In the Linux kernel, the following vulnerability has been resolved: net: txgbe: fix heap overflow when reading module EEPROM… (CVE-2026-68440)
A heap overflow vulnerability in the Linux kernel's txgbe driver was resolved. The issue occurs because the function txgbe_read_eeprom_hostif() copies more bytes than the caller buffer allocated by ethtool when the length is not 4-byte aligned, leading to an out-of-bounds write. The fix involves copying only the remaining bytes on the final dword to prevent overflow.
AI Analysis
Technical Summary
The Linux kernel txgbe driver contained a heap overflow vulnerability in the txgbe_read_eeprom_hostif() function. This function always copies round_up(length, 4) bytes into a buffer allocated with exactly 'length' bytes by ethtool. When 'length' is not a multiple of 4, this causes an out-of-bounds write beyond the allocated buffer. The vulnerability was fixed by adjusting the copy operation to only copy the remaining bytes on the final dword, preventing the overflow.
Potential Impact
This vulnerability could lead to a heap overflow in the kernel space when reading the module EEPROM via the txgbe driver. Such an out-of-bounds write could potentially cause memory corruption, leading to system instability or escalation of privileges. However, no known exploits in the wild have been reported.
Mitigation Recommendations
A fix for this vulnerability has been implemented in the Linux kernel. Users should update to a kernel version that includes this fix. Since no vendor advisory or patch links are provided, check the official Linux kernel release notes or trusted vendor advisories for the specific patched versions and apply updates accordingly.
In the Linux kernel, the following vulnerability has been resolved: net: txgbe: fix heap overflow when reading module EEPROM… (CVE-2026-68440)
Description
A heap overflow vulnerability in the Linux kernel's txgbe driver was resolved. The issue occurs because the function txgbe_read_eeprom_hostif() copies more bytes than the caller buffer allocated by ethtool when the length is not 4-byte aligned, leading to an out-of-bounds write. The fix involves copying only the remaining bytes on the final dword to prevent overflow.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel txgbe driver contained a heap overflow vulnerability in the txgbe_read_eeprom_hostif() function. This function always copies round_up(length, 4) bytes into a buffer allocated with exactly 'length' bytes by ethtool. When 'length' is not a multiple of 4, this causes an out-of-bounds write beyond the allocated buffer. The vulnerability was fixed by adjusting the copy operation to only copy the remaining bytes on the final dword, preventing the overflow.
Potential Impact
This vulnerability could lead to a heap overflow in the kernel space when reading the module EEPROM via the txgbe driver. Such an out-of-bounds write could potentially cause memory corruption, leading to system instability or escalation of privileges. However, no known exploits in the wild have been reported.
Mitigation Recommendations
A fix for this vulnerability has been implemented in the Linux kernel. Users should update to a kernel version that includes this fix. Since no vendor advisory or patch links are provided, check the official Linux kernel release notes or trusted vendor advisories for the specific patched versions and apply updates accordingly.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-mr83-4qj4-pp44
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-68440"]
- Ecosystems
- []
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a7c9b69bf8831d539cdf6df
Added to database: 08/12/2026, 16:12:25 UTC
Last enriched: 08/12/2026, 17:19:27 UTC
Last updated: 08/13/2026, 00:41:14 UTC
Views: 2
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