# CVE-2024-56571: linux: In the Linux kernel, the following vulnerability has been resolved:  media: uvcvideo: Require entities to have a non-...

CVE-2024-56571 is fixed in 40 products on 1 platform, first by CVE-2024-56571, released December 27, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-56571
- Priority: Routine
- CVSS: 5.5 (IMPORTANT)
- EPSS: n/a
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Dec 27, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  media: uvcvideo: Require entities to have a non-zero unique ID  Per UVC 1.1+ specification 3.7.2, units and terminals must have a non-zero unique ID.  ``` Each Unit and Terminal within the video function is assigned a unique identification number, the Unit ID (UID) or Terminal ID (TID), contained in the bUnitID or bTerminalID field of the descriptor. The value 0x00 is reserved for undefined ID, ```  So, deny allocating an entity with ID 0 or an ID that belongs to a unit that is already added to the list of entities.  This also prevents some syzkaller reproducers from triggering warnings due to a chain of entities referring to themselves. In one particular case, an Output Unit is connected to an Input Unit, both with the same ID of 1. But when looking up for the source ID of the Output Unit, that same entity is found instead of the input entity, which leads to such warnings.  In another case, a backward chain was considered finished as the source ID was 0. Later on, that entity was found, but its pads were not valid.  Here is a sample stack trace for one of those cases.  [   20.650953] usb 1-1: new high-speed USB device number 2 using dummy_hcd [   20.830206] usb 1-1: Using ep0 maxpacket: 8 [   20.833501] usb 1-1: config 0 descriptor?? [   21.038518] usb 1-1: string descriptor 0 read error: -71 [   21.038893] usb 1-1: Found UVC 0.00 device <unnamed> (2833:0201) [   21.039299] uvcvideo 1-1:0.0: Entity type for entity Output 1 was not initialized! [   21.041583] uvcvideo 1-1:0.0: Entity type for entity Input 1 was not initialized! [   21.042218] ------------[ cut here ]------------ [   21.042536] WARNING: CPU: 0 PID: 9 at drivers/media/mc/mc-entity.c:1147 media_create_pad_link+0x2c4/0x2e0 [   21.043195] Modules linked in: [   21.043535] CPU: 0 UID: 0 PID: 9 Comm: kworker/0:1 Not tainted 6.11.0-rc7-00030-g3480e43aeccf #444 [   21.044101] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.15.0-1 04/01/2014 [   21.044639] Workqueue: usb_hub_wq hub_event [   21.045100] RIP: 0010:media_create_pad_link+0x2c4/0x2e0 [   21.045508] Code: fe e8 20 01 00 00 b8 f4 ff ff ff 48 83 c4 30 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 0f 0b eb e9 0f 0b eb 0a 0f 0b eb 06 <0f> 0b eb 02 0f 0b b8 ea ff ff ff eb d4 66 2e 0f 1f 84 00 00 00 00 [   21.046801] RSP: 0018:ffffc9000004b318 EFLAGS: 00010246 [   21.047227] RAX: ffff888004e5d458 RBX: 0000000000000000 RCX: ffffffff818fccf1 [   21.047719] RDX: 000000000000007b RSI: 0000000000000000 RDI: ffff888004313290 [   21.048241] RBP: ffff888004313290 R08: 0001ffffffffffff R09: 0000000000000000 [   21.048701] R10: 0000000000000013 R11: 0001888004313290 R12: 0000000000000003 [   21.049138] R13: ffff888004313080 R14: ffff888004313080 R15: 0000000000000000 [   21.049648] FS:  0000000000000000(0000) GS:ffff88803ec00000(0000) knlGS:0000000000000000 [   21.050271] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [   21.050688] CR2: 0000592cc27635b0 CR3: 000000000431c000 CR4: 0000000000750ef0 [   21.051136] PKRU: 55555554 [   21.051331] Call Trace: [   21.051480]  <TASK> [   21.051611]  ? __warn+0xc4/0x210 [   21.051861]  ? media_create_pad_link+0x2c4/0x2e0 [   21.052252]  ? report_bug+0x11b/0x1a0 [   21.052540]  ? trace_hardirqs_on+0x31/0x40 [   21.052901]  ? handle_bug+0x3d/0x70 [   21.053197]  ? exc_invalid_op+0x1a/0x50 [   21.053511]  ? asm_exc_invalid_op+0x1a/0x20 [   21.053924]  ? media_create_pad_link+0x91/0x2e0 [   21.054364]  ? media_create_pad_link+0x2c4/0x2e0 [   21.054834]  ? media_create_pad_link+0x91/0x2e0 [   21.055131]  ? _raw_spin_unlock+0x1e/0x40 [   21.055441]  ? __v4l2_device_register_subdev+0x202/0x210 [   21.055837]  uvc_mc_register_entities+0x358/0x400 [   21.056144]  uvc_register_chains+0x1fd/0x290 [   21.056413]  uvc_probe+0x380e/0x3dc0 [   21.056676]  ? __lock_acquire+0x5aa/0x26e0 [   21.056946]  ? find_held_lock+0x33/0xa0 [   21.057196]  ? kernfs_activate+0x70/0x80 [   21.057533]  ? usb_match_dy ---truncated---

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | bpftool ol 8 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | bpftool ol 9 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | dtb-aarch64 opensuse-leap 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 |
| Linux | kernel-64kb opensuse-leap 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 |
| Linux | kernel-64kb sles 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 |
| Linux | kernel-azure opensuse-leap 15.6 | 6.4.0-150600.8.26.1 | [SUSE-SU-2025:0428-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0428-1.md) | Feb 11, 2025 |
| Linux | kernel-azure sles 15.6 | 6.4.0-150600.8.26.1 | [SUSE-SU-2025:0428-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0428-1.md) | Feb 11, 2025 |
| Linux | kernel-coco sles 15.6 | 6.4.0-15061.12.coco15sp6.1 | [SUSE-SU-2025:0289-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0289-1.md) | Jan 29, 2025 |
| Linux | kernel-coco_debug sles 15.6 | 6.4.0-15061.12.coco15sp6.1 | [SUSE-SU-2025:0289-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0289-1.md) | Jan 29, 2025 |
| Linux | kernel-debug opensuse-leap 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 |
| Linux | kernel-default opensuse-leap 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 |
| Linux | kernel-default sles 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 |
| Linux | kernel-default-base opensuse-leap 15.6 | 6.4.0-150600.23.38.1.150600.12.16.2 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 |
| Linux | kernel-default-base sles 15.6 | 6.4.0-150600.23.38.1.150600.12.16.2 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 |
| Linux | kernel-docs opensuse-leap 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 |
| Linux | kernel-docs sles 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 |
| Linux | kernel-kvmsmall opensuse-leap 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 |
| Linux | kernel-livepatch-SLE15-SP6-RT_Update_8 sles 15.6 | 1-150600.1.3.1 | [SUSE-SU-2025:0557-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0557-1.md) | Feb 14, 2025 |
| Linux | kernel-livepatch-SLE15-SP6_Update_8 sles 15.6 | 1-150600.13.3.2 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 |
| Linux | kernel-obs-build opensuse-leap 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 |
| Linux | kernel-obs-build sles 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 |
| Linux | kernel-obs-qa opensuse-leap 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 |
| Linux | kernel-rt opensuse-leap 15.6 | 6.4.0-150600.10.26.1 | [SUSE-SU-2025:0557-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0557-1.md) | Feb 14, 2025 |
| Linux | kernel-rt_debug opensuse-leap 15.6 | 6.4.0-150600.10.26.1 | [SUSE-SU-2025:0557-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0557-1.md) | Feb 14, 2025 |
| Linux | kernel-source opensuse-leap 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 |
| Linux | kernel-source sles 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 |
| Linux | kernel-source-azure opensuse-leap 15.6 | 6.4.0-150600.8.26.1 | [SUSE-SU-2025:0428-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0428-1.md) | Feb 11, 2025 |
| Linux | kernel-source-azure sles 15.6 | 6.4.0-150600.8.26.1 | [SUSE-SU-2025:0428-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0428-1.md) | Feb 11, 2025 |
| Linux | kernel-source-coco sles 15.6 | 6.4.0-15061.12.coco15sp6.1 | [SUSE-SU-2025:0289-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0289-1.md) | Jan 29, 2025 |
| Linux | kernel-source-rt opensuse-leap 15.6 | 6.4.0-150600.10.26.1 | [SUSE-SU-2025:0557-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0557-1.md) | Feb 14, 2025 |
| Linux | kernel-syms opensuse-leap 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 |
| Linux | kernel-syms sles 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 |
| Linux | kernel-syms-azure opensuse-leap 15.6 | 6.4.0-150600.8.26.1 | [SUSE-SU-2025:0428-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0428-1.md) | Feb 11, 2025 |
| Linux | kernel-syms-azure sles 15.6 | 6.4.0-150600.8.26.1 | [SUSE-SU-2025:0428-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0428-1.md) | Feb 11, 2025 |
| Linux | kernel-syms-coco sles 15.6 | 6.4.0-15061.12.coco15sp6.1 | [SUSE-SU-2025:0289-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0289-1.md) | Jan 29, 2025 |
| Linux | kernel-syms-rt opensuse-leap 15.6 | 6.4.0-150600.10.26.1 | [SUSE-SU-2025:0557-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0557-1.md) | Feb 14, 2025 |
| Linux | kernel-uek ol 8 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek ol 9 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-container ol 8 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-container ol 9 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-container-debug ol 8 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-container-debug ol 9 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-core ol 8 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-core ol 9 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-debug ol 8 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-debug ol 9 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-debug-core ol 8 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-debug-core ol 9 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-debug-devel ol 8 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-debug-devel ol 9 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-debug-modules ol 8 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-debug-modules ol 9 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-debug-modules-extra ol 8 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-debug-modules-extra ol 9 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-devel ol 8 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-devel ol 9 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-doc ol 8 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-doc ol 9 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-modules ol 8 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-modules ol 9 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-modules-extra ol 8 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-uek-modules-extra ol 9 | 0:5.15.0-305.176.4.el9uek | [ELSA-2025-20095](https://patchblox.com/security/data/fix/linux/elsa-2025-20095.md) | Feb 9, 2025 |
| Linux | kernel-zfcpdump opensuse-leap 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 |
| Linux | kernel-zfcpdump sles 15.6 | 6.4.0-150600.23.38.1 | [SUSE-SU-2025:0499-1](https://patchblox.com/security/data/fix/linux/suse-su-2025-0499-1.md) | Feb 13, 2025 |
| Linux | linux Debian 12.15 (bookworm) | 6.1.123-1 | [CVE-2024-56571](https://patchblox.com/security/data/fix/linux/cve-2024-56571.md) | Dec 27, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.12.5-1 | [CVE-2024-56571](https://patchblox.com/security/data/fix/linux/cve-2024-56571.md) | Dec 27, 2024 |

---

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