CVE-2026-74452

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-74452", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.899Z", "datePublished": "2026-08-15T12:26:56.331Z", "dateUpdated": "2026-08-17T05:47:23.139Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:47:23.139Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/panthor: reject firmware sections with oversized data\n\nIn panthor_fw_load_section_entry(), the data size to copy is calculated\nwithout validating it against the allocated section_size:\n\n section->data.size = hdr.data.end - hdr.data.start;\n\nIf a crafted firmware sets data.size larger than the allocated memory,\nthis could cause a heap buffer overflow in panthor_fw_init_section_mem()\n\n memcpy(section->mem->kmap, section->data.buf, section->data.size);\n\nAdditionally, if the section->data.size exceeds the BO size, could this\nmemset underflow the size calculation, leading to a massive out-of-bounds\nzeroing of kernel memory?\n\n memset(section->mem->kmap + section->data.size, 0,\n panthor_kernel_bo_size(section->mem) - section->data.size);\n\nReject section entries whose initial data is larger than the section size."}], "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 overflow is reached only when panthor_fw_load() parses mali_csffw.bin from the local firmware search path during platform probe (panthor_probe\u2192panthor_fw_init\u2192panthor_fw_load_section_entry\u2192panthor_fw_init_section_mem); no network, DRM ioctl, or /dev/dri/renderD* path feeds attacker-controlled firmware headers.\nAC:L - An attacker fully controls firmware section header fields (data.start/end versus va.start/end); once a malicious blob is in the firmware path, parsing deterministically performs an oversized memcpy and, with ZERO set, an underflowed memset on every load and on GPU-reset reloads without races or uncontrollable layout.\nPR:L - The parser performs no capability or authentication checks on firmware content; on Mali CSF Android, Chromebook, and embedded deployments the GPU firmware image commonly lives on vendor/firmware partitions writable by local non-root system or vendor service accounts, sufficient to plant the crafted blob before driver probe.\nUI:N - After the malicious firmware file is in place, parsing runs automatically at driver probe or GPU-reset section reload with no separate victim action; an attacker does not need another user to open a device node or mount a filesystem to trigger the bug.\nS:U - Impact is kernel heap corruption and potential local privilege escalation within the same kernel security domain; it does not cross a VM, IOMMU, or sandbox boundary such as guest-to-host escape.\nC:H - The unchecked memcpy copies attacker-controlled firmware bytes past the allocated shmem BO mapping, and the memset length underflow can zero far beyond the buffer, giving out-of-bounds read/write primitives over adjacent kernel heap objects rather than a bounded leak.\nI:H - Heap buffer overflow plus attacker-controlled firmware content enables arbitrary kernel memory corruption; the ZERO-flag memset underflow can perform a massive out-of-bounds zero write exploitable for control-flow hijacking and local privilege escalation.\nA:H - Oversized memcpy and underflowed memset corrupt kernel heap memory and can immediately kernel oops or panic; the same corruption is re-triggered on GPU reset via panthor_reload_fw_sections(), enabling repeatable denial of service."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/gpu/drm/panthor/panthor_fw.c"], "versions": [{"version": "2718d91816eeed03c09c8abe872e45f59078768c", "lessThan": "0e57165ca025a67d8dfd17efd2765fdd4925fdab", "status": "affected", "versionType": "git"}, {"version": "2718d91816eeed03c09c8abe872e45f59078768c", "lessThan": "2a761b9be5863e1d26a584f0c2d1e114a684ed9a", "status": "affected", "versionType": "git"}, {"version": "2718d91816eeed03c09c8abe872e45f59078768c", "lessThan": "7f4674d986c15c74327cb6ac6e2e2afecf061e04", "status": "affected", "versionType": "git"}, {"version": "2718d91816eeed03c09c8abe872e45f59078768c", "lessThan": "a3caaa06809248b996254be5b47e10804a3494e2", "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/gpu/drm/panthor/panthor_fw.c"], "versions": [{"version": "6.10", "status": "affected"}, {"version": "0", "lessThan": "6.10", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.103", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.44", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.8", "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": "6.10", "versionEndExcluding": "6.12.103"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.18.44"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "7.1.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/0e57165ca025a67d8dfd17efd2765fdd4925fdab"}, {"url": "https://git.kernel.org/stable/c/2a761b9be5863e1d26a584f0c2d1e114a684ed9a"}, {"url": "https://git.kernel.org/stable/c/7f4674d986c15c74327cb6ac6e2e2afecf061e04"}, {"url": "https://git.kernel.org/stable/c/a3caaa06809248b996254be5b47e10804a3494e2"}], "title": "drm/panthor: reject firmware sections with oversized data", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/gpu/drm/panthor/panthor_fw.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "0e57165ca025a67d8dfd17efd2765fdd4925fdab", "status": "affected", "version": "2718d91816eeed03c09c8abe872e45f59078768c", "versionType": "git"}, {"lessThan": "2a761b9be5863e1d26a584f0c2d1e114a684ed9a", "status": "affected", "version": "2718d91816eeed03c09c8abe872e45f59078768c", "versionType": "git"}, {"lessThan": "7f4674d986c15c74327cb6ac6e2e2afecf061e04", "status": "affected", "version": "2718d91816eeed03c09c8abe872e45f59078768c", "versionType": "git"}, {"lessThan": "a3caaa06809248b996254be5b47e10804a3494e2", "status": "affected", "version": "2718d91816eeed03c09c8abe872e45f59078768c", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/gpu/drm/panthor/panthor_fw.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.10"}, {"lessThan": "6.10", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.103", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.44", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.8", "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\ndrm/panthor: reject firmware sections with oversized data\n\nIn panthor_fw_load_section_entry(), the data size to copy is calculated\nwithout validating it against the allocated section_size:\n\n section->data.size = hdr.data.end - hdr.data.start;\n\nIf a crafted firmware sets data.size larger than the allocated memory,\nthis could cause a heap buffer overflow in panthor_fw_init_section_mem()\n\n memcpy(section->mem->kmap, section->data.buf, section->data.size);\n\nAdditionally, if the section->data.size exceeds the BO size, could this\nmemset underflow the size calculation, leading to a massive out-of-bounds\nzeroing of kernel memory?\n\n memset(section->mem->kmap + section->data.size, 0,\n panthor_kernel_bo_size(section->mem) - section->data.size);\n\nReject section entries whose initial data is larger than the section size."}], "id": "CVE-2026-74452", "lastModified": "2026-08-17T06:19:41.070", "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": "2026-08-15T13:17:49.790", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0e57165ca025a67d8dfd17efd2765fdd4925fdab"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2a761b9be5863e1d26a584f0c2d1e114a684ed9a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7f4674d986c15c74327cb6ac6e2e2afecf061e04"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a3caaa06809248b996254be5b47e10804a3494e2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: drm/panthor: reject firmware sections with oversized data", "id": "2516972", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2516972"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-120", "details": ["In the Linux kernel, the following vulnerability has been resolved:\ndrm/panthor: reject firmware sections with oversized data\nIn panthor_fw_load_section_entry(), the data size to copy is calculated\nwithout validating it against the allocated section_size:\nsection->data.size = hdr.data.end - hdr.data.start;\nIf a crafted firmware sets data.size larger than the allocated memory,\nthis could cause a heap buffer overflow in panthor_fw_init_section_mem()\nmemcpy(section->mem->kmap, section->data.buf, section->data.size);\nAdditionally, if the section->data.size exceeds the BO size, could this\nmemset underflow the size calculation, leading to a massive out-of-bounds\nzeroing of kernel memory?\nmemset(section->mem->kmap + section->data.size, 0,\npanthor_kernel_bo_size(section->mem) - section->data.size);\nReject section entries whose initial data is larger than the section size.", "A flaw was found in the Linux kernel's drm/panthor component. This vulnerability allows a local attacker, by providing a specially crafted firmware, to cause a heap buffer overflow. This occurs because the data size to copy is not validated against the allocated section size, potentially leading to a massive out-of-bounds write in kernel memory. The most significant consequence is a denial of service, but it could potentially lead to further system compromise."], "name": "CVE-2026-74452", "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": "2026-08-15T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-74452\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-74452\nhttps://lore.kernel.org/linux-cve-announce/2026081531-CVE-2026-74452-445f@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2718d91816eeed03c09c8abe872e45f59078768c,0e57165ca025a67d8dfd17efd2765fdd4925fdab)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2718d91816eeed03c09c8abe872e45f59078768c,2a761b9be5863e1d26a584f0c2d1e114a684ed9a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2718d91816eeed03c09c8abe872e45f59078768c,7f4674d986c15c74327cb6ac6e2e2afecf061e04)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2718d91816eeed03c09c8abe872e45f59078768c,a3caaa06809248b996254be5b47e10804a3494e2)"}}], "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": "6.10"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.10)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.103,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.44,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1.8,7.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc6,*]"}}], "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": "2026-08-15T13:45:03.195368+00:00", "updated": "2026-08-21T21:30:17.769187+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-120"]}