usb: gadget: uvc: clamp SEND_RESPONSE length to the response buffer
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: uvc: clamp SEND_RESPONSE length to the response buffer uvc_send_response() builds the UVC control response from a user-supplied struct uvc_request_data: req->length = min_t(unsigned int, uvc->event_length, data->length); ... memcpy(req->buf, data->data, req->length); req->length is clamped to uvc->event_length, which is taken from the host control request wLength (up to UVC_MAX_REQUEST_SIZE, 64), and to data->length, which comes from the UVCIOC_SEND_RESPONSE ioctl and is only checked for being negative. The source buffer data->data is only 60 bytes, so a response with uvc->event_length and data->length both greater than 60 makes memcpy() read past the end of data->data. Clamp req->length to sizeof(data->data) as well.
- Published
- Aug 10, 2026
- Updated
- Aug 19, 2026
- EPSS
- 0.2% · 11th percentile
- CWE
- —
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Report tools
Action score
0
Monitor
Low priority for now.
- CVSS
- 0 / 40 · —
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
Noroxi analysis
No Noroxi analysis for this record yet
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We use this product, ask for helpAffected systems
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Versions reported by the vendor
Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.
Linux Linux
- 3.10affected
- a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1 and later · before eaf783c005299a702f2cc96b08cd21ede081f098affected · git
- a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1 and later · before 568e68d8f80395a64848aa2946af8ade72da0ffbaffected · git
- a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1 and later · before 82ec2c1e456b17451f0736c3983402642f961733affected · git
- a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1 and later · before 4e116372b7a4f87df0dc0ed4b0ab5b0bb0cc5796affected · git
- a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1 and later · before 662f6c6c6ff8a6c508e1646c09cae74e28f3cca6affected · git
- a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1 and later · before 1f03658f3e9b2f8fd1d1003ba389a0390b49a350affected · git
- a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1 and later · before c8510fbbea09ef0170b56b14dc2b5890dc75be07affected · git
- a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1 and later · before b70dc75e85ba968b7b76eebfe5d63000080b875baffected · git
- before 3.10not affected · semver
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | linux | before 6.1.187-1 | 6.1.187-1 |
| Debian:12 | linux-6.12 | before 6.12.101-1~deb12u1 | 6.12.101-1~deb12u1 |
| Debian:13 | linux | before 6.12.101-1 | 6.12.101-1 |
| Debian:14 | linux | before 7.1.6-1 | 7.1.6-1 |
Same product
linux: all recordsOther highest-scoring records for the same primary product.
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- CVE-2026-74280crypto: marvell/octeontx - fix DMA cleanup using wrong loop index40Plan
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Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| Linux Linux | 1f03658f3e9b2f8fd1d1003ba389a0390b49a350 | Vendor (CNA) |
| Linux Linux | 4e116372b7a4f87df0dc0ed4b0ab5b0bb0cc5796 | Vendor (CNA) |
| Linux Linux | 568e68d8f80395a64848aa2946af8ade72da0ffb | Vendor (CNA) |
| Linux Linux | 662f6c6c6ff8a6c508e1646c09cae74e28f3cca6 | Vendor (CNA) |
| Linux Linux | 82ec2c1e456b17451f0736c3983402642f961733 | Vendor (CNA) |
| Linux Linux | b70dc75e85ba968b7b76eebfe5d63000080b875b | Vendor (CNA) |
| Linux Linux | c8510fbbea09ef0170b56b14dc2b5890dc75be07 | Vendor (CNA) |
| Linux Linux | eaf783c005299a702f2cc96b08cd21ede081f098 | Vendor (CNA) |
| azl3 kernel 6.6.143.1-1 on Azure Linux 3.0 | 6.6.150.1-1 · CBL-Mariner Releases | Microsoft (MSRC) |
| debian:linux | 6.1.187-1 · Debian:12 | Package registry (OSV) |
| debian:linux-6.12 | 6.12.101-1~deb12u1 · Debian:12 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
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Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-26-0800 · Aug 11, 2026(Linux Kernel Güvenlik Bildirimi)
Technical details
No CVSS vector for this record, so attack conditions can't be derived.
Weakness class (CWE)
—
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/stable/c/1f03658f3e9b2f8fd1d1003ba389a0390b49a350
- git.kernel.org/stable/c/4e116372b7a4f87df0dc0ed4b0ab5b0bb0cc5796
- git.kernel.org/stable/c/568e68d8f80395a64848aa2946af8ade72da0ffb
- git.kernel.org/stable/c/662f6c6c6ff8a6c508e1646c09cae74e28f3cca6
- git.kernel.org/stable/c/82ec2c1e456b17451f0736c3983402642f961733
- git.kernel.org/stable/c/b70dc75e85ba968b7b76eebfe5d63000080b875b
- git.kernel.org/stable/c/c8510fbbea09ef0170b56b14dc2b5890dc75be07
- git.kernel.org/stable/c/eaf783c005299a702f2cc96b08cd21ede081f098
Vendor advisories and official records. Exploit/PoC links are deliberately left out.