What’s Vulnerable › Vulnerabilities

CVE-2026-90217: bpf: Compare iterator types during state pruning

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-17 · updated 2026-10-21

Description

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.

Affected products

• Linux kernel: 6.7 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux kernel 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/6424b9cde9edc7f2098115bbfd1ee3d84a958380
• https://git.kernel.org/stable/c/83608e303b95d07afba1c15da0b5d9e513c2f15a
• https://git.kernel.org/stable/c/86bbaf9e6e4fa6c0dfb352e9e11fae328069233a
• https://git.kernel.org/stable/c/e4ab436d5ba61e4910fd49d24bb64ddb34d493d6

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