{"id":"CVE-2026-43221","state":"PUBLISHED","title":"ipmi: ipmb: initialise event handler read bytes","description":"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.","publishedAt":"2026-05-06T11:28:21.579Z","updatedAt":"2026-05-11T22:20:20.815Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"63c4eb347164845b380089012fe43992511c0ad3","status":"affected","lessThan":"905554ebd76aeee370bfd5136ea11e0b9d75c6f1","versionType":"git"},{"version":"63c4eb347164845b380089012fe43992511c0ad3","status":"affected","lessThan":"56d5c0557e53c4d8d92a619fa83eaae178165e07","versionType":"git"},{"version":"63c4eb347164845b380089012fe43992511c0ad3","status":"affected","lessThan":"2dfbc8c17dd161885336e77e71c336cd62cf6748","versionType":"git"},{"version":"63c4eb347164845b380089012fe43992511c0ad3","status":"affected","lessThan":"f726b3a57e00bb6249c67714c11ae8b4b31719a1","versionType":"git"},{"version":"63c4eb347164845b380089012fe43992511c0ad3","status":"affected","lessThan":"102712417bb6aa9a00d852bc59cb0a276db486c4","versionType":"git"},{"version":"63c4eb347164845b380089012fe43992511c0ad3","status":"affected","lessThan":"9f235ccecd03c436cb1683eac16b12f119e54aa9","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/char/ipmi/ipmi_ipmb.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.16","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.16","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.6","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/char/ipmi/ipmi_ipmb.c"]}],"references":["https://git.kernel.org/stable/c/905554ebd76aeee370bfd5136ea11e0b9d75c6f1","https://git.kernel.org/stable/c/56d5c0557e53c4d8d92a619fa83eaae178165e07","https://git.kernel.org/stable/c/2dfbc8c17dd161885336e77e71c336cd62cf6748","https://git.kernel.org/stable/c/f726b3a57e00bb6249c67714c11ae8b4b31719a1","https://git.kernel.org/stable/c/102712417bb6aa9a00d852bc59cb0a276db486c4","https://git.kernel.org/stable/c/9f235ccecd03c436cb1683eac16b12f119e54aa9"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/43xxx/CVE-2026-43221.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43221","state":"PUBLISHED","datePublished":"2026-05-06T11:28:21.579Z","dateUpdated":"2026-05-11T22:20:20.815Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-01T14:12:55.994Z"},"containers":{"cna":{"title":"ipmi: ipmb: initialise event handler read bytes","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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"63c4eb347164845b380089012fe43992511c0ad3","status":"affected","lessThan":"905554ebd76aeee370bfd5136ea11e0b9d75c6f1","versionType":"git"},{"version":"63c4eb347164845b380089012fe43992511c0ad3","status":"affected","lessThan":"56d5c0557e53c4d8d92a619fa83eaae178165e07","versionType":"git"},{"version":"63c4eb347164845b380089012fe43992511c0ad3","status":"affected","lessThan":"2dfbc8c17dd161885336e77e71c336cd62cf6748","versionType":"git"},{"version":"63c4eb347164845b380089012fe43992511c0ad3","status":"affected","lessThan":"f726b3a57e00bb6249c67714c11ae8b4b31719a1","versionType":"git"},{"version":"63c4eb347164845b380089012fe43992511c0ad3","status":"affected","lessThan":"102712417bb6aa9a00d852bc59cb0a276db486c4","versionType":"git"},{"version":"63c4eb347164845b380089012fe43992511c0ad3","status":"affected","lessThan":"9f235ccecd03c436cb1683eac16b12f119e54aa9","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/char/ipmi/ipmi_ipmb.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.16","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.16","versionType":"semver"},{"version":"6.1.165","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.128","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.75","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.16","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.6","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/char/ipmi/ipmi_ipmb.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/905554ebd76aeee370bfd5136ea11e0b9d75c6f1"},{"url":"https://git.kernel.org/stable/c/56d5c0557e53c4d8d92a619fa83eaae178165e07"},{"url":"https://git.kernel.org/stable/c/2dfbc8c17dd161885336e77e71c336cd62cf6748"},{"url":"https://git.kernel.org/stable/c/f726b3a57e00bb6249c67714c11ae8b4b31719a1"},{"url":"https://git.kernel.org/stable/c/102712417bb6aa9a00d852bc59cb0a276db486c4"},{"url":"https://git.kernel.org/stable/c/9f235ccecd03c436cb1683eac16b12f119e54aa9"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T22:20:20.815Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.1.165"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.6.128"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.12.75"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.18.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"6.19.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}