{"id":"CVE-2023-52791","state":"PUBLISHED","title":"i2c: core: Run atomic i2c xfer when !preemptible","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: core: Run atomic i2c xfer when !preemptible\n\nSince bae1d3a05a8b, i2c transfers are non-atomic if preemption is\ndisabled. However, non-atomic i2c transfers require preemption (e.g. in\nwait_for_completion() while waiting for the DMA).\n\npanic() calls preempt_disable_notrace() before calling\nemergency_restart(). Therefore, if an i2c device is used for the\nrestart, the xfer should be atomic. This avoids warnings like:\n\n[   12.667612] WARNING: CPU: 1 PID: 1 at kernel/rcu/tree_plugin.h:318 rcu_note_context_switch+0x33c/0x6b0\n[   12.676926] Voluntary context switch within RCU read-side critical section!\n...\n[   12.742376]  schedule_timeout from wait_for_completion_timeout+0x90/0x114\n[   12.749179]  wait_for_completion_timeout from tegra_i2c_wait_completion+0x40/0x70\n...\n[   12.994527]  atomic_notifier_call_chain from machine_restart+0x34/0x58\n[   13.001050]  machine_restart from panic+0x2a8/0x32c\n\nUse !preemptible() instead, which is basically the same check as\npre-v5.2.","publishedAt":"2024-05-21T15:31:06.997Z","updatedAt":"2026-05-11T19:33:13.121Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"bae1d3a05a8b99bd748168bbf8155a1d047c562e","status":"affected","lessThan":"25eb381a736e7ae39a4245ef5c96484eb1073809","versionType":"git"},{"version":"bae1d3a05a8b99bd748168bbf8155a1d047c562e","status":"affected","lessThan":"25284c46b657f48c0f3880a2e0706c70d81182c0","versionType":"git"},{"version":"bae1d3a05a8b99bd748168bbf8155a1d047c562e","status":"affected","lessThan":"f6237afabc349c1c7909db00e15d2816519e0d2b","versionType":"git"},{"version":"bae1d3a05a8b99bd748168bbf8155a1d047c562e","status":"affected","lessThan":"185f3617adc8fe45e40489b458f03911f0dec46c","versionType":"git"},{"version":"bae1d3a05a8b99bd748168bbf8155a1d047c562e","status":"affected","lessThan":"8c3fa52a46ff4d208cefb1a462ec94e0043a91e1","versionType":"git"},{"version":"bae1d3a05a8b99bd748168bbf8155a1d047c562e","status":"affected","lessThan":"3473cf43b9068b9dfef2f545f833f33c6a544b91","versionType":"git"},{"version":"bae1d3a05a8b99bd748168bbf8155a1d047c562e","status":"affected","lessThan":"aa49c90894d06e18a1ee7c095edbd2f37c232d02","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/i2c/i2c-core.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.2","versionType":"semver"},{"version":"5.4.262","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.202","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.140","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.64","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.5.13","status":"unaffected","lessThanOrEqual":"6.5.*","versionType":"semver"},{"version":"6.6.3","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.7","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-core.h"]}],"references":["https://git.kernel.org/stable/c/25eb381a736e7ae39a4245ef5c96484eb1073809","https://git.kernel.org/stable/c/25284c46b657f48c0f3880a2e0706c70d81182c0","https://git.kernel.org/stable/c/f6237afabc349c1c7909db00e15d2816519e0d2b","https://git.kernel.org/stable/c/185f3617adc8fe45e40489b458f03911f0dec46c","https://git.kernel.org/stable/c/8c3fa52a46ff4d208cefb1a462ec94e0043a91e1","https://git.kernel.org/stable/c/3473cf43b9068b9dfef2f545f833f33c6a544b91","https://git.kernel.org/stable/c/aa49c90894d06e18a1ee7c095edbd2f37c232d02"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/52xxx/CVE-2023-52791.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-52791","state":"PUBLISHED","datePublished":"2024-05-21T15:31:06.997Z","dateUpdated":"2026-05-11T19:33:13.121Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-05-21T15:19:24.241Z"},"containers":{"cna":{"title":"i2c: core: Run atomic i2c xfer when !preemptible","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: core: Run atomic i2c xfer when !preemptible\n\nSince bae1d3a05a8b, i2c transfers are non-atomic if preemption is\ndisabled. However, non-atomic i2c transfers require preemption (e.g. in\nwait_for_completion() while waiting for the DMA).\n\npanic() calls preempt_disable_notrace() before calling\nemergency_restart(). Therefore, if an i2c device is used for the\nrestart, the xfer should be atomic. This avoids warnings like:\n\n[   12.667612] WARNING: CPU: 1 PID: 1 at kernel/rcu/tree_plugin.h:318 rcu_note_context_switch+0x33c/0x6b0\n[   12.676926] Voluntary context switch within RCU read-side critical section!\n...\n[   12.742376]  schedule_timeout from wait_for_completion_timeout+0x90/0x114\n[   12.749179]  wait_for_completion_timeout from tegra_i2c_wait_completion+0x40/0x70\n...\n[   12.994527]  atomic_notifier_call_chain from machine_restart+0x34/0x58\n[   13.001050]  machine_restart from panic+0x2a8/0x32c\n\nUse !preemptible() instead, which is basically the same check as\npre-v5.2."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"bae1d3a05a8b99bd748168bbf8155a1d047c562e","status":"affected","lessThan":"25eb381a736e7ae39a4245ef5c96484eb1073809","versionType":"git"},{"version":"bae1d3a05a8b99bd748168bbf8155a1d047c562e","status":"affected","lessThan":"25284c46b657f48c0f3880a2e0706c70d81182c0","versionType":"git"},{"version":"bae1d3a05a8b99bd748168bbf8155a1d047c562e","status":"affected","lessThan":"f6237afabc349c1c7909db00e15d2816519e0d2b","versionType":"git"},{"version":"bae1d3a05a8b99bd748168bbf8155a1d047c562e","status":"affected","lessThan":"185f3617adc8fe45e40489b458f03911f0dec46c","versionType":"git"},{"version":"bae1d3a05a8b99bd748168bbf8155a1d047c562e","status":"affected","lessThan":"8c3fa52a46ff4d208cefb1a462ec94e0043a91e1","versionType":"git"},{"version":"bae1d3a05a8b99bd748168bbf8155a1d047c562e","status":"affected","lessThan":"3473cf43b9068b9dfef2f545f833f33c6a544b91","versionType":"git"},{"version":"bae1d3a05a8b99bd748168bbf8155a1d047c562e","status":"affected","lessThan":"aa49c90894d06e18a1ee7c095edbd2f37c232d02","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/i2c/i2c-core.h"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.2","versionType":"semver"},{"version":"5.4.262","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.202","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.140","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.64","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.5.13","status":"unaffected","lessThanOrEqual":"6.5.*","versionType":"semver"},{"version":"6.6.3","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.7","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-core.h"]}],"references":[{"url":"https://git.kernel.org/stable/c/25eb381a736e7ae39a4245ef5c96484eb1073809"},{"url":"https://git.kernel.org/stable/c/25284c46b657f48c0f3880a2e0706c70d81182c0"},{"url":"https://git.kernel.org/stable/c/f6237afabc349c1c7909db00e15d2816519e0d2b"},{"url":"https://git.kernel.org/stable/c/185f3617adc8fe45e40489b458f03911f0dec46c"},{"url":"https://git.kernel.org/stable/c/8c3fa52a46ff4d208cefb1a462ec94e0043a91e1"},{"url":"https://git.kernel.org/stable/c/3473cf43b9068b9dfef2f545f833f33c6a544b91"},{"url":"https://git.kernel.org/stable/c/aa49c90894d06e18a1ee7c095edbd2f37c232d02"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:33:13.121Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"5.4.262"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"5.10.202"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"5.15.140"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"6.1.64"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"6.5.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"6.6.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.2","versionEndExcluding":"6.7"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA 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