CVE-2025-21638
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2025-21638
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-21638.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-21638
- Downstream
- Related
- Published
- 2025-01-19T10:17:56.084Z
- Modified
- 2025-11-28T02:34:45.928360Z
- Summary
- sctp: sysctl: auth_enable: avoid using current->nsproxy
- Details
-
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.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21638.json" }- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/15649fd5415eda664ef35780c2013adeb5d9c695
- https://git.kernel.org/stable/c/1b67030d39f2b00f94ac1f0af11ba6657589e4d3
- https://git.kernel.org/stable/c/7ec30c54f339c640aa7e49d7e9f7bbed6bd42bf6
- https://git.kernel.org/stable/c/bd2a2939423566c654545fa3e96a656662a0af9e
- https://git.kernel.org/stable/c/c184bc621e3cef03ac9ba81a50dda2dae6a21d36
- https://git.kernel.org/stable/c/cf387cdebfaebae228dfba162f94c567a67610c3
- https://git.kernel.org/stable/c/dc583e7e5f8515ca489c0df28e4362a70eade382
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/21xxx/CVE-2025-21638.json
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
- https://nvd.nist.gov/vuln/detail/CVE-2025-21638
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedb14878ccb7fac0242db82720b784ab62c467c0dcFixedcf387cdebfaebae228dfba162f94c567a67610c3Fixeddc583e7e5f8515ca489c0df28e4362a70eade382Fixedbd2a2939423566c654545fa3e96a656662a0af9eFixed1b67030d39f2b00f94ac1f0af11ba6657589e4d3Fixed7ec30c54f339c640aa7e49d7e9f7bbed6bd42bf6Fixedc184bc621e3cef03ac9ba81a50dda2dae6a21d36Fixed15649fd5415eda664ef35780c2013adeb5d9c695
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedLast affectede5eae4a0511241959498b180fa0df0d4f1b11b9cLast affected88830f227a1f96e44d82ddfcb0cc81d517ec6dd8Last affected3938b0336a93fa5faa242dc9e5823ac69df9e066
Linux / Kernel
Package
- Name
- Kernel
Affected ranges
- Type
- ECOSYSTEM
- Events
-
Introduced3.15.0Fixed5.4.292
- Type
- ECOSYSTEM
- Events
-
Introduced5.5.0Fixed5.10.234
- Type
- ECOSYSTEM
- Events
-
Introduced5.11.0Fixed5.15.177
- Type
- ECOSYSTEM
- Events
-
Introduced5.16.0Fixed6.1.125
- Type
- ECOSYSTEM
- Events
-
Introduced6.2.0Fixed6.6.72
- Type
- ECOSYSTEM
- Events
-
Introduced6.7.0Fixed6.12.10