Revert "net/smc: Introduce TCP ULP support"
In the Linux kernel, the following vulnerability has been resolved: Revert "net/smc: Introduce TCP ULP support" This reverts commit d7cd421da9da2cc7b4d25b8537f66db5c8331c40. As reported by Al Viro, the TCP ULP support for SMC is fundamentally broken. The implementation attempts to convert an active TCP socket into an SMC socket by modifying the underlying `struct file`, dentry, and inode in-place, which violates core VFS invariants that assume these structures are immutable for an open file, creating a risk of use after free errors and general system instability. Given the severity of this design flaw and the fact that cleaner alternatives (e.g., LD_PRELOAD, BPF) exist for legacy application transparency, the correct course of action is to remove this feature entirely.
CVE-2026-46330
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-2026-46330
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": "d7cd421da9da2cc7b4d25b8537f66db5c8331c40",
"lessThan": "74d33525db50d9d95156c79cc874752654e66e70",
"versionType": "git"
},
{
"status": "affected",
"version": "d7cd421da9da2cc7b4d25b8537f66db5c8331c40",
"lessThan": "dc824ffc28e5c9d0020b6bee2651b4aceed5b2bf",
"versionType": "git"
},
{
"status": "affected",
"version": "d7cd421da9da2cc7b4d25b8537f66db5c8331c40",
"lessThan": "dc24e03be0e4bb2aad1a9b272c4f86de3b11969a",
"versionType": "git"
},
{
"status": "affected",
"version": "d7cd421da9da2cc7b4d25b8537f66db5c8331c40",
"lessThan": "6c505d95c69e27dbf28fea29dc84d2498d69515c",
"versionType": "git"
},
{
"status": "affected",
"version": "d7cd421da9da2cc7b4d25b8537f66db5c8331c40",
"lessThan": "df31a6b0a3057e66994ad6ccf5d95b9b9514f033",
"versionType": "git"
}
],
"programFiles": [
"net/smc/af_smc.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.17",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.4",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/smc/af_smc.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-46330
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #46343 · Revision 1
- Added to Heist Feed
- Publisher date