Kernel memory corruption via oversized EEPROM copy
Published Aug 12, 2026 · Updated Aug 12, 2026
Out-of-bounds write in the Linux kernel 6.19 txgbe driver allows local users to corrupt kernel memory through an ethtool EEPROM read. txgbe_read_eeprom_hostif() copies each four-byte word into a buffer sized to the requested length, so a non-aligned final word writes past the allocation. Reachability requires a Wangxun adapter using txgbe and local low-privilege access to the ethtool operation; the bounded demonstrated consequence is a kernel crash.
Summary
What happened
Out-of-bounds write in the Linux kernel 6.19 txgbe driver allows local users to corrupt kernel memory through an ethtool EEPROM read. txgbe_read_eeprom_hostif() copies each four-byte word into a buffer sized to the requested length, so a non-aligned final word writes past the allocation. Reachability requires a Wangxun adapter using txgbe and local low-privilege access to the ethtool operation; the bounded demonstrated consequence is a kernel crash.
The record
- CVE
- CVE-2026-68440
- Published
- Aug 12, 2026
- Updated
- Aug 12, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-787, T1499
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Aug 12, 2026CVE publishedPublication date reported by the CVE source.
- Aug 12, 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=6.19
- Affected versionversion=9b97b6b5635b3de18debd07a3adcf25198ec8299 <6a905a71fd43ce8b45f05044b11491337f232c9d
- Affected versionversion=9b97b6b5635b3de18debd07a3adcf25198ec8299 <febcced6958158e7e90a55a8567b3f5c3639c0b9
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
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Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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