# CVE-2026-64347: linux: In the Linux kernel, the following vulnerability has been resolved:  usb: gadget: composite: fix dead empty check in...

CVE-2026-64347 is fixed in 36 products on 1 platform, first by DEBIAN-CVE-2026-64347, released July 26, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-64347
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0010
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jul 25, 2026

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool ol 8 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | bpftool ol 9 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | dtb-aarch64 opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-64kb opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-64kb sles 15.7 | 6.4.0-150700.53.78.1 | [SUSE-SU-2026:3790-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3790-1.md) | Aug 25, 2026 |
| Linux | kernel-64kb sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-azure opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-azure sles 15.7 | 6.4.0-150700.53.78.1 | [SUSE-SU-2026:3790-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3790-1.md) | Aug 25, 2026 |
| Linux | kernel-azure sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-default opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-default sles 15.7 | 6.4.0-150700.53.78.1 | [SUSE-SU-2026:3790-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3790-1.md) | Aug 25, 2026 |
| Linux | kernel-default sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23237-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23237-1.md) | Aug 11, 2026 |
| Linux | kernel-default-base opensuse-leap 16.0 | 6.12.0-160000.37.1.160000.2.19 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-default-base sles 15.7 | 6.4.0-150700.53.78.1.150700.17.43.2 | [SUSE-SU-2026:3790-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3790-1.md) | Aug 25, 2026 |
| Linux | kernel-default-base sles 16.0 | 6.12.0-160000.37.1.160000.2.19 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-docs opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-docs sles 15.7 | 6.4.0-150700.53.78.1 | [SUSE-SU-2026:3790-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3790-1.md) | Aug 25, 2026 |
| Linux | kernel-docs sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-kvmsmall opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-kvmsmall sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-livepatch-SLE15-SP7-RT_Update_19 sles 15.7 | 1-150700.1.5.1 | [SUSE-SU-2026:3810-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3810-1.md) | Aug 26, 2026 |
| Linux | kernel-livepatch-SLE15-SP7_Update_20 sles 15.7 | 1-150700.15.3.2 | [SUSE-SU-2026:3790-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3790-1.md) | Aug 25, 2026 |
| Linux | kernel-obs-build opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-obs-build sles 15.7 | 6.4.0-150700.53.78.1 | [SUSE-SU-2026:3790-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3790-1.md) | Aug 25, 2026 |
| Linux | kernel-obs-qa opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-obs-qa sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-rt opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-source opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-source sles 15.7 | 6.4.0-150700.53.78.1 | [SUSE-SU-2026:3790-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3790-1.md) | Aug 25, 2026 |
| Linux | kernel-source sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-syms opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-syms sles 15.7 | 6.4.0-150700.53.78.1 | [SUSE-SU-2026:3790-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3790-1.md) | Aug 25, 2026 |
| Linux | kernel-syms sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | kernel-uek ol 8 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek ol 9 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-container ol 8 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-container ol 9 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-container-debug ol 8 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-container-debug ol 9 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-core ol 8 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-core ol 9 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-debug ol 8 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-debug ol 9 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-debug-core ol 8 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-debug-core ol 9 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-debug-devel ol 8 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-debug-devel ol 9 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-debug-modules ol 8 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-debug-modules ol 9 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-debug-modules-extra ol 8 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-debug-modules-extra ol 9 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-devel ol 8 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-devel ol 9 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-doc ol 8 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-doc ol 9 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-modules ol 8 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-modules ol 9 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-modules-extra ol 8 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek-modules-extra ol 9 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek64k ol 8 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek64k ol 9 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek64k-core ol 8 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek64k-core ol 9 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek64k-devel ol 8 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek64k-devel ol 9 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek64k-modules ol 8 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek64k-modules ol 9 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek64k-modules-extra ol 8 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-uek64k-modules-extra ol 9 | 0:5.15.0-324.217.5.2.el9uek | [ELSA-2026-500249](https://patchblox.com/security/data/fix/linux/elsa-2026-500249.md) | Sep 4, 2026 |
| Linux | kernel-zfcpdump opensuse-leap 16.0 | 6.12.0-160000.37.1 | [OPENSUSE-SU-2026:21555-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-21555-1.md) | Aug 12, 2026 |
| Linux | kernel-zfcpdump sles 15.7 | 6.4.0-150700.53.78.1 | [SUSE-SU-2026:3790-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-3790-1.md) | Aug 25, 2026 |
| Linux | kernel-zfcpdump sles 16.0 | 6.12.0-160000.37.1 | [SUSE-SU-2026:23231-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-23231-1.md) | Aug 11, 2026 |
| Linux | linux Debian 12.15 (bookworm) | 6.1.180-1 | [DEBIAN-CVE-2026-64347](https://patchblox.com/security/data/fix/linux/debian-cve-2026-64347.md) | Jul 26, 2026 |
| Linux | linux Debian 13.5 (trixie) | 6.12.96-1 | [DEBIAN-CVE-2026-64347](https://patchblox.com/security/data/fix/linux/debian-cve-2026-64347.md) | Jul 26, 2026 |
| Linux | linux Debian 14 | 7.1.4-1 | [DEBIAN-CVE-2026-64347](https://patchblox.com/security/data/fix/linux/debian-cve-2026-64347.md) | Jul 26, 2026 |
| Linux | linux-6.12 Debian 12.15 (bookworm) | 6.12.100-1~deb12u1 | [DEBIAN-CVE-2026-64347](https://patchblox.com/security/data/fix/linux/debian-cve-2026-64347.md) | Jul 26, 2026 |

---

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