CVE-2026-74602
In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Initialise reader page order in rb_allocate_cpu_buffer() In rb_allocate_cpu_buffer(), bpage->order was omitted, leaving it as 0. This is an issue for a ring-buffer with subbufs bigger than PAGE_SIZE if when freed: free_buffer_page() relies on this value. Align the value with the actual allocation size (buffer::subbuf_order).
Affected versions
Linux kernel versions
6.8
and later are affected. Fixed in
6.18.45,
7.1.9,
7.2
and their respective stable series.
References
3 totalFrequently asked questions
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What is CVE-2026-74602?
CVE-2026-74602 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.8 onward and has been patched in 6.18.45, 7.1.9 and 7.2. CVE-2026-74602 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-74602?
Yes. CVE-2026-74602 has been patched. Fixed versions include 6.18.45, 7.1.9 and 7.2. If you are running Linux kernel 6.8 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-74602 actively exploited?
No. CVE-2026-74602 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.