{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-74461", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.901Z", "datePublished": "2026-08-15T12:27:01.924Z", "dateUpdated": "2026-08-19T16:37:00.344Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-19T16:37:00.344Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: imx: Cancel hrtimer before clearing slave pointer\n\nIn i2c_imx_unreg_slave(), the slave pointer is set to NULL after\ndisabling interrupts. However, a pending interrupt might already\nhave started the hrtimer (i2c_imx_slave_timeout) before the pointer\nwas cleared. If the hrtimer fires after i2c_imx->slave is set to\nNULL, the timer callback i2c_imx_slave_finish_op() will call\ni2c_imx_slave_event() with a NULL slave pointer, which results in a\nuse-after-free / NULL pointer dereference.\n\nFix by canceling the hrtimer and waiting for it to complete after\ndisabling interrupts, before clearing the slave pointer." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.4, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The bug is in the imx I2C slave teardown path reached via i2c_slave_unregister during local driver removal on embedded i.MX systems; exploitation requires local proximity to trigger concurrent I2C bus activity on the same controller.\nAC:L - The attacker controls both sides of the race by generating I2C slave traffic to arm/restart the 30us hrtimer while unregister runs, and can retry rapidly across repeated teardown cycles until the window is hit.\nPR:N - No Linux credentials are required when an attacker with physical access to an exposed I2C bus races automated system maintenance (OTA, service restart, driver reload) that calls i2c_slave_unregister on imx slave backends.\nUI:N - Exploitation does not require victim interaction; automated firmware updates or service restarts that unregister the slave driver are sufficient to create the teardown side of the race.\nS:U - Impact is confined to kernel memory corruption and crash on the same host; this is not a VM escape, IOMMU bypass, or cross-security-authority boundary.\nC:H - The timer callback invokes i2c_slave_event with a NULL/freed slave pointer (use-after-free), a memory safety violation that can be leveraged for arbitrary kernel memory read primitives per CVSS UAF guidance.\nI:H - Use-after-free in the slave event callback path can enable heap manipulation and arbitrary kernel write or control-flow hijack, not merely a deterministic NULL dereference crash.\nA:H - Triggering i2c_slave_event with a NULL slave causes kernel oops/panic, and the original patch series notes the last_slave_event loop in i2c_imx_slave_finish_op can hang the system." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/i2c/busses/i2c-imx.c" ], "versions": [ { "version": "f7414cd6923fd7f78e57086fc964ba2dc25db5c1", "lessThan": "e3da77bdb4015051656bb472c295656bbea03b6f", "status": "affected", "versionType": "git" }, { "version": "f7414cd6923fd7f78e57086fc964ba2dc25db5c1", "lessThan": "470fe15fb3bb2eba6629be301ca7e991ee3cfb7e", "status": "affected", "versionType": "git" }, { "version": "f7414cd6923fd7f78e57086fc964ba2dc25db5c1", "lessThan": "a8a1f9ac3d763e721586f15479ef9140b216ddf3", "status": "affected", "versionType": "git" }, { "version": "f7414cd6923fd7f78e57086fc964ba2dc25db5c1", "lessThan": "753060f2b77ff2f386addbd3ecadb95b9f90cddd", "status": "affected", "versionType": "git" }, { "version": "f7414cd6923fd7f78e57086fc964ba2dc25db5c1", "lessThan": "affd62f5719a78135b7441aa49c8cab3c3b5e838", "status": "affected", "versionType": "git" }, { "version": "f7414cd6923fd7f78e57086fc964ba2dc25db5c1", "lessThan": "dab4762ee7f3fd0a01980d5407ba48d0261d3bff", "status": "affected", "versionType": "git" }, { "version": "f7414cd6923fd7f78e57086fc964ba2dc25db5c1", "lessThan": "6ac7702b6cc2b94aaed9ef2d95bfbefcdc90061f", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/i2c/busses/i2c-imx.c" ], "versions": [ { "version": "5.11", "status": "affected" }, { "version": "0", "lessThan": "5.11", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.216", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.183", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.151", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.103", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.44", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.8", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "5.15.216" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.1.183" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.6.151" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.12.103" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.18.44" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "7.1.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/e3da77bdb4015051656bb472c295656bbea03b6f" }, { "url": "https://git.kernel.org/stable/c/470fe15fb3bb2eba6629be301ca7e991ee3cfb7e" }, { "url": "https://git.kernel.org/stable/c/a8a1f9ac3d763e721586f15479ef9140b216ddf3" }, { "url": "https://git.kernel.org/stable/c/753060f2b77ff2f386addbd3ecadb95b9f90cddd" }, { "url": "https://git.kernel.org/stable/c/affd62f5719a78135b7441aa49c8cab3c3b5e838" }, { "url": "https://git.kernel.org/stable/c/dab4762ee7f3fd0a01980d5407ba48d0261d3bff" }, { "url": "https://git.kernel.org/stable/c/6ac7702b6cc2b94aaed9ef2d95bfbefcdc90061f" } ], "title": "i2c: imx: Cancel hrtimer before clearing slave pointer", "x_generator": { "engine": "bippy-1.2.0" } } } }