CVE-2026-90300

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df < f523359c4789bb0396d2d642464a6e2fd4f2299daffected
LinuxLinux06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df < f5d242825ca417bb6afe35fde6e8880f97ca43fbaffected
LinuxLinuxd921baabd96445ef9c9c9410ca06164359c8a1a5affected
LinuxLinux9c020a533eaae1c2d41a7e3835c4c818a9b4b656affected
LinuxLinuxff6bdc205fd0a83bd365405d4e31fb5905826996affected
LinuxLinux5.10.30 < 5.11affected
LinuxLinux5.11.14 < 5.12affected
LinuxLinux5.10.96 < 5.11affected
LinuxLinux5.12affected
LinuxLinux0 < 5.12unaffected
LinuxLinux7.2.6 <= 7.2.*unaffected
LinuxLinux7.3-rc1 <= *unaffected

Weaknesses

References