selinux: avoid sk_socket dereference in selinux_sctp_bind_connect()
In the Linux kernel, the following vulnerability has been resolved: selinux: avoid sk_socket dereference in selinux_sctp_bind_connect() selinux_sctp_bind_connect() dereferences sk->sk_socket to pass a struct socket * to selinux_socket_bind() and selinux_socket_connect_helper(). However, when the hook is invoked from the ASCONF softirq path (sctp_process_asconf), there is no file reference guaranteeing that sk->sk_socket is non-NULL. The setsockopt callers (bindx, connectx, set_primary, sendmsg connect) hold a file reference and are not affected. Both selinux_socket_bind() and selinux_socket_connect_helper() immediately resolve sock->sk, never using the struct socket * for anything else. Refactor the inner logic into helpers that take a struct sock * directly so that selinux_sctp_bind_connect() never needs to touch sk->sk_socket at all.
CVE-2026-72242
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-2026-72242
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": "d452930fd3b9031e59abfeddb2fa383f1403d61a",
"lessThan": "e4f3b8db1b0c5e9f6374b8996d9e1888d1042b55",
"versionType": "git"
},
{
"status": "affected",
"version": "d452930fd3b9031e59abfeddb2fa383f1403d61a",
"lessThan": "2fcaf133a8fd88b69f32ebaecad93fd302da828f",
"versionType": "git"
},
{
"status": "affected",
"version": "d452930fd3b9031e59abfeddb2fa383f1403d61a",
"lessThan": "a4bc2fb8536488b37680c0b66c59434a4b7f8c2f",
"versionType": "git"
},
{
"status": "affected",
"version": "d452930fd3b9031e59abfeddb2fa383f1403d61a",
"lessThan": "5d4d93f9bfbc997ffbb03cd6107e8f6979dbb9b4",
"versionType": "git"
},
{
"status": "affected",
"version": "d452930fd3b9031e59abfeddb2fa383f1403d61a",
"lessThan": "cc8bd47b35eca82393cbad08b1cc86f02e034439",
"versionType": "git"
},
{
"status": "affected",
"version": "d452930fd3b9031e59abfeddb2fa383f1403d61a",
"lessThan": "d61a80b17254be7230bc5544f8e62ddf21ab38e2",
"versionType": "git"
},
{
"status": "affected",
"version": "d452930fd3b9031e59abfeddb2fa383f1403d61a",
"lessThan": "37d642b37ccdc31e1947c2ebc8dc38f03d4a0ceb",
"versionType": "git"
},
{
"status": "affected",
"version": "d452930fd3b9031e59abfeddb2fa383f1403d61a",
"lessThan": "56acfeb10019e200ab6787d01f8d7cbe0f01526f",
"versionType": "git"
}
],
"programFiles": [
"security/selinux/hooks.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.17"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.17",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.266",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.217",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.184",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"security/selinux/hooks.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-72242
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #32983 · Revision 1
- Added to Heist Feed
- Publisher date