CVE-2023-53748

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2023-53748", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-08T01:18:04.279Z", "datePublished": "2025-12-08T01:19:07.318Z", "dateUpdated": "2026-08-05T09:15:46.862Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T09:15:46.862Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: mediatek: vcodec: Fix potential array out-of-bounds in decoder queue_setup\n\nvariable *nplanes is provided by user via system call argument. The\npossible value of q_data->fmt->num_planes is 1-3, while the value\nof *nplanes can be 1-8. The array access by index i can cause array\nout-of-bounds.\n\nFix this bug by checking *nplanes against the array size."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The bug is reached only through `ioctl(VIDIOC_CREATE_BUFS)` on the MediaTek decoder character device `/dev/videoN`, which requires local system access. There is no network or remote data path into `vb2ops_vdec_queue_setup()`.\nAC:L - Both `*nplanes` (up to VIDEO_MAX_PLANES=8) and every `sizes[i]` come directly from the caller's `v4l2_create_buffers` structure, so the out-of-bounds read is triggered deterministically on the first ioctl with no race, no timing window, and no dependence on memory layout the attacker cannot influence.\nPR:L - No capability check exists anywhere on the path \u2014 only `open()` on the V4L2 decoder node, which is granted to the `video` group on ChromeOS MediaTek devices and to the mediacodec/media domain on Android. A local unprivileged account or a compromised media-codec/GPU sandbox process suffices.\nUI:N - The attacker performs `open()` plus `VIDIOC_CREATE_BUFS` entirely on their own file descriptor. No victim action, no privileged helper, and no pre-existing system state are required.\nS:U - The out-of-bounds access is confined to the kernel's own heap object (`struct mtk_vcodec_ctx`) and the impact stays within the kernel security authority. No hypervisor, IOMMU, or other trust boundary is crossed.\nC:H - The `sizes[i] < q_data->sizeimage[i]` comparison is an attacker-controlled oracle over out-of-bounds memory, letting the `const struct mtk_video_fmt *fmt` kernel-image pointer at offset 48 be recovered bit-by-bit via binary search \u2014 a reliable KASLR/kernel-base disclosure that is the standard enabling primitive for a full local privilege-escalation chain.\nI:N - The loop only reads `q_data->sizeimage[i]`; `sizes[]` is `VB2_MAX_PLANES`-sized and the writing `else` branch is bounded by `fmt->num_planes <= 3`, so there is no out-of-bounds write or other modification of kernel data.\nA:H - The out-of-bounds index into the fixed three-element `sizeimage[]` array is precisely what `CONFIG_UBSAN_BOUNDS` instruments, so on the hardened Android GKI and arm64 configurations where this MediaTek codec driver actually ships, `CONFIG_UBSAN_TRAP` turns each attacker-issued ioctl into a kernel panic."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c"], "versions": [{"version": "590577a4e5257ac3ed72999a94666ad6ba8f24bc", "lessThan": "48e4e06e2c5fe1fda283d499f91492eda2248bb9", "status": "affected", "versionType": "git"}, {"version": "590577a4e5257ac3ed72999a94666ad6ba8f24bc", "lessThan": "b8e19bf3b4aebd855be01b64674187dcf6d1db51", "status": "affected", "versionType": "git"}, {"version": "590577a4e5257ac3ed72999a94666ad6ba8f24bc", "lessThan": "8fbcf730cb89c3647f3365226fe7014118fa93c7", "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/media/platform/mediatek/vcodec/mtk_vcodec_dec.c"], "versions": [{"version": "4.10", "status": "affected"}, {"version": "0", "lessThan": "4.10", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.30", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.3.4", "lessThanOrEqual": "6.3.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.4", "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": "4.10", "versionEndExcluding": "6.1.30"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "6.3.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.10", "versionEndExcluding": "6.4"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/48e4e06e2c5fe1fda283d499f91492eda2248bb9"}, {"url": "https://git.kernel.org/stable/c/b8e19bf3b4aebd855be01b64674187dcf6d1db51"}, {"url": "https://git.kernel.org/stable/c/8fbcf730cb89c3647f3365226fe7014118fa93c7"}], "title": "media: mediatek: vcodec: Fix potential array out-of-bounds in decoder queue_setup", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "48e4e06e2c5fe1fda283d499f91492eda2248bb9", "status": "affected", "version": "590577a4e5257ac3ed72999a94666ad6ba8f24bc", "versionType": "git"}, {"lessThan": "b8e19bf3b4aebd855be01b64674187dcf6d1db51", "status": "affected", "version": "590577a4e5257ac3ed72999a94666ad6ba8f24bc", "versionType": "git"}, {"lessThan": "8fbcf730cb89c3647f3365226fe7014118fa93c7", "status": "affected", "version": "590577a4e5257ac3ed72999a94666ad6ba8f24bc", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "4.10"}, {"lessThan": "4.10", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.30", "versionType": "semver"}, {"lessThanOrEqual": "6.3.*", "status": "unaffected", "version": "6.3.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.4", "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\nmedia: mediatek: vcodec: Fix potential array out-of-bounds in decoder queue_setup\n\nvariable *nplanes is provided by user via system call argument. The\npossible value of q_data->fmt->num_planes is 1-3, while the value\nof *nplanes can be 1-8. The array access by index i can cause array\nout-of-bounds.\n\nFix this bug by checking *nplanes against the array size."}], "id": "CVE-2023-53748", "lastModified": "2026-08-04T10:19:19.703", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2025-12-08T02:15:50.200", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/48e4e06e2c5fe1fda283d499f91492eda2248bb9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8fbcf730cb89c3647f3365226fe7014118fa93c7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b8e19bf3b4aebd855be01b64674187dcf6d1db51"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Deferred"}

{"bugzilla": {"description": "kernel: media: mediatek: vcodec: Fix potential array out-of-bounds in decoder queue_setup", "id": "2419910", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2419910"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2023-53748", "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": "2025-12-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53748\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53748\nhttps://lore.kernel.org/linux-cve-announce/2025120842-CVE-2023-53748-4905@gregkh/T"], "threat_severity": "Moderate"}

{}