CVE-2025-21638sctp: sysctl: auth_enable: avoid using current->nsproxy
Updated under an hour ago ()
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It affects Linux and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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.
- CVSS
- 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from b14878ccb7fac0242db82720b784ab62c467c0dc before cf387cdebfaebae228dfba162f94c567a67610c3; from b14878ccb7fac0242db82720b784ab62c467c0dc before dc583e7e5f8515ca489c0df28e4362a70eade382; from b14878ccb7fac0242db82720b784ab62c467c0dc before bd2a2939423566c654545fa3e96a656662a0af9e; from b14878ccb7fac0242db82720b784ab62c467c0dc before 1b67030d39f2b00f94ac1f0af11ba6657589e4d3; from b14878ccb7fac0242db82720b784ab62c467c0dc before 7ec30c54f339c640aa7e49d7e9f7bbed6bd42bf6; from b14878ccb7fac0242db82720b784ab62c467c0dc before c184bc621e3cef03ac9ba81a50dda2dae6a21d36; from b14878ccb7fac0242db82720b784ab62c467c0dc before 15649fd5415eda664ef35780c2013adeb5d9c695; e5eae4a0511241959498b180fa0df0d4f1b11b9c; and 5 more ranges | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | CISA ADP |
linux linux_kernel linux:linux_kernel | from 3.10.41 before 3.11; from 3.12.20 before 3.13; from 3.14.5 before 5.4.290; from 5.5 before 5.10.234; from 5.11 before 5.15.177; from 5.16 before 6.1.125; from 6.2 before 6.6.72; from 6.7 before 6.12.10; and 6 more ranges | NVD |
References
- https://git.kernel.org/stable/c/cf387cdebfaebae228dfba162f94c567a67610c3
- https://git.kernel.org/stable/c/dc583e7e5f8515ca489c0df28e4362a70eade382patch
- https://git.kernel.org/stable/c/bd2a2939423566c654545fa3e96a656662a0af9epatch
- https://git.kernel.org/stable/c/1b67030d39f2b00f94ac1f0af11ba6657589e4d3patch
- https://git.kernel.org/stable/c/7ec30c54f339c640aa7e49d7e9f7bbed6bd42bf6patch
- https://git.kernel.org/stable/c/c184bc621e3cef03ac9ba81a50dda2dae6a21d36patch
- https://git.kernel.org/stable/c/15649fd5415eda664ef35780c2013adeb5d9c695patch
- https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html
- https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.