Kernel memory corruption via unchecked EC port count
Published Sep 11, 2026 · Updated Sep 11, 2026
Out-of-bounds write in the Linux cros_usbpd-charger driver allows attackers controlling the embedded controller to corrupt kernel memory. cros_usbpd_charger_probe() trusts the EC-reported num_charger_ports value as a loop bound and stores pointers past its fixed eight-entry ports array. Reachability requires a malfunctioning, malicious, or compromised ChromeOS embedded controller to report matching port counts above eight; the slab overwrite can corrupt up to 1,976 bytes.
Summary
What happened
Out-of-bounds write in the Linux cros_usbpd-charger driver allows attackers controlling the embedded controller to corrupt kernel memory. cros_usbpd_charger_probe() trusts the EC-reported num_charger_ports value as a loop bound and stores pointers past its fixed eight-entry ports array. Reachability requires a malfunctioning, malicious, or compromised ChromeOS embedded controller to report matching port counts above eight; the slab overwrite can corrupt up to 1,976 bytes.
The record
- CVE
- CVE-2026-89471
- Published
- Sep 11, 2026
- Updated
- Sep 11, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- Unavailable
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 11, 2026CVE publishedPublication date reported by the CVE source.
- Sep 11, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=4.19
- Affected versionversion=f68b883e8fad23ed0ac4756d91594809d78678ed <3d1e01443b221081258ff34ea0cdd0431e4ff62e
- Affected versionversion=f68b883e8fad23ed0ac4756d91594809d78678ed <48355ce49359740f52e94d3623f6fc557ce341f0
- Affected versionversion=f68b883e8fad23ed0ac4756d91594809d78678ed <78be8b7403ff7638162438b664a07d19da76059e
- Affected versionversion=f68b883e8fad23ed0ac4756d91594809d78678ed <fd29d08ee487f3bf50f2575aaa74f78a74b09b21
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
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Public exploit references
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Technologies
Your stack
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Your stack
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