{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-45909",
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "state": "PUBLISHED",
        "assignerShortName": "Linux",
        "dateReserved": "2026-05-13T15:03:33.084Z",
        "datePublished": "2026-05-27T12:17:23.099Z",
        "dateUpdated": "2026-08-05T12:28:42.127Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
                "shortName": "Linux",
                "dateUpdated": "2026-08-05T12:28:42.127Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nclk: mediatek: Drop __initconst from gates\n\nSince commit 8ceff24a754a (\"clk: mediatek: clk-gate: Refactor\nmtk_clk_register_gate to use mtk_gate struct\") the mtk_gate structs\nare no longer just used for initialization/registration, but also at\nruntime. So drop __initconst annotations."
                }
            ],
            "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 vulnerable code is a clock-gate operation in the MediaTek clk driver, reached only by local clock-framework calls (driver/runtime-PM toggling); no remote network input flows into it, so the attacker needs local system access.\nAC:L - This is a use-after-free that becomes active deterministically once free_initmem() releases the .init.rodata gate arrays; the first runtime toggle of an affected gate reliably dereferences freed memory with no race or attacker-uncontrollable condition.\nPR:L - On these SoCs the affected peripheral gates are toggled by ordinary runtime-PM/device-idle transitions that an unprivileged local user can induce through normal device I/O, so basic unprivileged access suffices.\nUI:N - Triggering only requires a clock enable/disable on an affected gate; no victim action such as opening a file or mounting a filesystem is needed.\nS:U - The dangling pointer and its impact are entirely within the kernel's clock subsystem; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The UAF reads a freed init-memory object whose contents can be reclaimed/sprayed by the attacker, and the controlled gate->regs pointer is dereferenced for register offsets, enabling kernel-memory disclosure.\nI:H - Attacker-influenced freed-memory contents control gate->shift and gate->regs, turning regmap_write(offset, BIT(shift)) into a corrupted/controlled MMIO write — memory corruption leverageable beyond simple modification.\nA:H - Dereferencing the dangling cg->gate pointer (and a corrupted gate->regs) after init memory is freed reliably causes a kernel oops/crash."
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "product": "Linux",
                    "vendor": "Linux",
                    "defaultStatus": "unaffected",
                    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                    "programFiles": [
                        "drivers/clk/mediatek/clk-mt7981-eth.c",
                        "drivers/clk/mediatek/clk-mt8516.c"
                    ],
                    "versions": [
                        {
                            "version": "8ceff24a754ac065123ae0ec9f31ec03aff55f8a",
                            "lessThan": "1debd9ba7eb18af8fb63dc93517c6bbcab0e31ee",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8ceff24a754ac065123ae0ec9f31ec03aff55f8a",
                            "lessThan": "866d8ecc4e789f7d73d6cafd1b122d1b6032b3b1",
                            "status": "affected",
                            "versionType": "git"
                        },
                        {
                            "version": "8ceff24a754ac065123ae0ec9f31ec03aff55f8a",
                            "lessThan": "871afb43e41ad4e8246438de495a939cd0f8113c",
                            "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/clk/mediatek/clk-mt7981-eth.c",
                        "drivers/clk/mediatek/clk-mt8516.c"
                    ],
                    "versions": [
                        {
                            "version": "6.18",
                            "status": "affected"
                        },
                        {
                            "version": "0",
                            "lessThan": "6.18",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.18.14",
                            "lessThanOrEqual": "6.18.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "6.19.4",
                            "lessThanOrEqual": "6.19.*",
                            "status": "unaffected",
                            "versionType": "semver"
                        },
                        {
                            "version": "7.0",
                            "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": "6.18",
                                    "versionEndExcluding": "6.18.14"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.18",
                                    "versionEndExcluding": "6.19.4"
                                },
                                {
                                    "vulnerable": true,
                                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                                    "versionStartIncluding": "6.18",
                                    "versionEndExcluding": "7.0"
                                }
                            ]
                        }
                    ]
                }
            ],
            "references": [
                {
                    "url": "https://git.kernel.org/stable/c/1debd9ba7eb18af8fb63dc93517c6bbcab0e31ee"
                },
                {
                    "url": "https://git.kernel.org/stable/c/866d8ecc4e789f7d73d6cafd1b122d1b6032b3b1"
                },
                {
                    "url": "https://git.kernel.org/stable/c/871afb43e41ad4e8246438de495a939cd0f8113c"
                }
            ],
            "title": "clk: mediatek: Drop __initconst from gates",
            "x_generator": {
                "engine": "bippy-1.2.0"
            }
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    }
}