CVE-2025-21641 (GCVE-0-2025-21641)
Vulnerability from cvelistv5
Published
2025-01-19 10:17
Modified
2025-05-04 07:18
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: mptcp: sysctl: blackhole timeout: avoid using current->nsproxy As mentioned in the previous commit, 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 'pernet' structure can be obtained from the table->data using container_of().
References
Impacted products
Vendor Product Version
Linux Linux Version: 27069e7cb3d1cea9377069266acf19b9cc5ad0ae
Version: 27069e7cb3d1cea9377069266acf19b9cc5ad0ae
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}


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