Critical Alert 1 Active Exploit Detected Today

CVE-2026-7273 Zyxel GS1900 Series Switches Stack-Based Buffer Overflow Vulnerability →
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CVE-2026-90217NVD

Vulnerability Summary

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.
Severity Level
HIGH(7.8)
Published Date
Sep 17, 2026
Last Modified
Sep 18, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.15%Probability
Root Weakness (CWE)
N/A
CVSS v3.1 Base Metrics — Score 7.8 (HIGH)
Attack VectorLocal
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

Affected & Patched Versions

Affected Versions
  • Linux Linux >= dfab99df147b0d364f0c199f832ff2aedfb2265a and < 6424b9cde9edc7f2098115bbfd1ee3d84a958380
  • Linux Linux >= dfab99df147b0d364f0c199f832ff2aedfb2265a and < 83608e303b95d07afba1c15da0b5d9e513c2f15a
  • Linux Linux >= 6.7
Patched Versions
  • Linux Linux 6424b9cde9edc7f2098115bbfd1ee3d84a958380
  • Linux Linux 83608e303b95d07afba1c15da0b5d9e513c2f15a
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