# CVE-2024-46735: linux: In the Linux kernel, the following vulnerability has been resolved:  ublk_drv: fix NULL pointer dereference in ublk_c...

CVE-2024-46735 is fixed in 26 products on 1 platform, first by DEBIAN-CVE-2024-46735, released September 18, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2024-46735
- Priority: Routine
- CVSS: 5.5 (medium)
- EPSS: 0.0025
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Sep 18, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  ublk_drv: fix NULL pointer dereference in ublk_ctrl_start_recovery()  When two UBLK_CMD_START_USER_RECOVERY commands are submitted, the first one sets 'ubq->ubq_daemon' to NULL, and the second one triggers WARN in ublk_queue_reinit() and subsequently a NULL pointer dereference issue.  Fix it by adding the check in ublk_ctrl_start_recovery() and return immediately in case of zero 'ub->nr_queues_ready'.    BUG: kernel NULL pointer dereference, address: 0000000000000028   RIP: 0010:ublk_ctrl_start_recovery.constprop.0+0x82/0x180   Call Trace:    <TASK>    ? __die+0x20/0x70    ? page_fault_oops+0x75/0x170    ? exc_page_fault+0x64/0x140    ? asm_exc_page_fault+0x22/0x30    ? ublk_ctrl_start_recovery.constprop.0+0x82/0x180    ublk_ctrl_uring_cmd+0x4f7/0x6c0    ? pick_next_task_idle+0x26/0x40    io_uring_cmd+0x9a/0x1b0    io_issue_sqe+0x193/0x3f0    io_wq_submit_work+0x9b/0x390    io_worker_handle_work+0x165/0x360    io_wq_worker+0xcb/0x2f0    ? finish_task_switch.isra.0+0x203/0x290    ? finish_task_switch.isra.0+0x203/0x290    ? __pfx_io_wq_worker+0x10/0x10    ret_from_fork+0x2d/0x50    ? __pfx_io_wq_worker+0x10/0x10    ret_from_fork_asm+0x1a/0x30    </TASK>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | dtb-aarch64 opensuse-leap 15.6 | 6.4.0-150600.23.25.1 | [SUSE-SU-2024:3561-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3561-1.md) | Oct 9, 2024 |
| Linux | kernel-64kb opensuse-leap 15.6 | 6.4.0-150600.23.25.1 | [SUSE-SU-2024:3561-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3561-1.md) | Oct 9, 2024 |
| Linux | kernel-64kb sles 15.6 | 6.4.0-150600.23.25.1 | [SUSE-SU-2024:3561-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3561-1.md) | Oct 9, 2024 |
| Linux | kernel-azure opensuse-leap 15.6 | 6.4.0-150600.8.14.1 | [SUSE-SU-2024:3551-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3551-1.md) | Oct 8, 2024 |
| Linux | kernel-azure sles 15.6 | 6.4.0-150600.8.14.1 | [SUSE-SU-2024:3551-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3551-1.md) | Oct 8, 2024 |
| Linux | kernel-coco sles 15.6 | 6.4.0-15061.6.coco15sp6.1 | [SUSE-SU-2024:3553-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3553-1.md) | Oct 8, 2024 |
| Linux | kernel-coco_debug sles 15.6 | 6.4.0-15061.6.coco15sp6.1 | [SUSE-SU-2024:3553-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3553-1.md) | Oct 8, 2024 |
| Linux | kernel-debug opensuse-leap 15.6 | 6.4.0-150600.23.25.1 | [SUSE-SU-2024:3561-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3561-1.md) | Oct 9, 2024 |
| Linux | kernel-default opensuse-leap 15.6 | 6.4.0-150600.23.25.1 | [SUSE-SU-2024:3561-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3561-1.md) | Oct 9, 2024 |
| Linux | kernel-default sles 15.6 | 6.4.0-150600.23.25.1 | [SUSE-SU-2024:3561-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3561-1.md) | Oct 9, 2024 |
| Linux | kernel-default-base opensuse-leap 15.6 | 6.4.0-150600.23.25.1.150600.12.10.2 | [SUSE-SU-2024:3561-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3561-1.md) | Oct 9, 2024 |
| Linux | kernel-default-base sles 15.6 | 6.4.0-150600.23.25.1.150600.12.10.2 | [SUSE-SU-2024:3561-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3561-1.md) | Oct 9, 2024 |
| Linux | kernel-docs opensuse-leap 15.6 | 6.4.0-150600.23.25.2 | [SUSE-SU-2024:3561-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3561-1.md) | Oct 9, 2024 |
| Linux | kernel-docs sles 15.6 | 6.4.0-150600.23.25.2 | [SUSE-SU-2024:3561-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3561-1.md) | Oct 9, 2024 |
| Linux | kernel-kvmsmall opensuse-leap 15.6 | 6.4.0-150600.23.25.1 | [SUSE-SU-2024:3561-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3561-1.md) | Oct 9, 2024 |
| Linux | kernel-livepatch-SLE15-SP6-RT_Update_4 sles 15.6 | 1-150600.1.3.1 | [SUSE-SU-2024:3564-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3564-1.md) | Oct 9, 2024 |
| Linux | kernel-livepatch-SLE15-SP6_Update_5 sles 15.6 | 1-150600.13.3.1 | [SUSE-SU-2024:3561-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3561-1.md) | Oct 9, 2024 |
| Linux | kernel-obs-build opensuse-leap 15.6 | 6.4.0-150600.23.25.2 | [SUSE-SU-2024:3561-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3561-1.md) | Oct 9, 2024 |
| Linux | kernel-obs-build sles 15.6 | 6.4.0-150600.23.25.2 | [SUSE-SU-2024:3561-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3561-1.md) | Oct 9, 2024 |
| Linux | kernel-obs-qa opensuse-leap 15.6 | 6.4.0-150600.23.25.1 | [SUSE-SU-2024:3561-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3561-1.md) | Oct 9, 2024 |
| Linux | kernel-rt opensuse-leap 15.6 | 6.4.0-150600.10.14.1 | [SUSE-SU-2024:3564-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3564-1.md) | Oct 9, 2024 |
| Linux | kernel-rt_debug opensuse-leap 15.6 | 6.4.0-150600.10.14.1 | [SUSE-SU-2024:3564-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3564-1.md) | Oct 9, 2024 |
| Linux | kernel-source opensuse-leap 15.6 | 6.4.0-150600.23.25.1 | [SUSE-SU-2024:3561-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3561-1.md) | Oct 9, 2024 |
| Linux | kernel-source sles 15.6 | 6.4.0-150600.23.25.1 | [SUSE-SU-2024:3561-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3561-1.md) | Oct 9, 2024 |
| Linux | kernel-source-azure opensuse-leap 15.6 | 6.4.0-150600.8.14.1 | [SUSE-SU-2024:3551-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3551-1.md) | Oct 8, 2024 |
| Linux | kernel-source-azure sles 15.6 | 6.4.0-150600.8.14.1 | [SUSE-SU-2024:3551-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3551-1.md) | Oct 8, 2024 |
| Linux | kernel-source-coco sles 15.6 | 6.4.0-15061.6.coco15sp6.1 | [SUSE-SU-2024:3553-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3553-1.md) | Oct 8, 2024 |
| Linux | kernel-source-rt opensuse-leap 15.6 | 6.4.0-150600.10.14.1 | [SUSE-SU-2024:3564-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3564-1.md) | Oct 9, 2024 |
| Linux | kernel-syms opensuse-leap 15.6 | 6.4.0-150600.23.25.1 | [SUSE-SU-2024:3561-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3561-1.md) | Oct 9, 2024 |
| Linux | kernel-syms sles 15.6 | 6.4.0-150600.23.25.1 | [SUSE-SU-2024:3561-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3561-1.md) | Oct 9, 2024 |
| Linux | kernel-syms-azure opensuse-leap 15.6 | 6.4.0-150600.8.14.1 | [SUSE-SU-2024:3551-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3551-1.md) | Oct 8, 2024 |
| Linux | kernel-syms-azure sles 15.6 | 6.4.0-150600.8.14.1 | [SUSE-SU-2024:3551-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3551-1.md) | Oct 8, 2024 |
| Linux | kernel-syms-coco sles 15.6 | 6.4.0-15061.6.coco15sp6.1 | [SUSE-SU-2024:3553-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3553-1.md) | Oct 8, 2024 |
| Linux | kernel-syms-rt opensuse-leap 15.6 | 6.4.0-150600.10.14.1 | [SUSE-SU-2024:3564-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3564-1.md) | Oct 9, 2024 |
| Linux | kernel-zfcpdump opensuse-leap 15.6 | 6.4.0-150600.23.25.1 | [SUSE-SU-2024:3561-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3561-1.md) | Oct 9, 2024 |
| Linux | kernel-zfcpdump sles 15.6 | 6.4.0-150600.23.25.1 | [SUSE-SU-2024:3561-1](https://patchblox.com/security/data/fix/linux/suse-su-2024-3561-1.md) | Oct 9, 2024 |
| Linux | linux Debian 12.15 (bookworm) | 6.1.112-1 | [DEBIAN-CVE-2024-46735](https://patchblox.com/security/data/fix/linux/debian-cve-2024-46735.md) | Sep 18, 2024 |
| Linux | linux Debian 13.5 (trixie) | 6.10.11-1 | [DEBIAN-CVE-2024-46735](https://patchblox.com/security/data/fix/linux/debian-cve-2024-46735.md) | Sep 18, 2024 |
| Linux | linux Debian 14 | 6.10.11-1 | [DEBIAN-CVE-2024-46735](https://patchblox.com/security/data/fix/linux/debian-cve-2024-46735.md) | Sep 18, 2024 |

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