net: hinic: fix mailbox segment buffer overflow

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-97957
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-25 11:17:23 UTC
Updated2026-09-25 15:18:03 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: net: hinic: fix mailbox segment buffer overflow check_mbox_seq_id_and_seg_len() validates that seq_id does not exceed SEQ_ID_MAX_VAL (42) and seg_len does not exceed MBOX_SEG_LEN (48). However, this allows the last segment (seq_id=42) to carry a full 48-byte payload, writing to offset 42*48=2016 for 48 bytes (ending at byte 2064). The receive buffer is only MBOX_MAX_BUF_SZ (2048) bytes, resulting in a 16-byte heap buffer overflow. The hinic3 driver already handles this correctly by defining MBOX_LAST_SEG_MAX_LEN and rejecting the last segment when it exceeds the remaining buffer space. Apply the same fix to the hinic driver.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

EPSS: 0.001420000 probability, percentile 0.028960000 (date 2026-09-27)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary8.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected a425b6e1c69ba907b72b737a4d44f8cfbc43ce3c eca54a092d5f7b497b458ff5a6f66d4f7bfb6674 git Not specified
CNA Linux Linux affected a425b6e1c69ba907b72b737a4d44f8cfbc43ce3c 9f6ad383901d0cb1c8ea5f7f3160fabfe1540eb5 git Not specified
CNA Linux Linux affected a425b6e1c69ba907b72b737a4d44f8cfbc43ce3c 513f7b16ed0cffae9348151c72bed17c7073096f git Not specified
CNA Linux Linux affected a425b6e1c69ba907b72b737a4d44f8cfbc43ce3c 5d4d985957434867bbe85e4fa5e638f3e48ad522 git Not specified
CNA Linux Linux affected 5.8 Not specified
CNA Linux Linux unaffected 5.8 semver Not specified
CNA Linux Linux unaffected 6.12.111 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.53 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.7 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/eca54a092d5f7b497b458ff5a6f66d4f7bfb6674 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/9f6ad383901d0cb1c8ea5f7f3160fabfe1540eb5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5d4d985957434867bbe85e4fa5e638f3e48ad522 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/513f7b16ed0cffae9348151c72bed17c7073096f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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