{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-40118", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.168Z", "datePublished": "2025-11-12T10:23:18.179Z", "dateUpdated": "2026-08-05T12:07:55.038Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:07:55.038Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: pm80xx: Fix array-index-out-of-of-bounds on rmmod\n\nSince commit f7b705c238d1 (\"scsi: pm80xx: Set phy_attached to zero when\ndevice is gone\") UBSAN reports:\n\n UBSAN: array-index-out-of-bounds in drivers/scsi/pm8001/pm8001_sas.c:786:17\n index 28 is out of range for type 'pm8001_phy [16]'\n\non rmmod when using an expander.\n\nFor a direct attached device, attached_phy contains the local phy id.\nFor a device behind an expander, attached_phy contains the remote phy\nid, not the local phy id.\n\nI.e. while pm8001_ha will have pm8001_ha->chip->n_phy local phys, for a\ndevice behind an expander, attached_phy can be much larger than\npm8001_ha->chip->n_phy (depending on the amount of phys of the\nexpander).\n\nE.g. on my system pm8001_ha has 8 phys with phy ids 0-7. One of the\nports has an expander connected. The expander has 31 phys with phy ids\n0-30.\n\nThe pm8001_ha->phy array only contains the phys of the HBA. It does not\ncontain the phys of the expander. Thus, it is wrong to use attached_phy\nto index the pm8001_ha->phy array for a device behind an expander.\n\nThus, we can only clear phy_attached for devices that are directly\nattached." } ], "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 out-of-bounds write is reached through local host operations on the pm80xx SAS HBA — system suspend (`pm8001_pci_suspend` → `sas_suspend_ha` → `sas_suspend_devices`), driver unbind/rmmod, or sysfs device delete — none of which cross a network boundary. A physical variant exists (hot-unplugging a drive on an expander phy ≥ 16), but the local suspend path is both reachable and more severe.\nAC:L - Once a SAS device is enumerated behind an expander with more than 16 phys — the standard 24/28/36-phy JBOD backplane configuration described in the commit — every suspend or removal event deterministically performs the OOB write, with no race to win and no unpredictable state required. The offending index is a stable property of the cabled topology, which the attacker can repeatedly re-trigger.\nPR:L - An unprivileged user with an active local session can invoke system suspend through the default logind/polkit policy, and `sas_suspend_devices()` calls `lldd_dev_gone` for every device on `port->dev_list`, including expander children, driving the OOB write without any capability. No CAP_SYS_MODULE or root is needed on this path.\nUI:N - The attacker triggers suspend or device teardown directly; no separate victim needs to open a file, mount a filesystem, or take any action.\nS:U - The corruption is confined to kernel heap memory managed by the same kernel security authority; there is no VM, IOMMU, or sandbox boundary crossed.\nC:H - A controllable-offset out-of-bounds write into and beyond a large kmalloc'd `pm8001_hba_info` object corrupts adjacent slab objects — zeroing a length, index, or pointer byte in a neighbouring structure is a standard route to over-read and kernel memory disclosure. Per kernel scoring guidance, memory corruption leveragable for info disclosure is High.\nI:H - This is a direct out-of-bounds write (`phy[idx].phy_attached = 0` with idx up to 127 into a 16-element array), landing in `asd_sas_port` list heads/spinlocks/pointers, the `devices`/`ccb_info` pointers, and ultimately in unrelated heap objects — a cross-object write primitive with attacker-influenced offset.\nA:H - The bug is confirmed by UBSAN as an array-index-out-of-bounds, and zeroing bytes of live `list_head`s, spinlocks, and kernel pointers reliably produces oopses, corrupted list traversal, or panic on the next use of the clobbered structure." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/scsi/pm8001/pm8001_sas.c" ], "versions": [ { "version": "05b512879eab41faa515b67fa3896d0005e97909", "lessThan": "d94be0a6ae9ade706d4270e740bdb4f79953a7fc", "status": "affected", "versionType": "git" }, { "version": "bc2140c8136200b4437e1abc0fb659968cb9baab", "lessThan": "45acbf154befedd9bc135f5e031fe7855d1e6493", "status": "affected", "versionType": "git" }, { "version": "1d8f9378cb4800c18e20d80ecd605b2b93e87a03", "lessThan": "eef5ef400893f8e3dbb09342583be0cdc716d566", "status": "affected", "versionType": "git" }, { "version": "30e482dfb8f27d22f518695d4bcb5e7f4c6cb08a", "lessThan": "9c671d4dbfbfb0d73cfdfb706afb36d9ad60a582", "status": "affected", "versionType": "git" }, { "version": "a862d24e1fc3ab1b5e5f20878d2898cea346d0ec", "lessThan": "e62251954a128a2d0fcbc19e5fa39e08935bb628", "status": "affected", "versionType": "git" }, { "version": "0f9802f174227f553959422f844eeb9ba72467fe", "lessThan": "9326a1541e1b7ed3efdbab72061b82cf01c6477a", "status": "affected", "versionType": "git" }, { "version": "f7b705c238d1483f0a766e2b20010f176e5c0fb7", "lessThan": "83ced3c206c292458e47c7fac54223abc7141585", "status": "affected", "versionType": "git" }, { "version": "f7b705c238d1483f0a766e2b20010f176e5c0fb7", "lessThan": "251be2f6037fb7ab399f68cd7428ff274133d693", "status": "affected", "versionType": "git" }, { "version": "722026c010fa75bcf9e2373aff1d7930a3d7e3cf", "status": "affected", "versionType": "git" }, { "version": "5.4.293", "lessThan": "5.4.301", "status": "affected", "versionType": "semver" }, { "version": "5.10.237", "lessThan": "5.10.246", "status": "affected", "versionType": "semver" }, { "version": "5.15.181", "lessThan": "5.15.195", "status": "affected", "versionType": "semver" }, { "version": "6.1.136", "lessThan": "6.1.156", "status": "affected", "versionType": "semver" }, { "version": "6.6.89", "lessThan": "6.6.112", "status": "affected", "versionType": "semver" }, { "version": "6.12.26", "lessThan": "6.12.53", "status": "affected", "versionType": "semver" }, { "version": "6.14.5", "lessThan": "6.15", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/scsi/pm8001/pm8001_sas.c" ], "versions": [ { "version": "6.15", "status": "affected" }, { "version": "0", "lessThan": "6.15", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.301", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.246", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.195", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.156", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.112", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.53", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.17.3", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18", "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": "5.4.293", "versionEndExcluding": "5.4.301" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10.237", "versionEndExcluding": "5.10.246" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.15.181", "versionEndExcluding": "5.15.195" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.1.136", "versionEndExcluding": "6.1.156" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.6.89", "versionEndExcluding": "6.6.112" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12.26", "versionEndExcluding": "6.12.53" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "6.17.3" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "6.18" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14.5" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/d94be0a6ae9ade706d4270e740bdb4f79953a7fc" }, { "url": "https://git.kernel.org/stable/c/45acbf154befedd9bc135f5e031fe7855d1e6493" }, { "url": "https://git.kernel.org/stable/c/eef5ef400893f8e3dbb09342583be0cdc716d566" }, { "url": "https://git.kernel.org/stable/c/9c671d4dbfbfb0d73cfdfb706afb36d9ad60a582" }, { "url": "https://git.kernel.org/stable/c/e62251954a128a2d0fcbc19e5fa39e08935bb628" }, { "url": "https://git.kernel.org/stable/c/9326a1541e1b7ed3efdbab72061b82cf01c6477a" }, { "url": "https://git.kernel.org/stable/c/83ced3c206c292458e47c7fac54223abc7141585" }, { "url": "https://git.kernel.org/stable/c/251be2f6037fb7ab399f68cd7428ff274133d693" } ], "title": "scsi: pm80xx: Fix array-index-out-of-of-bounds on rmmod", "x_generator": { "engine": "bippy-1.2.0" } } } }