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sctp: sysctl: auth_enable: avoid using current->nsproxy

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

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",
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        "lessThan": "1b67030d39f2b00f94ac1f0af11ba6657589e4d3",
        "versionType": "git"
      },
      {
        "status": "affected",
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        "lessThan": "7ec30c54f339c640aa7e49d7e9f7bbed6bd42bf6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b14878ccb7fac0242db82720b784ab62c467c0dc",
        "lessThan": "c184bc621e3cef03ac9ba81a50dda2dae6a21d36",
        "versionType": "git"
      },
      {
        "status": "affected",
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        "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
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