{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-64510", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T15:36:31.793Z", "datePublished": "2026-07-25T08:52:03.208Z", "dateUpdated": "2026-08-17T04:57:01.009Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T04:57:01.009Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nACPI: NFIT: core: Fix acpi_nfit_init() error cleanup\n\nIf acpi_nfit_init() fails after adding the acpi_desc object to the\nacpi_descs list, that object is never removed from that list because\nthe acpi_nfit_shutdown() devm action is not added for the NFIT device\nin that case. Next, the acpi_nfit_init() failure causes\nacpi_nfit_probe() to fail, the acpi_desc object is freed, and a\ndangling pointer is left behind in the acpi_descs. Any subsequent\nACPI Machine Check Exception will trigger nfit_handle_mce() which\niterates over acpi_descs and so a use-after-free will occur.\n\nMoreover, if acpi_nfit_probe() returns 0 after installing a notify\nhandler for the NFIT device and without allocating the acpi_desc\nobject and setting the NFIT device's driver data pointer, the\nacpi_desc object will be allocated by acpi_nfit_update_notify()\nand acpi_nfit_init() will be called to initialize it. Regardless\nof whether or not acpi_nfit_init() fails in that case, the\nacpi_nfit_shutdown() devm action is not added for the NFIT device\nand acpi_desc is never removed from the acpi_descs list. If the\nacpi_desc object is freed subsequently on driver removal, any\nsubsequent ACPI MCE will lead to a use-after-free like in the\nprevious case.\n\nTo address the first issue mentioned above, make acpi_nfit_probe()\ncall acpi_nfit_shutdown() directly on acpi_nfit_init() failures and\nto address the other one, add a remove callback to the driver and\nmake it call acpi_nfit_shutdown(). Also, since it is now possible to\npass NULL to acpi_nfit_shutdown() or the acpi_desc object passed to it\nmay not have been initialized, add checks against NULL for acpi_desc and\nits nvdimm_bus field to that function and make acpi_nfit_unregister()\nclear the latter after unregistering the NVDIMM bus." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - No network, wireless, or user-namespace interface reaches this path; the highest reasonable attack path is a local process triggering a qualifying MCE through an accessible poisoned memory mapping.\nAC:H - Exploitation requires a descriptor already made stale by NFIT initialization failure or late initialization followed by removal, plus a usable-address uncorrectable MCE. An unprivileged attacker cannot reliably create all these firmware and hardware conditions.\nPR:L - Once the stale state and poisoned mapping exist, a basic local account can trigger the MCE and spray reclaimed heap memory without capabilities. Deterministic driver removal or software MCE injection is root-only, but is unnecessary in this higher-severity plausible scenario.\nUI:N - No action by another user is required after the vulnerable system state exists; the attacker can access the relevant memory directly.\nS:U - The UAF compromises the same host kernel and does not inherently cross a VM, IOMMU, or other security-authority boundary.\nC:H - The freed descriptor and its subordinate SPA objects contain attacker-reclaimable pointers and linked lists, permitting controlled kernel-memory dereferences and potential arbitrary disclosure.\nI:H - Locking the freed embedded mutex already writes to reclaimed memory, while controlled bus, region, and list pointers can provide stronger write primitives and potential kernel code execution.\nA:H - The dangling descriptor is traversed during MCE processing and can cause an invalid mutex operation, invalid pointer dereference, deadlock, oops, or kernel panic, as established by the [published record](https://nvd.nist.gov/vuln/detail/CVE-2026-64510)." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/acpi/nfit/core.c" ], "versions": [ { "version": "a61fe6f7902ecaa89d5e6c709490fc4324927134", "lessThan": "ee82078e776ae31266cc70fdf62ac17c3c6f100a", "status": "affected", "versionType": "git" }, { "version": "a61fe6f7902ecaa89d5e6c709490fc4324927134", "lessThan": "6ff054cc02a763914773b026cacb429e5fbf64fa", "status": "affected", "versionType": "git" }, { "version": "a61fe6f7902ecaa89d5e6c709490fc4324927134", "lessThan": "b07d22a2d17ad6465c87bd5752bc70e4c16e0ee4", "status": "affected", "versionType": "git" }, { "version": "a61fe6f7902ecaa89d5e6c709490fc4324927134", "lessThan": "c127dbd832bd4b9aef8a749d9f491b74042f9b47", "status": "affected", "versionType": "git" }, { "version": "a61fe6f7902ecaa89d5e6c709490fc4324927134", "lessThan": "df7c92216a1583a76cb0cbf2f21cd68870609b05", "status": "affected", "versionType": "git" }, { "version": "a61fe6f7902ecaa89d5e6c709490fc4324927134", "lessThan": "3b2628f7682aea8d9ce09ad4b9a3bd144b451eaa", "status": "affected", "versionType": "git" }, { "version": "a61fe6f7902ecaa89d5e6c709490fc4324927134", "lessThan": "7d69235bdc581a4346e9bcd6a8bea37d3e1abd25", "status": "affected", "versionType": "git" }, { "version": "a61fe6f7902ecaa89d5e6c709490fc4324927134", "lessThan": "38bf27511ef41bffebd157ec3eba41fc89ba59cd", "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/acpi/nfit/core.c" ], "versions": [ { "version": "4.6", "status": "affected" }, { "version": "0", "lessThan": "4.6", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.4", "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": "4.6", "versionEndExcluding": "5.10.261" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "5.15.212" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.1.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.6.145" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.12.97" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "6.18.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "7.1.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.6", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/ee82078e776ae31266cc70fdf62ac17c3c6f100a" }, { "url": "https://git.kernel.org/stable/c/6ff054cc02a763914773b026cacb429e5fbf64fa" }, { "url": "https://git.kernel.org/stable/c/b07d22a2d17ad6465c87bd5752bc70e4c16e0ee4" }, { "url": "https://git.kernel.org/stable/c/c127dbd832bd4b9aef8a749d9f491b74042f9b47" }, { "url": "https://git.kernel.org/stable/c/df7c92216a1583a76cb0cbf2f21cd68870609b05" }, { "url": "https://git.kernel.org/stable/c/3b2628f7682aea8d9ce09ad4b9a3bd144b451eaa" }, { "url": "https://git.kernel.org/stable/c/7d69235bdc581a4346e9bcd6a8bea37d3e1abd25" }, { "url": "https://git.kernel.org/stable/c/38bf27511ef41bffebd157ec3eba41fc89ba59cd" } ], "title": "ACPI: NFIT: core: Fix acpi_nfit_init() error cleanup", "x_generator": { "engine": "bippy-1.2.0" } } } }