CVE-2026-64347
usb: gadget: composite: fix dead empty check in the USB_DT_OTG handler
At a glance
- Source
- NVD
- EPSS
- EPSS 0.10 % · percentile 1 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Analyzed
Description
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: composite: fix dead empty check in the USB_DT_OTG handler The OTG branch of composite_setup() falls back to the first configuration when none is selected: if (cdev->config) config = cdev->config; else config = list_first_entry(&cdev->configs, struct usb_configuration, list); if (!config) goto done; ... memcpy(req->buf, config->descriptors[0], value); list_first_entry() never returns NULL. On an empty list it returns container_of() of the list head. So the "if (!config)" check is dead. When cdev->configs is empty, config points at the head inside struct usb_composite_dev. config->descriptors[0] reads whatever sits at that offset. The memcpy copies up to w_length bytes of it into the response buffer. cdev->configs can be empty in two cases. One is a teardown race on gadget unbind with a control transfer in flight. The other is a driver that sets is_otg before it adds a config. A reproducer that holds cdev->configs empty triggers a KASAN fault in this branch. Use list_first_entry_or_null() so the existing check does its job.
Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/2454264b2ab4cf0055c0bfd39e79f830452bd0db
- https://git.kernel.org/stable/c/d3e72cfef2e38bd588055739a8100d14f9773b17
- https://git.kernel.org/stable/c/8ac463fe6c0f85bdb1ce8c30e8c9e060802e4483
- https://git.kernel.org/stable/c/56add2b9b2e89ec61c0761165d758f73004fdfdf
- https://git.kernel.org/stable/c/91b3ecd34b60f950c50c560974945b6596a6f207
- https://git.kernel.org/stable/c/01feaf024f29618d5ffa7ab0fd858e0579dcbf7b
- https://git.kernel.org/stable/c/fcb21bf747640c9d6bd1eda9da85420f076d59c1
- https://git.kernel.org/stable/c/f8f680609c2b3ab795ffcd6f21585b6dfc46d395
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2026-48891
- GCVE · GCVE-0-2026-64347
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1333 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1286 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1252 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1229 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1203 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1162 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1091 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1064 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1031 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0982 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 4.3 < 5.10.261cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11 < 5.15.212cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.16 < 6.1.178cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.2 < 6.6.145cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.7 < 6.12.96cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.13 < 6.18.39cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.19 < 7.1.4cpe:2.3:o:linux:linux_kernel:7.2:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.2:rc2:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 53e6242db8d60da0587d36951cc9434d1a1c21dd < 2454264b2ab4cf0055c0bfd39e79f830452bd0db ; affected 53e6242db8d60da0587d36951cc9434d1a1c21dd < d3e72cfef2e38bd588055739a8100d14f9773b17 ; affected 53e6242db8d60da0587d36951cc9434d1a1c21dd < 8ac463fe6c0f85bdb1ce8c30e8c9e060802e4483 ; affected 53e6242db8d60da0587d36951cc9434d1a1c21dd < 56add2b9b2e89ec61c0761165d758f73004fdfdf ; affected 53e6242db8d60da0587d36951cc9434d1a1c21dd < 91b3ecd34b60f950c50c560974945b6596a6f207 ; affected 53e6242db8d60da0587d36951cc9434d1a1c21dd < 01feaf024f29618d5ffa7ab0fd858e0579dcbf7b |
| Linux · Linux | affected 4.3 ; unaffected 0 < 4.3 ; unaffected 5.10.261 ≤ 5.10.* ; unaffected 5.15.212 ≤ 5.15.* ; unaffected 6.1.178 ≤ 6.1.* ; unaffected 6.6.145 ≤ 6.6.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |