Kernel memory corruption via zero station mask
Published Jul 24, 2026 · Updated Jul 24, 2026
Out-of-bounds access in Linux Kernel 6.4 through 6.18.37 and 6.19 through 7.1.2 allows physically proximate attackers to corrupt kernel memory. Three iwlwifi MLD BA-session handlers subtract one from ffs(ba_data->sta_mask) without rejecting a zero mask, yielding index 0xFFFFFFFF into fw_id_to_link_sta[]. An associated MLO radio peer can drive the aggregation, link-state, DELBA, and timing sequence without a host account, enabling kernel-memory disclosure or corruption and a kernel panic.
Summary
What happened
Out-of-bounds access in Linux Kernel 6.4 through 6.18.37 and 6.19 through 7.1.2 allows physically proximate attackers to corrupt kernel memory. Three iwlwifi MLD BA-session handlers subtract one from ffs(ba_data->sta_mask) without rejecting a zero mask, yielding index 0xFFFFFFFF into fw_id_to_link_sta[]. An associated MLO radio peer can drive the aggregation, link-state, DELBA, and timing sequence without a host account, enabling kernel-memory disclosure or corruption and a kernel panic.
The record
- CVE
- CVE-2026-64255
- Published
- Jul 24, 2026
- Updated
- Jul 24, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- CWE-125
- Attack vector
- adjacent
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jul 24, 2026CVE publishedPublication date reported by the CVE source.
- Jul 24, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <6.18.38
- Affected versionversion=0 <7.1.3
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1de92789ce31e46fa7e7d8e89c90b19cdb1c103b
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <f056fc2b927448d37eca6b6cacc3d1b0f67b20d2
- Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <fe7f339f63c9dc4ca546ed7ac38ba4bb3a99dcfc
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo