CVE-2026-90300

bpf: Clear buf on error in __bpf_get_task_stack

N/A

Published: September 17, 2026 at 04:08 PM UTC

Updated: October 30, 2026 at 01:20 PM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

N/A

Exploit prediction

EPSS 0.2%

Description

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

90%

06ab134ce8ecfa5a69e850f88f81c8a4c3fa91df5.10.30 5.10.96 5.11.14 5.126ab134ce8ecfa5a69e850f88f81c8a4c3fa91df9c020a533eaae1c2d41a7e3835c4c818a9b4b656d921baabd96445ef9c9c9410ca06164359c8a1a5ff6bdc205fd0a83bd365405d4e31fb5905826996

Vendor states this is fixed in f523359c4789bb0396d2d642464a6e2fd4f2299d (fixed)

Vendor states this is fixed in f5d242825ca417bb6afe35fde6e8880f97ca43fb (fixed)

Affected range stops below 5.11, so it looks safe — our inference, not a vendor statement

Vendor states this is fixed in 5.12 (unaffected)

Vendor states this is fixed in 6.12.114 (unaffected)

Vendor states this is fixed in 6.18.57 (unaffected)

Vendor states this is fixed in 6.6.160 (unaffected)

Vendor states this is fixed in 7.2.6 (unaffected)

Vendor states this is fixed in 7.3 (unaffected)

Vendor states this is fixed in 7.3-rc1 (unaffected)