CVE-2026-46240 (GCVE-0-2026-46240)
Vulnerability from cvelistv5 – Published: 2026-05-28 09:41 – Updated: 2026-08-05 12:30
VLAI
EPSS
VEX
Title
media: iris: Fix use-after-free in iris_release_internal_buffers()
Summary
In the Linux kernel, the following vulnerability has been resolved:
media: iris: Fix use-after-free in iris_release_internal_buffers()
The recent change in commit 1dabf00ee206 ("media: iris: gen1: Destroy
internal buffers after FW releases") introduced a regression where
session_release_buf() may free the buffer. The caller,
iris_release_internal_buffers(), continued to access `buffer` after the
call, leading to a potential use-after-free.
Fix this by setting BUF_ATTR_PENDING_RELEASE before calling
session_release_buf(), and reverting the flag if the call fails. This
ensures no dereference occurs after potential freeing.
Severity
7.8 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
7cde76db8883ec8a3d1456068079ecadbfb15ca5 , < dd24998a4a4016fb9921916024399bd80f0d45c6
(git)
Affected: 1dabf00ee206eceb0f08a1fe5d1ce635f9064338 , < 18c64439f249859b6140f7bf8bcf95c8ed841f28 (git) Affected: 1dabf00ee206eceb0f08a1fe5d1ce635f9064338 , < f27cfdcfc916bb59297825805f4c3499f89f9e76 (git) Affected: d4457f23ac0130240053a34be663f0fade3bb371 (git) Affected: 6.18.16 , < 6.18.32 (semver) Affected: 6.19.6 , < 6.20 (semver) |
guessed | |
| Linux | Linux |
Affected:
7.0
Unaffected: 0 , < 7.0 (semver) Unaffected: 6.18.32 , ≤ 6.18.* (semver) Unaffected: 7.0.9 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
guessed |
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"value": "AV:L - The vulnerable code is reached only via VIDIOC_STREAMON and related ioctls on the iris V4L2 device node (/dev/videoN); it requires local access to that device, not a network path.\nAC:L - This is a sequential use-after-free, not a race; the attacker drives a decode session and supplies a bitstream with a resolution change to reliably reach the release/free path on gen1 hardware.\nPR:L - Triggering the path needs an open handle to the iris video device (e.g. video-group access, or the codec/media context on Android) but no real root or capability check exists along the path.\nUI:N - The attacker performs all ioctls and supplies the input bitstream directly; no separate victim action is required.\nS:U - The corruption stays within the kernel\u0027s own memory and security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The use-after-free lets the attacker groom and control the contents of the freed struct iris_buffer slot, enabling kernel memory disclosure.\nI:H - The post-free read-modify-write into the freed slab object can corrupt an adjacent reallocated structure, giving a UAF write primitive exploitable for control-flow/data corruption.\nA:H - The use-after-free reliably leads to slab corruption and kernel oops/panic, a high availability impact."
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"title": "media: iris: Fix use-after-free in iris_release_internal_buffers()",
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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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