CVE-2026-80751

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80751", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.790Z", "datePublished": "2026-09-03T08:26:31.347Z", "dateUpdated": "2026-09-04T04:58:31.507Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-04T04:58:31.507Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npmdomain: mediatek: mfg: initialize prev_o in mtk_mfg_attach_dev()\n\nmtk_mfg_attach_dev() reads prev_o on the first iteration of its loop,\nin \"if (prev_o && prev_o->freq == o->freq)\", before prev_o is assigned\nat the end of the loop body. On that first iteration, evaluating prev_o\nreads an indeterminate value. If it is non-NULL, the condition\ndereferences a stale or invalid pointer, potentially faulting or\nincorrectly skipping the first OPP.\n\nInitialize prev_o to NULL. This matches the intent as well: there is no\nprevious OPP to compare against on the first iteration.\n\nFound with Clang's -Wconditional-uninitialized."}], "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 - mtk_mfg_attach_dev() is only reached from the local kernel genpd attach path (panthor/Mali GPU probe \u2192 devm_pm_domain_attach_list \u2192 genpd_add_device) on MediaTek MT8196/MT6991 SoCs; there is no network, Bluetooth, or USB/physical-bus packet handler into this MFlexGraphics pmdomain code.\nAC:L - On the first loop iteration prev_o is read before assignment; on typical ARM64 kernel stacks the uninitialized slot frequently holds non-zero garbage, so the stale prev_o->freq dereference is reached deterministically during GPU power-domain attach at boot without races or attacker-uncontrollable timing.\nPR:L - The vulnerable path runs automatically when the Mali/panthor GPU binds to the MediaTek MFG genpd during boot on MT8196/MT6991 phones, Chromebooks, and embedded boards; sysfs driver rebind also reaches it with only local administrator access, not init-namespace root beyond ordinary local privilege.\nUI:N - No victim interaction such as opening files, mounting filesystems, or clicking prompts is required; GPU power-domain attachment and OPP registration occur automatically as part of normal platform driver probe during system bring-up.\nS:U - Impact is confined to kernel GPU power-domain and OPP setup on the same host; it does not cross VM, container, IOMMU, or firmware trust boundaries in a way that changes CVSS scope.\nC:H - When the uninitialized prev_o is non-NULL the kernel dereferences a stale stack-derived pointer to read dev_pm_opp_data.freq, exposing contents from an attacker-uncontrolled kernel address; CNA guidance treats invalid-pointer reads as high confidentiality impact.\nI:H - Beyond the stray read, incorrectly skipping the first OPP corrupts the dynamically built GPU dev_pm_opp table used by devfreq and DVFS consumers, constituting kernel memory integrity compromise that can be leveraged for further exploitation on Mali GPU deployments.\nA:H - Dereferencing a stale or invalid prev_o during GPU attach can cause an immediate kernel OOPS/panic, failing Mali/panthor probe and denying GPU availability on affected MediaTek devices until reboot or driver recovery."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/pmdomain/mediatek/mtk-mfg-pmdomain.c"], "versions": [{"version": "f08e7a4e8d6ac4de677727af352ea33c6ce9f444", "lessThan": "de4eec0dfde8c0e27f8915bbb244d17ff68f2fb4", "status": "affected", "versionType": "git"}, {"version": "f08e7a4e8d6ac4de677727af352ea33c6ce9f444", "lessThan": "090a95dbe13df9965279b588d97eda134831769c", "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/pmdomain/mediatek/mtk-mfg-pmdomain.c"], "versions": [{"version": "6.19", "status": "affected"}, {"version": "0", "lessThan": "6.19", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.10", "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": "6.19", "versionEndExcluding": "7.1.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/de4eec0dfde8c0e27f8915bbb244d17ff68f2fb4"}, {"url": "https://git.kernel.org/stable/c/090a95dbe13df9965279b588d97eda134831769c"}], "title": "pmdomain: mediatek: mfg: initialize prev_o in mtk_mfg_attach_dev()", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/pmdomain/mediatek/mtk-mfg-pmdomain.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "de4eec0dfde8c0e27f8915bbb244d17ff68f2fb4", "status": "affected", "version": "f08e7a4e8d6ac4de677727af352ea33c6ce9f444", "versionType": "git"}, {"lessThan": "090a95dbe13df9965279b588d97eda134831769c", "status": "affected", "version": "f08e7a4e8d6ac4de677727af352ea33c6ce9f444", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/pmdomain/mediatek/mtk-mfg-pmdomain.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.19"}, {"lessThan": "6.19", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.10", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npmdomain: mediatek: mfg: initialize prev_o in mtk_mfg_attach_dev()\n\nmtk_mfg_attach_dev() reads prev_o on the first iteration of its loop,\nin \"if (prev_o && prev_o->freq == o->freq)\", before prev_o is assigned\nat the end of the loop body. On that first iteration, evaluating prev_o\nreads an indeterminate value. If it is non-NULL, the condition\ndereferences a stale or invalid pointer, potentially faulting or\nincorrectly skipping the first OPP.\n\nInitialize prev_o to NULL. This matches the intent as well: there is no\nprevious OPP to compare against on the first iteration.\n\nFound with Clang's -Wconditional-uninitialized."}], "id": "CVE-2026-80751", "lastModified": "2026-09-04T05:17:15.100", "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": "2026-09-03T13:06:14.770", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/090a95dbe13df9965279b588d97eda134831769c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/de4eec0dfde8c0e27f8915bbb244d17ff68f2fb4"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f08e7a4e8d6ac4de677727af352ea33c6ce9f444,de4eec0dfde8c0e27f8915bbb244d17ff68f2fb4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f08e7a4e8d6ac4de677727af352ea33c6ce9f444,090a95dbe13df9965279b588d97eda134831769c)"}}], "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": "semver", "value": "6.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,6.19)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.10,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "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": "2026-09-03T13:00:04.830637+00:00", "updated": "2026-09-04T08:00:16.165904+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-457", "CWE-476"]}