba82a177262e745b",
"versionType": "git"
},
{
"status": "affected",
"version": "6.14.2",
"lessThan": "6.15",
"versionType": "semver"
}
],
"programFiles": [
"include/net/xdp_sock_drv.h",
"net/xdp/xsk.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.45",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.9",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"include/net/xdp_sock_drv.h",
"net/xdp/xsk.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74708
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #34278 · Revision 1
- Added to Heist Feed
- Publisher date