{"id":"CVE-2026-98218","state":"PUBLISHED","title":"i2c: atr: fix dangling adapter pointer on add failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: atr: fix dangling adapter pointer on add failure\n\ni2c_atr_add_adapter() stores atr->adapter[chan_id] before\ni2c_add_adapter() so that the I2C bus notifier can match child clients\nduring registration. On failure the channel is freed but the slot was\nleft pointing at freed memory, which can lead to use-after-free in\ni2c_atr_del_adapter() / cleanup and also block reuse with -EEXIST.\n\nClear the slot on the i2c_add_adapter() error path before freeing chan.","publishedAt":"2026-10-06T08:44:54.034Z","updatedAt":"2026-10-19T09:15:49.004Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a076a860acae77bbdcbd316541e5552e81fb1772","status":"affected","lessThan":"2f5e42edbd232bf705dc5d3a91e06344237e63bb","versionType":"git"},{"version":"a076a860acae77bbdcbd316541e5552e81fb1772","status":"affected","lessThan":"1093835f6aef58a831298d93e0d93f244fa07b84","versionType":"git"},{"version":"a076a860acae77bbdcbd316541e5552e81fb1772","status":"affected","lessThan":"eabf7a3d33cd9fad106d267d00cc842434de8e02","versionType":"git"},{"version":"a076a860acae77bbdcbd316541e5552e81fb1772","status":"affected","lessThan":"a57d9592714506556e30188af72dd3bdb9f647b5","versionType":"git"},{"version":"a076a860acae77bbdcbd316541e5552e81fb1772","status":"affected","lessThan":"ad34235808b63a70ca4989b7a2852923193d06ef","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/i2c/i2c-atr.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/i2c/i2c-atr.c"]}],"references":["https://git.kernel.org/stable/c/2f5e42edbd232bf705dc5d3a91e06344237e63bb","https://git.kernel.org/stable/c/1093835f6aef58a831298d93e0d93f244fa07b84","https://git.kernel.org/stable/c/eabf7a3d33cd9fad106d267d00cc842434de8e02","https://git.kernel.org/stable/c/a57d9592714506556e30188af72dd3bdb9f647b5","https://git.kernel.org/stable/c/ad34235808b63a70ca4989b7a2852923193d06ef"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98218.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98218","state":"PUBLISHED","datePublished":"2026-10-06T08:44:54.034Z","dateUpdated":"2026-10-19T09:15:49.004Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.326Z"},"containers":{"cna":{"title":"i2c: atr: fix dangling adapter pointer on add failure","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: atr: fix dangling adapter pointer on add failure\n\ni2c_atr_add_adapter() stores atr->adapter[chan_id] before\ni2c_add_adapter() so that the I2C bus notifier can match child clients\nduring registration. On failure the channel is freed but the slot was\nleft pointing at freed memory, which can lead to use-after-free in\ni2c_atr_del_adapter() / cleanup and also block reuse with -EEXIST.\n\nClear the slot on the i2c_add_adapter() error path before freeing chan."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"a076a860acae77bbdcbd316541e5552e81fb1772","status":"affected","lessThan":"2f5e42edbd232bf705dc5d3a91e06344237e63bb","versionType":"git"},{"version":"a076a860acae77bbdcbd316541e5552e81fb1772","status":"affected","lessThan":"1093835f6aef58a831298d93e0d93f244fa07b84","versionType":"git"},{"version":"a076a860acae77bbdcbd316541e5552e81fb1772","status":"affected","lessThan":"eabf7a3d33cd9fad106d267d00cc842434de8e02","versionType":"git"},{"version":"a076a860acae77bbdcbd316541e5552e81fb1772","status":"affected","lessThan":"a57d9592714506556e30188af72dd3bdb9f647b5","versionType":"git"},{"version":"a076a860acae77bbdcbd316541e5552e81fb1772","status":"affected","lessThan":"ad34235808b63a70ca4989b7a2852923193d06ef","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/i2c/i2c-atr.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.6","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.6","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.54","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.8","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/i2c/i2c-atr.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/2f5e42edbd232bf705dc5d3a91e06344237e63bb"},{"url":"https://git.kernel.org/stable/c/1093835f6aef58a831298d93e0d93f244fa07b84"},{"url":"https://git.kernel.org/stable/c/eabf7a3d33cd9fad106d267d00cc842434de8e02"},{"url":"https://git.kernel.org/stable/c/a57d9592714506556e30188af72dd3bdb9f647b5"},{"url":"https://git.kernel.org/stable/c/ad34235808b63a70ca4989b7a2852923193d06ef"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:15:49.004Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"6.18.54"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"7.2.8"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}