hwmon: (tps53679) Fix array access with zero-length block read

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Summary

CVECVE-2026-43005
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-01 15:16:44 UTC
Updated2026-05-12 19:27:29 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: hwmon: (tps53679) Fix array access with zero-length block read i2c_smbus_read_block_data() can return 0, indicating a zero-length read. When this happens, tps53679_identify_chip() accesses buf[ret - 1] which is buf[-1], reading one byte before the buffer on the stack. Fix by changing the check from "ret < 0" to "ret <= 0", treating a zero-length read as an error (-EIO), which prevents the out-of-bounds array access. Also fix a typo in the adjacent comment: "if present" instead of duplicate "if".

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from [email protected]

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

EPSS: 0.000170000 probability, percentile 0.040610000 (date 2026-05-05)

Problem Types: CWE-125

CVSS v3.1 Breakdown

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

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 75ca1e5875fe3f0b9d0e8615c69f49bc2c7fb65d 79b7e588399bb55f4c10bea6ca41b6c3b944d2bb git Not specified
CNA Linux Linux affected 75ca1e5875fe3f0b9d0e8615c69f49bc2c7fb65d 6999b4769e2a61c463158927102e8c07e3f69ba2 git Not specified
CNA Linux Linux affected 75ca1e5875fe3f0b9d0e8615c69f49bc2c7fb65d 0e211f6aaa6a00fd0ee0c1eea5498f168c6725e6 git Not specified
CNA Linux Linux affected 6.17 Not specified
CNA Linux Linux unaffected 6.17 semver Not specified
CNA Linux Linux unaffected 6.18.22 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.12 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/0e211f6aaa6a00fd0ee0c1eea5498f168c6725e6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/79b7e588399bb55f4c10bea6ca41b6c3b944d2bb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/6999b4769e2a61c463158927102e8c07e3f69ba2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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