CVE-2026-45909

{"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 \u2014 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"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/clk/mediatek/clk-mt7981-eth.c", "drivers/clk/mediatek/clk-mt8516.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "1debd9ba7eb18af8fb63dc93517c6bbcab0e31ee", "status": "affected", "version": "8ceff24a754ac065123ae0ec9f31ec03aff55f8a", "versionType": "git"}, {"lessThan": "866d8ecc4e789f7d73d6cafd1b122d1b6032b3b1", "status": "affected", "version": "8ceff24a754ac065123ae0ec9f31ec03aff55f8a", "versionType": "git"}, {"lessThan": "871afb43e41ad4e8246438de495a939cd0f8113c", "status": "affected", "version": "8ceff24a754ac065123ae0ec9f31ec03aff55f8a", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/clk/mediatek/clk-mt7981-eth.c", "drivers/clk/mediatek/clk-mt8516.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.18"}, {"lessThan": "6.18", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.14", "versionType": "semver"}, {"lessThanOrEqual": "6.19.*", "status": "unaffected", "version": "6.19.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "3E0E101B-8972-4E77-80E0-D97AC3CA57C1", "versionEndExcluding": "6.18.14", "versionStartIncluding": "6.18", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "672A3E79-EC03-479D-8503-361DFBDC8092", "versionEndExcluding": "6.19.4", "versionStartIncluding": "6.19", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "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."}], "id": "CVE-2026-45909", "lastModified": "2026-06-24T14:55:29.343", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-05-27T14:17:05.453", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1debd9ba7eb18af8fb63dc93517c6bbcab0e31ee"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/866d8ecc4e789f7d73d6cafd1b122d1b6032b3b1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/871afb43e41ad4e8246438de495a939cd0f8113c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Undergoing Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: clk: mediatek: Drop __initconst from gates", "id": "2482021", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482021"}, "csaw": false, "cwe": "CWE-824", "details": ["No description is available for this CVE."], "name": "CVE-2026-45909", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-45909\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-45909\nhttps://lore.kernel.org/linux-cve-announce/2026052721-CVE-2026-45909-a8e8@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8ceff24a754ac065123ae0ec9f31ec03aff55f8a,1debd9ba7eb18af8fb63dc93517c6bbcab0e31ee)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8ceff24a754ac065123ae0ec9f31ec03aff55f8a,866d8ecc4e789f7d73d6cafd1b122d1b6032b3b1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[8ceff24a754ac065123ae0ec9f31ec03aff55f8a,871afb43e41ad4e8246438de495a939cd0f8113c)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.18"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.18)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.14,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.4,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-27T17:45:33.034807+00:00", "updated": "2026-08-12T03:15:04.791020+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}