Bug 2536438 (CVE-2026-90217) - CVE-2026-90217 kernel: bpf: Compare iterator types during state pruning
Summary: CVE-2026-90217 kernel: bpf: Compare iterator types during state pruning
Keywords:
Status: NEW
Alias: CVE-2026-90217
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-09-17 17:50 UTC by OSIDB Bzimport
Modified: 2026-10-13 13:19 UTC (History)
17 users (show)

Fixed In Version:
Clone Of:
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Description OSIDB Bzimport 2026-09-17 17:50:34 UTC 
In the Linux kernel, the following vulnerability has been resolved:

bpf: Compare iterator types during state pruning

An iterator stack slot can be MEM_RCU or PTR_UNTRUSTED. These states
must not be equal, or the verifier can prune an unsafe path.

Compare the pointer type for STACK_ITER slots.
Comment 1 Mauro Matteo Cascella 2026-09-24 12:52:04 UTC 
Upstream advisory:
https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-90217.mbox
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