CVE-2025-21903

mctp i3c: handle NULL header address

MEDIUM
5.5
CVSS Score
Published: April 1, 2025 at 03:40 PM UTC
Updated: June 17, 2026 at 08:44 AM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.2%

Description

In the Linux kernel, the following vulnerability has been resolved: mctp i3c: handle NULL header address daddr can be NULL if there is no neighbour table entry present, in that case the tx packet should be dropped. saddr will usually be set by MCTP core, but check for NULL in case a packet is transmitted by a different protocol.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

6.13 ≤ v < 6.13.76.7 ≤ v < 6.12.196.7 ≤ v < 6.13.76.7 ≤ v < 6.146.14 rc16.14 rc26.14 rc36.14 rc46.14 rc56.7c8755b29b58ec65be17bcb8c40763d2dcb1f1db5
Vendor states this is fixed in 740bf9c9b715cc327d34b1e2d4ee79fcd4c47a56 (fixed)
Vendor states this is fixed in cf7ee25e70c6edfac4553d6b671e8b19db1d9573 (fixed)
Vendor states this is fixed in d8be54c35aee29d96d1350b1b6f153be4da37c07 (fixed)
Vendor states this is fixed in 6.12.19 (unaffected)
Vendor states this is fixed in 6.13.7 (unaffected)
Vendor states this is fixed in 6.14 (unaffected)
Vendor states this is fixed in 6.7 (unaffected)

References (3)

Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/740bf9c9b715cc327d34b1e2d4ee79fcd4c47a56
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/cf7ee25e70c6edfac4553d6b671e8b19db1d9573
Patch
Source: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
https://git.kernel.org/stable/c/d8be54c35aee29d96d1350b1b6f153be4da37c07

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
NVD-CWE-noinfo

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