CVE-2026-43272None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: ring-buffer: Fix possible dereference of uninitialized pointer There is a pointer head_page in rb_meta_validate_events() which is not initialized at the beginning of a…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Oct 21.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.2%
In the Linux kernel, the following vulnerability has been resolved:
ring-buffer: Fix possible dereference of uninitialized pointer
There is a pointer head_page in rb_meta_validate_events() which is not initialized at the beginning of a function. This pointer can be dereferenced if there is a failure during reader page validation. In this case the control is passed to "invalid" label where the pointer is dereferenced in a loop.
To fix the issue initialize orig_head and head_page before calling rb_validate_buffer.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Linux >= 5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 < a4afdff9c715af50cf6c3f2dc601932c2cea17a2Linux >= 5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 < bc77986f3cb7476637052edf2d87137fa39f153dLinux >= 5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 < d9942396845fef2369478c157b26738fe07142f6Linux >= 5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 < f1547779402c4cd67755c33616b7203baa88420bLinux 6.12Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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