CVE-2026-43401: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: cpufreq: intel_pstate: Fix NULL pointer dereference in update_cpu_qos_request() The update_cpu_qos_request() function attempts to initialize the 'freq' variable by dereferencing 'cpudata' before verifying if the 'policy' is valid. This issue occurs on systems booted with the "nosmt" parameter, where all_cpu_data[cpu] is NULL for the SMT sibling threads. As a result, any call to update_qos_requests() will result in a NULL pointer dereference as the code will attempt to access pstate.turbo_freq using the NULL cpudata pointer. Also, pstate.turbo_freq may be updated by intel_pstate_get_hwp_cap() after initializing the 'freq' variable, so it is better to defer the 'freq' until intel_pstate_get_hwp_cap() has been called. Fix this by deferring the 'freq' assignment until after the policy and driver_data have been validated. [ rjw: Added one paragraph to the changelog ]

Засегнати продукти

• Linux Linux: ae1bdd23b99f64335c69d546bff99ca39b894c18 преди 6bfda7ce56e7d14a677b7bcd6c7a5009cc29aa88; ae1bdd23b99f64335c69d546bff99ca39b894c18 преди 42738dffb7b0766a45882dff7989401d78f66f92; ae1bdd23b99f64335c69d546bff99ca39b894c18 преди ab39cc4cb8ceecdc2b61747433e7237f1ac2b789
• Linux Linux: 6.18; преди 6.18; 6.18.19 до 6.18.*; 6.19.9 до 6.19.*; от 7.0 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-2026-43401
• https://nvd.nist.gov/vuln/detail/CVE-2026-43401
• https://git.kernel.org/stable/c/6bfda7ce56e7d14a677b7bcd6c7a5009cc29aa88
• https://git.kernel.org/stable/c/42738dffb7b0766a45882dff7989401d78f66f92
• https://git.kernel.org/stable/c/ab39cc4cb8ceecdc2b61747433e7237f1ac2b789