CVE-2026-63843 (GCVE-0-2026-63843)
Vulnerability from cvelistv5 – Published: 2026-07-19 14:04 – Updated: 2026-08-05 12:36
VLAI
EPSS
VEX
Title
drm/amdgpu/jpeg: set no_user_fence for JPEG v4.0.5 ring
Summary
In the Linux kernel, the following vulnerability has been resolved:
drm/amdgpu/jpeg: set no_user_fence for JPEG v4.0.5 ring
JPEG rings do not support 64-bit user fence writes, reject CS
submissions with user fences.
(cherry picked from commit f05d0a4f21fc720116d6e238f23308b199891058)
Severity
7.8 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
8f98a715da8e906cff5c635f9eb5399b84751557 , < 424510b60d4698a75a6ff71acdd88b528f0f39af
(git)
Affected: 8f98a715da8e906cff5c635f9eb5399b84751557 , < f26e3f7186cd6ecc93e6af102744d64c798dea7e (git) Affected: 8f98a715da8e906cff5c635f9eb5399b84751557 , < f9bc5633b761cff200c428f61ed0df6212b1c721 (git) Affected: 8f98a715da8e906cff5c635f9eb5399b84751557 , < b65b7f3f3c18f797f81a2af7c97e2079900ad6db (git) |
guessed | |
| Linux | Linux |
Affected:
6.7
Unaffected: 0 , < 6.7 (semver) Unaffected: 6.12.91 , ≤ 6.12.* (semver) Unaffected: 6.18.33 , ≤ 6.18.* (semver) Unaffected: 7.0.10 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"cna": {
"affected": [
{
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"product": "Linux",
"programFiles": [
"drivers/gpu/drm/amd/amdgpu/jpeg_v4_0_5.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"status": "affected",
"version": "8f98a715da8e906cff5c635f9eb5399b84751557",
"versionType": "git"
},
{
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{
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"version": "8f98a715da8e906cff5c635f9eb5399b84751557",
"versionType": "git"
},
{
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"status": "affected",
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"versionType": "git"
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{
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"product": "Linux",
"programFiles": [
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],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.7"
},
{
"lessThan": "6.7",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.12.91",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.18.33",
"versionType": "semver"
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{
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"status": "unaffected",
"version": "7.0.10",
"versionType": "semver"
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{
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"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix"
}
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],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.91",
"versionStartIncluding": "6.7",
"vulnerable": true
},
{
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{
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"versionStartIncluding": "6.7",
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{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1",
"versionStartIncluding": "6.7",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
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],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/jpeg: set no_user_fence for JPEG v4.0.5 ring\n\nJPEG rings do not support 64-bit user fence writes, reject CS\nsubmissions with user fences.\n\n(cherry picked from commit f05d0a4f21fc720116d6e238f23308b199891058)"
}
],
"metrics": [
{
"cvssV3_1": {
"baseScore": 7.8,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - Exploitation requires submitting DRM_IOCTL_AMDGPU_CS on a local /dev/dri/renderD* device node; the vulnerable JPEG ring path is only reachable through this local ioctl interface, not over the network.\nAC:L - An attacker with render-node access can reliably craft an AMDGPU_CS submission with a FENCE chunk targeting the JPEG ring (ip_type=AMDGPU_HW_IP_VCN_JPEG) on VCN 4.0.5 hardware without races or conditions outside their control.\nPR:L - DRM_IOCTL_AMDGPU_CS is gated by DRM_AUTH|DRM_RENDER_ALLOW, requiring only unprivileged local access to a render node (typical for users in the render/video group, browser GPU processes, or cloud GPU tenants), not root in the init namespace.\nUI:N - No victim interaction is required once the attacker has render-node access; exploitation is achieved entirely through crafted ioctl submissions.\nS:U - Impact is confined to the kernel/GPU driver security domain of the compromised context; this is a standard local GPU driver memory-corruption issue, not a VM escape or cross-security-authority boundary bypass.\nC:H - The unsupported 64-bit user fence path causes the JPEG engine to perform a GPU-initiated memory write to attacker-chosen GPU virtual addresses, providing a memory-corruption primitive that can be leveraged for arbitrary kernel memory disclosure in exploit chains.\nI:H - The malformed fence write is a GPU-driven arbitrary memory write to attacker-controlled GPU VA mappings (including GTT-backed system memory), constituting a memory corruption primitive exploitable for code execution or privilege escalation.\nA:H - Triggering unsupported fence operations on the JPEG engine can cause GPU hangs, engine resets, or kernel warnings/oops, resulting in denial of service affecting system availability."
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-05T12:36:20.909Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/424510b60d4698a75a6ff71acdd88b528f0f39af"
},
{
"url": "https://git.kernel.org/stable/c/f26e3f7186cd6ecc93e6af102744d64c798dea7e"
},
{
"url": "https://git.kernel.org/stable/c/f9bc5633b761cff200c428f61ed0df6212b1c721"
},
{
"url": "https://git.kernel.org/stable/c/b65b7f3f3c18f797f81a2af7c97e2079900ad6db"
}
],
"title": "drm/amdgpu/jpeg: set no_user_fence for JPEG v4.0.5 ring",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
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"assignerShortName": "Linux",
"cveId": "CVE-2026-63843",
"datePublished": "2026-07-19T14:04:37.815Z",
"dateReserved": "2026-07-19T07:54:57.015Z",
"dateUpdated": "2026-08-05T12:36:20.909Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
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"date": "2026-09-30",
"epss": "0.00175",
"percentile": "0.06313"
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"nvd": {
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"drivers/gpu/drm/amd/amdgpu/jpeg_v4_0_5.c"
],
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"vendor": "Linux",
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"vendor": "Linux",
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"version": "0",
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"version": "6.12.91",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.18.33",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "7.0.10",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.1",
"versionType": "original_commit_for_fix"
}
]
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],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/jpeg: set no_user_fence for JPEG v4.0.5 ring\n\nJPEG rings do not support 64-bit user fence writes, reject CS\nsubmissions with user fences.\n\n(cherry picked from commit f05d0a4f21fc720116d6e238f23308b199891058)"
}
],
"id": "CVE-2026-63843",
"lastModified": "2026-07-27T17:44:23.777",
"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": "2026-07-19T15:16:51.093",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/424510b60d4698a75a6ff71acdd88b528f0f39af"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/b65b7f3f3c18f797f81a2af7c97e2079900ad6db"
},
{
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"url": "https://git.kernel.org/stable/c/f9bc5633b761cff200c428f61ed0df6212b1c721"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Awaiting Analysis"
}
},
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-07-31T19:03:52+00:00",
"cve": "CVE-2026-63843",
"id": "CVE-2026-63843",
"initial_release_date": "2026-07-19T00:00:00+00:00",
"product_status:known_affected": "198",
"product_status:known_not_affected": "76",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: drm/amdgpu/jpeg: set no_user_fence for JPEG v4.0.5 ring",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-63843.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-18T00:47:46Z",
"cve": "CVE-2026-63843",
"id": "CVE-2026-63843",
"initial_release_date": "2026-07-24T02:13:57Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "424",
"product_status:known_not_affected": "287",
"product_status:recommended": "250",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-63843",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-63843.json",
"version": "9"
}
}
}
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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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