sctp: sysctl: auth_enable: avoid using current->nsproxy
In the Linux kernel, the following vulnerability has been resolved: sctp: sysctl: auth_enable: avoid using current->nsproxy As mentioned in a previous commit of this series, using the 'net' structure via 'current' is not recommended for different reasons: - Inconsistency: getting info from the reader's/writer's netns vs only from the opener's netns. - current->nsproxy can be NULL in some cases, resulting in an 'Oops' (null-ptr-deref), e.g. when the current task is exiting, as spotted by syzbot [1] using acct(2). The 'net' structure can be obtained from the table->data using container_of(). Note that table->data could also be used directly, but that would increase the size of this fix, while 'sctp.ctl_sock' still needs to be retrieved from 'net' structure.
CVE-2025-21638
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-2025-21638
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": "b14878ccb7fac0242db82720b784ab62c467c0dc",
"lessThan": "cf387cdebfaebae228dfba162f94c567a67610c3",
"versionType": "git"
},
{
"status": "affected",
"version": "b14878ccb7fac0242db82720b784ab62c467c0dc",
"lessThan": "dc583e7e5f8515ca489c0df28e4362a70eade382",
"versionType": "git"
},
{
"status": "affected",
"version": "b14878ccb7fac0242db82720b784ab62c467c0dc",
"lessThan": "bd2a2939423566c654545fa3e96a656662a0af9e",
"versionType": "git"
},
{
"status": "affected",
"version": "b14878ccb7fac0242db82720b784ab62c467c0dc",
"lessThan": "1b67030d39f2b00f94ac1f0af11ba6657589e4d3",
"versionType": "git"
},
{
"status": "affected",
"version": "b14878ccb7fac0242db82720b784ab62c467c0dc",
"lessThan": "7ec30c54f339c640aa7e49d7e9f7bbed6bd42bf6",
"versionType": "git"
},
{
"status": "affected",
"version": "b14878ccb7fac0242db82720b784ab62c467c0dc",
"lessThan": "c184bc621e3cef03ac9ba81a50dda2dae6a21d36",
"versionType": "git"
},
{
"status": "affected",
"version": "b14878ccb7fac0242db82720b784ab62c467c0dc",
"lessThan": "15649fd5415eda664ef35780c2013adeb5d9c695",
"versionType": "git"
},
{
"status": "affected",
"version": "e5eae4a0511241959498b180fa0df0d4f1b11b9c",
"versionType": "git"
},
{
"status": "affected",
"version": "88830f227a1f96e44d82ddfcb0cc81d517ec6dd8",
"versionType": "git"
},
{
"status": "affected",
"version": "3938b0336a93fa5faa242dc9e5823ac69df9e066",
"versionType": "git"
},
{
"status": "affected",
"version": "3.10.41",
"lessThan": "3.11",
"versionType": "semver"
},
{
"status": "affected",
"version": "3.12.21",
"lessThan": "3.13",
"versionType": "semver"
},
{
"status": "affected",
"version": "3.14.5",
"lessThan": "3.15",
"versionType": "semver"
}
],
"programFiles": [
"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": "3.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.4.292",
"versionType": "semver",
"lessThanOrEqual": "5.4.*"
},
{
"status": "unaffected",
"version": "5.10.234",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.177",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.125",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.72",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.10",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.13",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/sctp/sysctl.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-21638
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30423 · Revision 1
- Added to Heist Feed
- Publisher date