CVE-2026-90300

In the Linux kernel, the following vulnerability has been resolved: bpf: Clear buf on error in __bpf_get_task_stack Both bpf_get_task_stack and bpf_get_task_stack_sleepable helpers that use __bpf_get_task_stack have buf defined as ARG_PTR_TO_UNINIT_MEM argument and we should initialize the buf on every return path. Adding missing buf memset for __bpf_get_task_stack fail paths. This provides deterministic buffer contents, which is useful when the buffer is used directly as a map key.

• https://git.kernel.org/stable/c/1f0f61573ba4cb899105b5cef65be3ca02205f93
• https://git.kernel.org/stable/c/4acc761b4e3feca1eb648d21fc4d665b23c5372d
• https://git.kernel.org/stable/c/5c4c57a277a87ed235183d03b671d346f5101f62
• https://git.kernel.org/stable/c/6f5a7bcc049709af12e403111d5e73e80910dafc
• https://git.kernel.org/stable/c/f523359c4789bb0396d2d642464a6e2fd4f2299d
• https://git.kernel.org/stable/c/f5d242825ca417bb6afe35fde6e8880f97ca43fb