CVE-2026-89825

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89825", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.768Z", "datePublished": "2026-09-16T10:30:57.497Z", "dateUpdated": "2026-10-19T08:53:19.123Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:53:19.123Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/panthor: fix firmware control interface bounds checks\n\npanthor_init_cs_iface() and panthor_init_csg_iface() validate firmware\ncontrol interface offsets with 32-bit arithmetic and the size of the host\nwrapper structures. The offsets are derived from firmware-provided strides,\nso the arithmetic can wrap before the bounds check, and the host wrapper\nsize is not the size of the firmware control interface being mapped.\n\nUse 64-bit arithmetic for the computed offsets and validate against the\nactual firmware control interface structure sizes with subtraction-based\nbounds checks. Also validate that the shared section is large enough for\nthe global control interface before using it."}], "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 32-bit stride overflow is reached only on the local panthor probe path (panthor_probe \u2192 panthor_device_init \u2192 panthor_fw_init \u2192 panthor_fw_start \u2192 panthor_fw_init_ifaces \u2192 panthor_init_csg_iface/panthor_init_cs_iface) when mapping firmware-provided group_stride/stream_stride from mali_csffw.bin; no network, Bluetooth, or USB handler feeds those fields.\nAC:L - Firmware fully controls group_stride, stream_stride, and group_num (MIN_CSGS is 3, so csg_idx>=1 always runs). A crafted stride that places the u32 offset near 2^32 makes offset+sizeof wrap to a small value and pass the bounds check deterministically, with no race or attacker-uncontrollable timing.\nPR:L - The parser applies no capability check to firmware contents. On Mali CSF Android phones, Chromebooks, and embedded boards, mali_csffw.bin commonly lives on vendor/firmware partitions writable by local non-root system or vendor service accounts, which is sufficient to plant the crafted blob before driver probe.\nUI:N - Once the crafted firmware is in place, panthor_fw_init_ifaces() runs automatically at driver probe and caches the resulting interface pointers; no separate victim action such as opening a file, mounting a filesystem, or using /dev/dri is required to trigger the overflow.\nS:U - The bug corrupts kernel memory past the firmware shared-section vmap and can enable local privilege escalation within the host kernel; it does not cross a VM, IOMMU, or sandbox boundary such as a KVM guest-to-host escape.\nC:H - A wrapped u32 iface_offset near 2^32 yields kmap plus a ~4GiB out-of-bounds control pointer; the kernel then reads panthor_fw_*_control_iface fields (input_va, output_va, stream_num, stream_stride, features) from that address, disclosing kernel memory rather than a few bounded bytes.\nI:H - Those OOB control pointers are cached for the device lifetime and consumed by scheduler, job-IRQ, and GROUP_CREATE paths that write panthor_fw_*_input_iface structures and allocate suspend buffers from control->suspend_size, enabling out-of-bounds kernel writes and control-flow hijacking.\nA:H - Dereferencing kmap plus a wrapped near-4GiB offset can immediately oops or panic if the region is unmapped, and a corrupted firmware interface leaves the Mali GPU unusable; the same path is hit on every probe or firmware boot until the blob is removed."}]}], "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": "33ae55809aee9b4dca1d00cdee35b527f2bf8626", "status": "affected", "versionType": "git"}, {"version": "2718d91816eeed03c09c8abe872e45f59078768c", "lessThan": "80c9528661c774f899281c9a72011208ff39929e", "status": "affected", "versionType": "git"}, {"version": "2718d91816eeed03c09c8abe872e45f59078768c", "lessThan": "3e5c7cddc0073eef6f9bb373189b11a969f1f6f6", "status": "affected", "versionType": "git"}, {"version": "2718d91816eeed03c09c8abe872e45f59078768c", "lessThan": "6a47f9fd2d970674ed9dedc52fc7ab76fd015785", "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": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.51", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.5", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "6.12.110"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.18.51"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "7.2.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/33ae55809aee9b4dca1d00cdee35b527f2bf8626"}, {"url": "https://git.kernel.org/stable/c/80c9528661c774f899281c9a72011208ff39929e"}, {"url": "https://git.kernel.org/stable/c/3e5c7cddc0073eef6f9bb373189b11a969f1f6f6"}, {"url": "https://git.kernel.org/stable/c/6a47f9fd2d970674ed9dedc52fc7ab76fd015785"}], "title": "drm/panthor: fix firmware control interface bounds checks", "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": "33ae55809aee9b4dca1d00cdee35b527f2bf8626", "status": "affected", "version": "2718d91816eeed03c09c8abe872e45f59078768c", "versionType": "git"}, {"lessThan": "80c9528661c774f899281c9a72011208ff39929e", "status": "affected", "version": "2718d91816eeed03c09c8abe872e45f59078768c", "versionType": "git"}, {"lessThan": "3e5c7cddc0073eef6f9bb373189b11a969f1f6f6", "status": "affected", "version": "2718d91816eeed03c09c8abe872e45f59078768c", "versionType": "git"}, {"lessThan": "6a47f9fd2d970674ed9dedc52fc7ab76fd015785", "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": "6.12.110", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.51", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "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: fix firmware control interface bounds checks\n\npanthor_init_cs_iface() and panthor_init_csg_iface() validate firmware\ncontrol interface offsets with 32-bit arithmetic and the size of the host\nwrapper structures. The offsets are derived from firmware-provided strides,\nso the arithmetic can wrap before the bounds check, and the host wrapper\nsize is not the size of the firmware control interface being mapped.\n\nUse 64-bit arithmetic for the computed offsets and validate against the\nactual firmware control interface structure sizes with subtraction-based\nbounds checks. Also validate that the shared section is large enough for\nthe global control interface before using it."}], "id": "CVE-2026-89825", "lastModified": "2026-10-19T09:18:26.457", "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": "2026-09-16T11:16:49.127", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/33ae55809aee9b4dca1d00cdee35b527f2bf8626"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3e5c7cddc0073eef6f9bb373189b11a969f1f6f6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6a47f9fd2d970674ed9dedc52fc7ab76fd015785"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/80c9528661c774f899281c9a72011208ff39929e"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2718d91816eeed03c09c8abe872e45f59078768c,33ae55809aee9b4dca1d00cdee35b527f2bf8626)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2718d91816eeed03c09c8abe872e45f59078768c,80c9528661c774f899281c9a72011208ff39929e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2718d91816eeed03c09c8abe872e45f59078768c,3e5c7cddc0073eef6f9bb373189b11a969f1f6f6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[2718d91816eeed03c09c8abe872e45f59078768c,6a47f9fd2d970674ed9dedc52fc7ab76fd015785)"}}], "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": "semver", "value": "[0,6.10)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.12.110,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[6.18.51,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2.5,7.2.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "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": "2026-09-16T17:45:17.380867+00:00", "updated": "2026-09-18T09:15:06.976181+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-190", "CWE-20"]}