{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-40901", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-12T12:17:45.579Z", "datePublished": "2024-07-12T12:20:42.859Z", "dateUpdated": "2026-08-05T11:33:53.488Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:33:53.488Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: mpt3sas: Avoid test/set_bit() operating in non-allocated memory\n\nThere is a potential out-of-bounds access when using test_bit() on a single\nword. The test_bit() and set_bit() functions operate on long values, and\nwhen testing or setting a single word, they can exceed the word\nboundary. KASAN detects this issue and produces a dump:\n\n\t BUG: KASAN: slab-out-of-bounds in _scsih_add_device.constprop.0 (./arch/x86/include/asm/bitops.h:60 ./include/asm-generic/bitops/instrumented-atomic.h:29 drivers/scsi/mpt3sas/mpt3sas_scsih.c:7331) mpt3sas\n\n\t Write of size 8 at addr ffff8881d26e3c60 by task kworker/u1536:2/2965\n\nFor full log, please look at [1].\n\nMake the allocation at least the size of sizeof(unsigned long) so that\nset_bit() and test_bit() have sufficient room for read/write operations\nwithout overwriting unallocated memory.\n\n[1] Link: https://lore.kernel.org/all/ZkNcALr3W3KGYYJG@gmail.com/" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:H", "baseScore": 7.3, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The undersized bitmaps are per-HBA kernel objects touched by local device-discovery/reset work and by the `MPT3COMMAND` ioctl on `/dev/mpt3ctl`, which passes a user-supplied `device_handle` to `test_bit()`. Nothing here processes remote network data, so local access is required.\nAC:L - On any controller whose firmware reports a `MaxDevHandle` that is not a multiple of 64, the allocation is deterministically short and every device add/remove or handle-referencing ioctl performs the 8-byte read-modify-write past the requested allocation. No race, no memory-layout grooming, and no unpredictable system state is involved.\nPR:L - The driver performs no `capable()`/`CAP_SYS_RAWIO` check on any of these paths — reachability is governed solely by device-node policy, and appliance, storage-management and container deployments routinely hand `/dev/mpt3ctl` or HBA-attached block devices to a non-root storage group. The OOB write side itself occurs in automatic discovery work that needs no privilege at all, so low privileges are the ceiling of what an attacker needs.\nUI:N - Device discovery, hotplug handling and controller reset run autonomously in the driver's firmware-event workqueue, and the ioctl path is a plain syscall. No victim action of any kind is required.\nS:U - The out-of-bounds access corrupts kernel slab memory from within kernel context; there is no crossing of a VM, IOMMU, or sandbox boundary.\nC:L - `test_bit()` reads an 8-byte word that extends past the allocation, but the overread is strictly bounded to at most 7 adjacent bytes and only the in-bounds bit is consumed, so no meaningful memory contents are returned to the attacker.\nI:H - This is an out-of-bounds write — KASAN reports `Write of size 8` past the slab allocation from `_scsih_add_device` — and the atomic RMW spans neighbouring heap bytes, which can clobber a concurrent non-atomic update to adjacent slab memory. Per the out-of-bounds-write classification this is scored High.\nA:H - The trailing word access crosses the object boundary, which faults into the guard page under KFENCE (enabled by default in mainstream distro and Android kernels) and raises a slab-out-of-bounds BUG under KASAN or SLUB redzoning, producing an oops or, with `panic_on_warn`, a full kernel panic." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/scsi/mpt3sas/mpt3sas_base.c" ], "versions": [ { "version": "c696f7b83edeac804e898952058089143f49ca0a", "lessThan": "e9bce7c751f6d6c7be88c0bc081a66aaf61a23ee", "status": "affected", "versionType": "git" }, { "version": "c696f7b83edeac804e898952058089143f49ca0a", "lessThan": "19649e49a6df07cd2e03e0a11396fd3a99485ec2", "status": "affected", "versionType": "git" }, { "version": "c696f7b83edeac804e898952058089143f49ca0a", "lessThan": "0081d2b3ae0a17a86b8cc0fa3c8bdc54e233ba16", "status": "affected", "versionType": "git" }, { "version": "c696f7b83edeac804e898952058089143f49ca0a", "lessThan": "521f333e644c4246ca04a4fc4772edc53dd2a801", "status": "affected", "versionType": "git" }, { "version": "c696f7b83edeac804e898952058089143f49ca0a", "lessThan": "46bab2bcd771e725ff5ca3a68ba68cfeac45676c", "status": "affected", "versionType": "git" }, { "version": "c696f7b83edeac804e898952058089143f49ca0a", "lessThan": "9079338c5a0d1f1fee34fb1c9e99b754efe414c5", "status": "affected", "versionType": "git" }, { "version": "c696f7b83edeac804e898952058089143f49ca0a", "lessThan": "18abb5db0aa9b2d48f7037a88b41af2eef821674", "status": "affected", "versionType": "git" }, { "version": "c696f7b83edeac804e898952058089143f49ca0a", "lessThan": "4254dfeda82f20844299dca6c38cbffcfd499f41", "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/scsi/mpt3sas/mpt3sas_base.c" ], "versions": [ { "version": "4.10", "status": "affected" }, { "version": "0", "lessThan": "4.10", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.317", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.279", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.221", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.162", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.95", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.35", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.9.6", "lessThanOrEqual": "6.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10", "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": "4.10", "versionEndExcluding": "4.19.317" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "5.4.279" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "5.10.221" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "5.15.162" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "6.1.95" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "6.6.35" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "6.9.6" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "6.10" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/e9bce7c751f6d6c7be88c0bc081a66aaf61a23ee" }, { "url": "https://git.kernel.org/stable/c/19649e49a6df07cd2e03e0a11396fd3a99485ec2" }, { "url": "https://git.kernel.org/stable/c/0081d2b3ae0a17a86b8cc0fa3c8bdc54e233ba16" }, { "url": "https://git.kernel.org/stable/c/521f333e644c4246ca04a4fc4772edc53dd2a801" }, { "url": "https://git.kernel.org/stable/c/46bab2bcd771e725ff5ca3a68ba68cfeac45676c" }, { "url": "https://git.kernel.org/stable/c/9079338c5a0d1f1fee34fb1c9e99b754efe414c5" }, { "url": 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