CVE-2026-43256 (GCVE-0-2026-43256)
Vulnerability from cvelistv5 – Published: 2026-05-06 11:28 – Updated: 2026-08-05 12:26
VLAI
EPSS
VEX
Title
media: qcom: camss: vfe: Fix out-of-bounds access in vfe_isr_reg_update()
Summary
In the Linux kernel, the following vulnerability has been resolved:
media: qcom: camss: vfe: Fix out-of-bounds access in vfe_isr_reg_update()
vfe_isr() iterates using MSM_VFE_IMAGE_MASTERS_NUM(7) as the loop
bound and passes the index to vfe_isr_reg_update(). However,
vfe->line[] array is defined with VFE_LINE_NUM_MAX(4):
struct vfe_line line[VFE_LINE_NUM_MAX];
When index is 4, 5, 6, the access to vfe->line[line_id] exceeds
the array bounds and resulting in out-of-bounds memory access.
Fix this by using separate loops for output lines and write masters.
Severity
7.8 (High)
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
4edc8eae715cecf5f8bf12a0c77c281f336c37db , < e6cbf765686fb6c1d8f2530b3daf6c66efc92f5d
(git)
Affected: 4edc8eae715cecf5f8bf12a0c77c281f336c37db , < 0c074e80921fd18984b75836730d76c768c84f65 (git) Affected: 4edc8eae715cecf5f8bf12a0c77c281f336c37db , < 1b103307df6d461a0731be25aca69ad0335b0933 (git) Affected: 4edc8eae715cecf5f8bf12a0c77c281f336c37db , < fade67c88870f497a13ed450ba01f7236c92dd9b (git) Affected: 4edc8eae715cecf5f8bf12a0c77c281f336c37db , < e7a38ecda2498e7ce998793ac2a46ca47317635d (git) Affected: 4edc8eae715cecf5f8bf12a0c77c281f336c37db , < d965919af524e68cb2ab1a685872050ad2ee933d (git) |
guessed | |
| Linux | Linux |
Affected:
5.18
Unaffected: 0 , < 5.18 (semver) Unaffected: 6.1.167 , ≤ 6.1.* (semver) Unaffected: 6.6.128 , ≤ 6.6.* (semver) Unaffected: 6.12.75 , ≤ 6.12.* (semver) Unaffected: 6.18.16 , ≤ 6.18.* (semver) Unaffected: 6.19.6 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix) |
guessed |
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"value": "AV:L - The vulnerable path is reached through local V4L2/media device use, where a process starts CAMSS camera streaming and the hardware interrupt enters vfe_isr(). It is not directly network-facing and does not require physical hotplug beyond the affected built-in camera hardware.\nAC:L - On SM8250 VFE-lite, ordinary bus completion bits overlap the erroneous RDI_RUP checks for indices 4-6, so normal streaming interrupts can pass out-of-bounds line IDs. No race or condition outside the attacker\u0027s control is required once streaming is active.\nPR:L - The driver has no capable() or administrator-only check on this path; access is governed by V4L2 device-node or camera-service permissions. This is basic local privilege, not real root in the init namespace.\nUI:N - A malicious local process with access to the camera device can configure buffers and start streaming itself. No separate victim action is required.\nS:U - The impact remains within the kernel/CAMSS security authority. There is no guest-to-host, IOMMU, or other cross-scope boundary bypass.\nC:H - The bug performs out-of-bounds reads from kernel memory beyond vfe-\u003eline[]. Because this is repeatable kernel memory corruption, high confidentiality impact is defensible.\nI:H - If the out-of-bounds wait_reg_update field is nonzero, the ISR writes to out-of-bounds memory and calls complete() on an out-of-bounds completion object. This can corrupt adjacent kernel objects, so integrity impact is high.\nA:H - The out-of-bounds access and possible complete() on invalid memory occur in interrupt context and can cause an oops or panic. The trigger can be repeated by restarting or continuing camera streaming."
}
]
}
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{
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"cve": "CVE-2026-43256",
"id": "CVE-2026-43256",
"initial_release_date": "2026-05-06T00:00:00+00:00",
"product_status:known_not_affected": "274",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: media: qcom: camss: vfe: Fix out-of-bounds access in vfe_isr_reg_update()",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43256.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "important",
"current_release_date": "2026-08-31T17:07:06Z",
"cve": "CVE-2026-43256",
"id": "CVE-2026-43256",
"initial_release_date": "2026-05-09T02:40:10Z",
"product_status:first_fixed": "2",
"product_status:known_affected": "424",
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"product_status:recommended": "250",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-43256",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-43256.json",
"version": "8"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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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
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