CVE-2026-43221

In the Linux kernel, the following vulnerability has been resolved: ipmi: ipmb: initialise event handler read bytes IPMB doesn't use i2c reads, but the handler needs to set a value. Otherwise an i2c read will return an uninitialised value from the bus driver.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/102712417bb6aa9a00d852bc59cb0a276db486c4	Patch
https://git.kernel.org/stable/c/2dfbc8c17dd161885336e77e71c336cd62cf6748	Patch
https://git.kernel.org/stable/c/56d5c0557e53c4d8d92a619fa83eaae178165e07	Patch
https://git.kernel.org/stable/c/905554ebd76aeee370bfd5136ea11e0b9d75c6f1	Patch
https://git.kernel.org/stable/c/9f235ccecd03c436cb1683eac16b12f119e54aa9	Patch
https://git.kernel.org/stable/c/f726b3a57e00bb6249c67714c11ae8b4b31719a1	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:7.0:rc1::::::

History

No history.

Information

Published : 2026-05-06 12:16

Updated : 2026-06-17 10:49

NVD link : CVE-2026-43221

Mitre link : CVE-2026-43221

CVE.ORG link : CVE-2026-43221

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-908

Use of Uninitialized Resource

{"id": "CVE-2026-43221", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "63c4eb347164845b380089012fe43992511c0ad3", "lessThan": "905554ebd76aeee370bfd5136ea11e0b9d75c6f1", "versionType": "git"}, {"status": "affected", "version": "63c4eb347164845b380089012fe43992511c0ad3", "lessThan": "56d5c0557e53c4d8d92a619fa83eaae178165e07", "versionType": "git"}, {"status": "affected", "version": "63c4eb347164845b380089012fe43992511c0ad3", "lessThan": "2dfbc8c17dd161885336e77e71c336cd62cf6748", "versionType": "git"}, {"status": "affected", "version": "63c4eb347164845b380089012fe43992511c0ad3", "lessThan": "f726b3a57e00bb6249c67714c11ae8b4b31719a1", "versionType": "git"}, {"status": "affected", "version": "63c4eb347164845b380089012fe43992511c0ad3", "lessThan": "102712417bb6aa9a00d852bc59cb0a276db486c4", "versionType": "git"}, {"status": "affected", "version": "63c4eb347164845b380089012fe43992511c0ad3", "lessThan": "9f235ccecd03c436cb1683eac16b12f119e54aa9", "versionType": "git"}], "programFiles": ["drivers/char/ipmi/ipmi_ipmb.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.16"}, {"status": "unaffected", "version": "0", "lessThan": "5.16", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.165", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.128", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.75", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.16", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.6", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/char/ipmi/ipmi_ipmb.c"], "defaultStatus": "affected"}]}], "published": "2026-05-06T12:16:41.780", "references": [{"url": "https://git.kernel.org/stable/c/102712417bb6aa9a00d852bc59cb0a276db486c4", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/2dfbc8c17dd161885336e77e71c336cd62cf6748", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/56d5c0557e53c4d8d92a619fa83eaae178165e07", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/905554ebd76aeee370bfd5136ea11e0b9d75c6f1", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9f235ccecd03c436cb1683eac16b12f119e54aa9", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f726b3a57e00bb6249c67714c11ae8b4b31719a1", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-908"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipmi: ipmb: initialise event handler read bytes\n\nIPMB doesn't use i2c reads, but the handler needs to set a value.\nOtherwise an i2c read will return an uninitialised value from the bus\ndriver."}], "lastModified": "2026-06-17T10:49:10.777", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "797C7F46-D0BE-4FB8-A502-C5EF8E6B6654", "versionEndExcluding": "6.1.165", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "851E9353-6C09-4CC9-877E-E09DB164A3C2", "versionEndExcluding": "6.6.128", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BCE16369-98ED-41CF-8995-DFDC10B288D2", "versionEndExcluding": "6.12.75", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B4B8CDA9-BADF-4CF5-8B3B-702DE8EEA40B", "versionEndExcluding": "6.18.16", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "373EEEDA-FAA1-4FB4-B6ED-DB4DD99DBE67", "versionEndExcluding": "6.19.6", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}