CVE-2026-68229 (GCVE-0-2026-68229)
Vulnerability from cvelistv5 – Published: 2026-08-10 12:00 – Updated: 2026-08-19 16:32
VLAI
EPSS
VEX
Title
media: cedrus: skip invalid H.264 reference list entries
Summary
In the Linux kernel, the following vulnerability has been resolved:
media: cedrus: skip invalid H.264 reference list entries
Cedrus consumes H.264 ref_pic_list0/ref_pic_list1 entries from the
stateless slice control and later uses their indices to look up
decode->dpb[] in _cedrus_write_ref_list().
Rejecting such controls in cedrus_try_ctrl() would break existing
userspace, since stateless H.264 reference lists may legitimately carry
out-of-range indices for missing references. Instead, guard the actual
DPB lookup in Cedrus and skip entries whose indices do not fit the fixed
V4L2_H264_NUM_DPB_ENTRIES array.
This keeps the fix local to the driver use site and avoids out-of-bounds
reads from malformed or unsupported reference list entries.
Severity
7.1 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
e000e1fa4bdbd783149e7f97cf3be61e1c0bab8c , < a6a109771c51920beb620f30778c29da823cc34c
(git)
Affected: e000e1fa4bdbd783149e7f97cf3be61e1c0bab8c , < 7ff6f728a2433b420bb372cb0e8a4eea3f2e1a4b (git) Affected: e000e1fa4bdbd783149e7f97cf3be61e1c0bab8c , < 1db34683b0fbbcb3bc162380c11514ea0a44e8ab (git) Affected: e000e1fa4bdbd783149e7f97cf3be61e1c0bab8c , < 2ee8327c85b3ac7b532d2d6a1e3a295d5ad7414a (git) Affected: e000e1fa4bdbd783149e7f97cf3be61e1c0bab8c , < 0af8945fcae742d099f59f3c725eb67235953a31 (git) Affected: e000e1fa4bdbd783149e7f97cf3be61e1c0bab8c , < 9924cb548ee7753a6473997949c3ec48092de0b0 (git) Affected: e000e1fa4bdbd783149e7f97cf3be61e1c0bab8c , < e53112c2de88982e66c369aee2120d5efd78df30 (git) Affected: e000e1fa4bdbd783149e7f97cf3be61e1c0bab8c , < 10358ea986c3c85516d1c8206486464f79d36e76 (git) |
guessed | |
| Linux | Linux |
Affected:
5.10
Unaffected: 0 , < 5.10 (semver) Unaffected: 5.10.265 , ≤ 5.10.* (semver) Unaffected: 5.15.216 , ≤ 5.15.* (semver) Unaffected: 6.1.183 , ≤ 6.1.* (semver) Unaffected: 6.6.148 , ≤ 6.6.* (semver) Unaffected: 6.12.101 , ≤ 6.12.* (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
guessed |
{
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"product": "Linux",
"programFiles": [
"drivers/staging/media/sunxi/cedrus/cedrus_h264.c"
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{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: cedrus: skip invalid H.264 reference list entries\n\nCedrus consumes H.264 ref_pic_list0/ref_pic_list1 entries from the\nstateless slice control and later uses their indices to look up\ndecode-\u003edpb[] in _cedrus_write_ref_list().\n\nRejecting such controls in cedrus_try_ctrl() would break existing\nuserspace, since stateless H.264 reference lists may legitimately carry\nout-of-range indices for missing references. Instead, guard the actual\nDPB lookup in Cedrus and skip entries whose indices do not fit the fixed\nV4L2_H264_NUM_DPB_ENTRIES array.\n\nThis keeps the fix local to the driver use site and avoids out-of-bounds\nreads from malformed or unsupported reference list entries."
}
],
"metrics": [
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"baseSeverity": "HIGH",
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"version": "3.1"
},
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{
"lang": "en",
"value": "AV:L - The bug is reached only through the local V4L2 interface on the cedrus video device node (/dev/videoN) via VIDIOC_S_EXT_CTRLS plus QBUF/STREAMON ioctls. There is no remote or network-facing path to the stateless H.264 decoder.\nAC:L - The attacker fully and deterministically controls the out-of-range value: ref_pic_list0/1[i].index is a u8 copied verbatim from the control payload with no validation, so any index in 16..255 immediately produces the out-of-bounds dpb[] access on the next decode run. No race, timing, or uncontrollable memory-layout condition is involved.\nPR:L - Only an unprivileged local account with access to the cedrus video device node is needed (typically the \u0027video\u0027 group, or the media/camera service on Android and embedded Allwinner devices). No capability, CAP_SYS_ADMIN, or root check exists anywhere on the path \u2014 cedrus_try_ctrl() validates only SPS chroma format and bit depth.\nUI:N - The attacking process performs the entire sequence itself \u2014 open the device, set the crafted H.264 slice-params control, queue buffers, start streaming. No victim action, file open, or media mount is required.\nS:U - The out-of-bounds read stays within the kernel\u0027s own memory and security authority; no VM, IOMMU, or sandbox boundary is crossed. This is a standard in-kernel driver memory-safety defect.\nC:H - decode-\u003edpb[] holds 16 32-byte entries at the start of a ~560-byte control allocation, so an attacker-chosen index up to 255 reads at offset 8160 \u2014 about 7.6 KB of adjacent kernel heap beyond the object. The read flags/reference_ts values are consumed by the ACTIVE test and vb2_find_buffer() timestamp lookup, giving an attacker-steerable oracle over unrelated kernel heap contents.\nI:N - The defect is purely a read: num_ref is bounded to V4L2_H264_REF_LIST_LEN by v4l2-ctrls-core.c, so the sram_array[CEDRUS_MAX_REF_IDX] stores stay in bounds, and only a legitimately-looked-up buffer position is written to hardware SRAM. No kernel memory is modified out of bounds.\nA:H - Reading several kilobytes past the end of a slab object can walk off the slab page into an unmapped or poisoned region, and trips KASAN/hardening checks, producing a kernel oops. The trigger is trivially repeatable from an unprivileged process, so the crash can be induced at will."
}
]
}
],
"providerMetadata": {
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{
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"datePublished": "2026-08-10T12:00:51.935Z",
"dateReserved": "2026-07-30T09:28:09.376Z",
"dateUpdated": "2026-08-19T16:32:01.546Z",
"state": "PUBLISHED"
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"date": "2026-10-09",
"epss": "0.00167",
"percentile": "0.05414"
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"nvd": {
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}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: cedrus: skip invalid H.264 reference list entries\n\nCedrus consumes H.264 ref_pic_list0/ref_pic_list1 entries from the\nstateless slice control and later uses their indices to look up\ndecode-\u003edpb[] in _cedrus_write_ref_list().\n\nRejecting such controls in cedrus_try_ctrl() would break existing\nuserspace, since stateless H.264 reference lists may legitimately carry\nout-of-range indices for missing references. Instead, guard the actual\nDPB lookup in Cedrus and skip entries whose indices do not fit the fixed\nV4L2_H264_NUM_DPB_ENTRIES array.\n\nThis keeps the fix local to the driver use site and avoids out-of-bounds\nreads from malformed or unsupported reference list entries."
}
],
"id": "CVE-2026-68229",
"lastModified": "2026-08-19T17:20:38.647",
"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": "2026-08-10T13:20:11.123",
"references": [
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"url": "https://git.kernel.org/stable/c/0af8945fcae742d099f59f3c725eb67235953a31"
},
{
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"url": "https://git.kernel.org/stable/c/10358ea986c3c85516d1c8206486464f79d36e76"
},
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},
{
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"url": "https://git.kernel.org/stable/c/2ee8327c85b3ac7b532d2d6a1e3a295d5ad7414a"
},
{
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"url": "https://git.kernel.org/stable/c/7ff6f728a2433b420bb372cb0e8a4eea3f2e1a4b"
},
{
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},
{
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"url": "https://git.kernel.org/stable/c/a6a109771c51920beb620f30778c29da823cc34c"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/e53112c2de88982e66c369aee2120d5efd78df30"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-08-31T11:19:19+00:00",
"cve": "CVE-2026-68229",
"id": "CVE-2026-68229",
"initial_release_date": "2026-08-10T00:00:00+00:00",
"product_status:known_not_affected": "277",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: media: cedrus: skip invalid H.264 reference list entries",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68229.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-10-03T00:36:40Z",
"cve": "CVE-2026-68229",
"id": "CVE-2026-68229",
"initial_release_date": "2026-08-21T00:44:46Z",
"product_status:known_affected": "597",
"product_status:known_not_affected": "153",
"product_status:recommended": "252",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-68229",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68229.json",
"version": "10"
}
}
}
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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 |
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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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