CVE-2026-90013

CVE CVE-2026-90013EUVD EUVD-2026-80621Published 2026-09-16T10:33:20.000ZLast changed 2026-09-16T14:41:31.000ZCVSS 7.8

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: tracing: Take trace_array reference when opening options file The options files do not take the trace_array reference for the options they represent. This could cause a use-after-free kernel crash if one of these files is opened by one task and another task removes the instance that the option is for. Because it doesn't take a reference upon opening, it will not stop the removal which will free the options descriptor that is being used. As the options are somewhat dynamic in their creation at boot up, each file represents a flag in the trace_array. The trace_array has an array of indexes to represent each of these flags that is stored in the trace_flags_index array. The address of the index array element is used to pass to the inode->i_private pointer. Then that element is read which holds the index (which represents the flag) and then the index is used to calculate the trace_array descriptor from its trace_flags_index array. One issue is that the index element can not be referenced until the trace_array's reference is taken. To handle this, create a new helper function called: trace_array_options_get() that will iterate all the existing trace_arrays in the ftrace_trace_arrays list (under the trace_types_lock), and compare the passed in address of the index element with the entire array of the trace_array's trace_flags_index array. If it matches, then up the corresponding trace_array's reference and return.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Linux — Linux patch: 7.3-rc2; 577b785f55168d5acb3d123ba41bfe8d7981e044 <d0f37d77b9b4b241e0b30ef2562f6353cbda3bec; 2.6.30; 577b785f55168d5acb3d123ba41bfe8d7981e044 <f2951ebd15c36a1ea4820a7f0cbb0b5f1c028b73; patch: 7.2.5; patch: 0; 577b785f55168d5acb3d123ba41bfe8d7981e044 <64a41f4a9a968f54f3792399aa4d2a9fdb23b0a5; patch: 6.18.52

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Linux — Linux

Patchlage reports hits and suspected hits. About everything else this system says nothing — neither this page nor the situation report ever claims that an estate is safe.