net: txgbe: fix heap overflow when reading module EEPROM (CVE-2026-68440) | HOL Guard CVE

High · CVSS 7.8CVE-2026-68440

net: txgbe: fix heap overflow when reading module EEPROM

Answer in brief

CVE-2026-68440 records a High severity (CVSS 7.8) vulnerability in net: txgbe: fix heap overflow when reading module EEPROM. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Aug 12, 2026Updated Aug 17, 2026Source checked Sep 26, 2026First seen by HOL Aug 12, 2026Material review Aug 17, 2026

Upstream Advisory

Key facts

Risk: High · CVSS 7.8
Exploitation: Not marked as known exploited
Affected software: 2 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=9b97b6b5635b3de18debd07a3adcf25198ec8299 <febcced6958158e7e90a55a8567b3f5c3639c0b9 \|\| >=9b97b6b5635b3de18debd07a3adcf25198ec8299 <6a905a71fd43ce8b45f05044b11491337f232c9d	febcced6958158e7e90a55a8567b3f5c3639c0b9, 6a905a71fd43ce8b45f05044b11491337f232c9d
Linux/Linuxgeneric	6.19	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to febcced6958158e7e90a55a8567b3f5c3639c0b9 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Aug 12, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 17, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 12, 2026

Sources and claim methodology

Upstream source description

In the Linux kernel, the following vulnerability has been resolved: net: txgbe: fix heap overflow when reading module EEPROM txgbe_read_eeprom_hostif() always copies round_up(length, 4) bytes into the caller buffer, which ethtool allocates with exactly 'length' bytes. A non-4-aligned length therefore causes an out-of-bounds write. Copy only the remaining bytes on the final dword instead.

Quoted source text, attributed separately from HOL analysis.