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.

Package Linux Kernel
Published 2026-09-17
Last modified 2026-09-17
Patch available
Yes

Affected versions

Linux kernel versions 5.10.30, 5.11.14, 5.10.96, 5.12 and later are affected. Fixed in 7.2.6, 7.3-rc1 and their respective stable series.

Affected from
≥ 5.10.30 ≥ 5.11.14 ≥ 5.10.96 ≥ 5.12
Fixed in
✓ 7.2.6 7.2.x ✓ 7.3-rc1

References

2 total

Frequently asked questions

  • What is CVE-2026-90300?

    CVE-2026-90300 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.10.30 onward and has been patched in 7.2.6 and 7.3-rc1. CVE-2026-90300 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

  • Is there a patch available for CVE-2026-90300?

    Yes. CVE-2026-90300 has been patched. Fixed versions include 7.2.6 and 7.3-rc1. If you are running Linux kernel 5.10.30 or later up to the fix versions, apply the relevant patch for your kernel branch.

  • Is CVE-2026-90300 actively exploited?

    No. CVE-2026-90300 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

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