{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-49874", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-10-21T12:17:06.020Z", "datePublished": "2024-10-21T18:01:14.762Z", "dateUpdated": "2026-08-05T11:40:17.116Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:40:17.116Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni3c: master: svc: Fix use after free vulnerability in svc_i3c_master Driver Due to Race Condition\n\nIn the svc_i3c_master_probe function, &master->hj_work is bound with\nsvc_i3c_master_hj_work, &master->ibi_work is bound with\nsvc_i3c_master_ibi_work. And svc_i3c_master_ibi_work can start the\nhj_work, svc_i3c_master_irq_handler can start the ibi_work.\n\nIf we remove the module which will call svc_i3c_master_remove to\nmake cleanup, it will free master->base through i3c_master_unregister\nwhile the work mentioned above will be used. The sequence of operations\nthat may lead to a UAF bug is as follows:\n\nCPU0 CPU1\n\n | svc_i3c_master_hj_work\nsvc_i3c_master_remove |\ni3c_master_unregister(&master->base)|\ndevice_unregister(&master->dev) |\ndevice_release |\n//free master->base |\n | i3c_master_do_daa(&master->base)\n | //use master->base\n\nFix it by ensuring that the work is canceled before proceeding with the\ncleanup in svc_i3c_master_remove." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The UAF is triggered through local operations on the device — driver unbind/module removal via sysfs or rmmod on the platform device — combined with in-kernel workqueue activity on the local I3C controller. No network or remote protocol data reaches this path.\nAC:L - The attacker drives one side of the race directly (repeatable bind/unbind cycles) while the hot-join work is generated by ordinary I3C bus activity, and the window can be widened and retried indefinitely until it is won; per kernel scoring practice a UAF race whose triggering side is attacker-initiated is Low.\nPR:L - The teardown path is reached from local userspace device-management interfaces on the I3C master device, and no authentication beyond ordinary local access to the device/driver interfaces is required to keep re-triggering the removal path; scored at the lower privilege tier consistent with comparable driver-removal UAFs.\nUI:N - No victim action is needed — the removal path and the hot-join work both proceed automatically once the unbind is issued and a hot-join IBI arrives.\nS:U - The corruption and its consequences are confined to the kernel's own memory and security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The use-after-free lets `i3c_master_do_daa()` read `master->base`, `master->bus`, and `master->ops` out of a freed and potentially re-allocated slab object, so an attacker who grooms the heap can read back kernel memory contents through the stale object.\nI:H - The freed object is dereferenced for an indirect call (`master->ops->do_daa(master)`) and for lock manipulation, so heap spraying over the freed allocation gives a control-flow hijack and arbitrary-write primitive rather than a mere stale read.\nA:H - Even unexploited, the use-after-free corrupts kernel state and dereferences freed pointers, reliably producing an oops or panic and taking down the system." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/i3c/master/svc-i3c-master.c" ], "versions": [ { "version": "87e0f28eda36c7843523aa8dd0c5dab3331e9718", "lessThan": "56bddf543d4d7ddeff3f87b554ddacfdf086bffe", "status": "affected", "versionType": "git" }, { "version": "0f74f8b6675cc36d689abb4d9b3d75ab4049b7d7", "lessThan": "4ac637122930cc4ab7e2c22e364cf3aaf96b05b1", "status": "affected", "versionType": "git" }, { "version": "0f74f8b6675cc36d689abb4d9b3d75ab4049b7d7", "lessThan": "4318998892bf8fe99f97bea18c37ae7b685af75a", "status": "affected", "versionType": "git" }, { "version": "0f74f8b6675cc36d689abb4d9b3d75ab4049b7d7", "lessThan": "27b55724d3f781dd6e635e89dc6e2fd78fa81a00", "status": "affected", "versionType": "git" }, { "version": "0f74f8b6675cc36d689abb4d9b3d75ab4049b7d7", "lessThan": "61850725779709369c7e907ae8c7c75dc7cec4f3", "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/i3c/master/svc-i3c-master.c" ], "versions": [ { "version": "6.4", "status": "affected" }, { "version": "0", "lessThan": "6.4", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.55", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10.14", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.11.3", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12", "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": "6.4", "versionEndExcluding": "6.6.55" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.10.14" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.11.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.4", "versionEndExcluding": "6.12" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/56bddf543d4d7ddeff3f87b554ddacfdf086bffe" }, { "url": "https://git.kernel.org/stable/c/4ac637122930cc4ab7e2c22e364cf3aaf96b05b1" }, { "url": "https://git.kernel.org/stable/c/4318998892bf8fe99f97bea18c37ae7b685af75a" }, { "url": "https://git.kernel.org/stable/c/27b55724d3f781dd6e635e89dc6e2fd78fa81a00" }, { "url": "https://git.kernel.org/stable/c/61850725779709369c7e907ae8c7c75dc7cec4f3" } ], "title": "i3c: master: svc: Fix use after free vulnerability in svc_i3c_master Driver Due to Race Condition", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-49874", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-10-22T13:46:33.404172Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-10-22T13:48:51.538Z" } } ] } }