CVE-2026-99158: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Fix false warning in ring_buffer_map_get_reader() The mmap reader can warn when it catches up with a writer that is still committing events. rb_get_reader_page() returns NULL in this case, but ring_buffer_map_get_reader() treats that result as an error. The initial rb_per_cpu_empty() check filters out an empty buffer, but it does not guarantee that the next reader page has committed data. Writers do not take reader_lock and can advance commit_page before publishing the committed length on the new page. rb_get_reader_page() can swap to that page, catch up with the writer and return NULL. Handle NULL through the existing no-data exit without warning. Remove the caller's reader_page == commit_page check as well, since the reader-page helper already handles that case. The existing metadata update and return path remain in place.

Засегнати продукти

• Linux Linux: 117c39200d9d760cbd5944bb89efb7b9c51965aa преди 32751946f9b3e502e3d6e42d98b343473112f887; 117c39200d9d760cbd5944bb89efb7b9c51965aa преди 029770f5badedc0f0ff85fc45e24785cbbee4a67; 117c39200d9d760cbd5944bb89efb7b9c51965aa преди 68e6ab180cfb6dfa79652f41ed7899a6d4cf5438; 117c39200d9d760cbd5944bb89efb7b9c51965aa преди 89bab1dba8a0167ef0d819e0f55b6bafa038e87f
• Linux Linux: 6.10; преди 6.10; 6.12.115 до 6.12.*; 6.18.59 до 6.18.*; 7.2.13 до 7.2.*; от 7.3 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99265
• CVE-2026-99261
• CVE-2026-99260

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-99158
• https://nvd.nist.gov/vuln/detail/CVE-2026-99158
• https://git.kernel.org/stable/c/32751946f9b3e502e3d6e42d98b343473112f887
• https://git.kernel.org/stable/c/029770f5badedc0f0ff85fc45e24785cbbee4a67
• https://git.kernel.org/stable/c/68e6ab180cfb6dfa79652f41ed7899a6d4cf5438
• https://git.kernel.org/stable/c/89bab1dba8a0167ef0d819e0f55b6bafa038e87f