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Back to active CVEs
High · CVSS 7.8CVE-2025-39680

i2c: rtl9300: Fix out-of-bounds bug in rtl9300_i2c_smbus_xferCVE-2025-39680

Answer in brief

CVE-2025-39680 records a High severity (CVSS 7.8) vulnerability in i2c: rtl9300: Fix out-of-bounds bug in rtl9300_i2c_smbus_xfer. 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 Sep 5, 2025Updated Oct 19, 2026Source checked Nov 4, 2026First seen by HOL Aug 5, 2026Material review Oct 19, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.8
Exploitation
Not marked as known exploited
Affected software
5 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.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=c366be720235301fdadf67e6f1ea6ff32669c074 <071e43fcba5ddd9a7813e6cc0aa10299eae41b21 || >=c366be720235301fdadf67e6f1ea6ff32669c074 <57f312b955938fc4663f430cb57a71f2414f601b071e43fcba5ddd9a7813e6cc0aa10299eae41b21, 57f312b955938fc4663f430cb57a71f2414f601b
Linux/Linuxgeneric6.13Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to 071e43fcba5ddd9a7813e6cc0aa10299eae41b21 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Sep 5, 2025

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 19, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 5, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: i2c: rtl9300: Fix out-of-bounds bug in rtl9300_i2c_smbus_xfer The data->block[0] variable comes from user. Without proper check, the variable may be very large to cause an out-of-bounds bug. Fix this bug by checking the value of data->block[0] first. 1. commit 39244cc75482 ("i2c: ismt: Fix an out-of-bounds bug in ismt_access()") 2. commit 92fbb6d1296f ("i2c: xgene-slimpro: Fix out-of-bounds bug in xgene_slimpro_i2c_xfer()")

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Mongoose: Heap OOB reads and null-byte bypass in mg_path_is_sane (util.c)Also CWE-125
  • VeraCrypt: Heap overflow and out-of-bounds read in Serializable deserialization (elevated Core service input path)Also CWE-125

Record context

Vulnerability class
Buffer Overflow
EPSS
Not reported
CWE IDs
CWE-125
Source
CVE List V5
Source checked
Nov 4, 2026
References
2 linked sources
Open source record