CVE-2023-53748 (GCVE-0-2023-53748)
Vulnerability from cvelistv5 – Published: 2025-12-08 01:19 – Updated: 2026-08-05 09:15
VLAI
EPSS
VEX
Title
media: mediatek: vcodec: Fix potential array out-of-bounds in decoder queue_setup
Summary
In the Linux kernel, the following vulnerability has been resolved:
media: mediatek: vcodec: Fix potential array out-of-bounds in decoder queue_setup
variable *nplanes is provided by user via system call argument. The
possible value of q_data->fmt->num_planes is 1-3, while the value
of *nplanes can be 1-8. The array access by index i can cause array
out-of-bounds.
Fix this bug by checking *nplanes against the array size.
Severity
7.1 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
590577a4e5257ac3ed72999a94666ad6ba8f24bc , < 48e4e06e2c5fe1fda283d499f91492eda2248bb9
(git)
Affected: 590577a4e5257ac3ed72999a94666ad6ba8f24bc , < b8e19bf3b4aebd855be01b64674187dcf6d1db51 (git) Affected: 590577a4e5257ac3ed72999a94666ad6ba8f24bc , < 8fbcf730cb89c3647f3365226fe7014118fa93c7 (git) |
guessed | |
| Linux | Linux |
Affected:
4.10
Unaffected: 0 , < 4.10 (semver) Unaffected: 6.1.30 , ≤ 6.1.* (semver) Unaffected: 6.3.4 , ≤ 6.3.* (semver) Unaffected: 6.4 , ≤ * (original_commit_for_fix) |
guessed |
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"programFiles": [
"drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec.c"
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"version": "0",
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"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-\u003efmt-\u003enum_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."
}
],
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"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
"version": "3.1"
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{
"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\u0027s `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\u0027s 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] \u003c q_data-\u003esizeimage[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-\u003esizeimage[i]`; `sizes[]` is `VB2_MAX_PLANES`-sized and the writing `else` branch is bounded by `fmt-\u003enum_planes \u003c= 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."
}
]
}
],
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},
{
"url": "https://git.kernel.org/stable/c/b8e19bf3b4aebd855be01b64674187dcf6d1db51"
},
{
"url": "https://git.kernel.org/stable/c/8fbcf730cb89c3647f3365226fe7014118fa93c7"
}
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"title": "media: mediatek: vcodec: Fix potential array out-of-bounds in decoder queue_setup",
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"cveId": "CVE-2023-53748",
"datePublished": "2025-12-08T01:19:07.318Z",
"dateReserved": "2025-12-08T01:18:04.279Z",
"dateUpdated": "2026-08-05T09:15:46.862Z",
"state": "PUBLISHED"
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"date": "2026-09-27",
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}
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}
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"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-\u003efmt-\u003enum_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": {
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{
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"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",
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"published": "2025-12-08T02:15:50.200",
"references": [
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"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/48e4e06e2c5fe1fda283d499f91492eda2248bb9"
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"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Deferred"
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"cve": "CVE-2023-53748",
"id": "CVE-2023-53748",
"initial_release_date": "2023-01-01T00:00:00+00:00",
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"source": "Red Hat CSAF VEX",
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"title": "kernel: media: mediatek: vcodec: Fix potential array out-of-bounds in decoder queue_setup",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53748.json",
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"cve": "CVE-2023-53748",
"id": "CVE-2023-53748",
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"title": "SUSE CVE CVE-2023-53748",
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}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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