CVE-2026-89501ring-buffer: Hold cpu_buffer::lock when resizing a subbuf
Updated under an hour ago ()
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It affects Linux. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Hold cpu_buffer::lock when resizing a subbuf Because, ring_buffer_subbuf_order_set() can clear cpu_buffer->free_page, hold cpu_buffer->lock to prevent races with ring_buffer_alloc_read_page() and ring_buffer_free_read_page().
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/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
- Received
- Record last updated
- Oct 19, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 8e7b58c27b3c567316a51079b375b846f9223bba builds before 8a496aaa3da6e8d545896c2370c7e617cc931ae2; 8e7b58c27b3c567316a51079b375b846f9223bba builds before 6fcb0b745a0b80df62eae4a93ce52a2d061f4ac2; from 8e7b58c27b3c567316a51079b375b846f9223bba before bf242baf58de03467f226c8e29554c9495dca7fc; from 8e7b58c27b3c567316a51079b375b846f9223bba before 24974bd0da1b47fd56c975533ead50abf754e74d | CNA record |
References
- https://git.kernel.org/stable/c/8a496aaa3da6e8d545896c2370c7e617cc931ae2
- https://git.kernel.org/stable/c/6fcb0b745a0b80df62eae4a93ce52a2d061f4ac2
- https://git.kernel.org/stable/c/bf242baf58de03467f226c8e29554c9495dca7fc
- https://git.kernel.org/stable/c/24974bd0da1b47fd56c975533ead50abf754e74d
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.