sctp: avoid auth_enable sysctl UAF during netns teardown
In the Linux kernel, the following vulnerability has been resolved: sctp: avoid auth_enable sysctl UAF during netns teardown proc_sctp_do_auth() updates the SCTP control socket after changing net.sctp.auth_enable. The handler gets the per-net SCTP state from ctl->data, so an already opened sysctl file can still target a network namespace while that namespace is being torn down. SCTP previously registered its per-net sysctls from sctp_defaults_init(), while the control socket is created later from sctp_ctrlsock_init(). This exposed a window during initialization where auth_enable was writable before net->sctp.ctl_sock existed, and a teardown window where auth_enable stayed writable after inet_ctl_sock_destroy() had released the control socket. Move the per-net SCTP sysctl registration into sctp_ctrlsock_init() after sctp_ctl_sock_init() succeeds, and unregister the sysctl table before destroying the control socket in sctp_ctrlsock_exit(). If sysctl registration fails after the control socket was created, destroy the control socket in the same init path. Make sctp_sysctl_net_unregister() tolerate a missing header and clear the saved pointer so init-error and exit paths can safely share the unregister helper.
CVE-2026-68162
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-2026-68162
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": "10c869a52f266e40f548cc3c565d14930a5edafc",
"lessThan": "19573dcddb8819fd68d6cd1f916c1c99c3fa4ff4",
"versionType": "git"
},
{
"status": "affected",
"version": "dc583e7e5f8515ca489c0df28e4362a70eade382",
"lessThan": "ceb7190b5c873d4a1267a1600c5aa52c600e929f",
"versionType": "git"
},
{
"status": "affected",
"version": "bd2a2939423566c654545fa3e96a656662a0af9e",
"lessThan": "fd66854a22661929245f3d2b244c432bc8b1a150",
"versionType": "git"
},
{
"status": "affected",
"version": "1b67030d39f2b00f94ac1f0af11ba6657589e4d3",
"lessThan": "158f3cc332dc53f43ec20060233d7c3cecd6d912",
"versionType": "git"
},
{
"status": "affected",
"version": "7ec30c54f339c640aa7e49d7e9f7bbed6bd42bf6",
"lessThan": "66700c0719675e0e118ae83b2d7168dacd69dd3d",
"versionType": "git"
},
{
"status": "affected",
"version": "c184bc621e3cef03ac9ba81a50dda2dae6a21d36",
"lessThan": "626bda8cfe43dff19a9833ff6ba055a817b5455c",
"versionType": "git"
},
{
"status": "affected",
"version": "15649fd5415eda664ef35780c2013adeb5d9c695",
"lessThan": "be6aae9d1b91c603adb35872d37d40e83daf8758",
"versionType": "git"
},
{
"status": "affected",
"version": "15649fd5415eda664ef35780c2013adeb5d9c695",
"lessThan": "a50e73488e0bbdd262b3be3c9a1d8dd078382381",
"versionType": "git"
},
{
"status": "affected",
"version": "15649fd5415eda664ef35780c2013adeb5d9c695",
"lessThan": "f8d5e7846025f4ab15a461235f8ebae9094a361a",
"versionType": "git"
},
{
"status": "affected",
"version": "5.4.290",
"lessThan": "5.4.292",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.10.234",
"lessThan": "5.10.266",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.177",
"lessThan": "5.15.217",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.125",
"lessThan": "6.1.184",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.6.72",
"lessThan": "6.6.151",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.12.10",
"lessThan": "6.12.101",
"versionType": "semver"
}
],
"programFiles": [
"net/sctp/protocol.c",
"net/sctp/sysctl.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.4.292",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"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": "6.6.151",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/sctp/protocol.c",
"net/sctp/sysctl.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-68162
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #41148 · Revision 1
- Added to Heist Feed
- Publisher date