CVE-2024-46735— ublk_drv: fix NULL pointer dereference in ublk_ctrl_start_recovery()
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I. Basic Information for CVE-2024-46735
Vulnerability Information
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Vulnerability Title
ublk_drv: fix NULL pointer dereference in ublk_ctrl_start_recovery()
Source: NVD (National Vulnerability Database)
Vulnerability 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>
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于空指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2024-46735
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Same Patch Batch · Linux · 2024-09-18 · 85 CVEs total
| CVE-2024-46770 | ice: Add netif_device_attach/detach into PF reset flow | |
| CVE-2024-46781 | nilfs2: fix missing cleanup on rollforward recovery error | |
| CVE-2024-46768 | hwmon: (hp-wmi-sensors) Check if WMI event data exists | |
| CVE-2024-46769 | spi: intel: Add check devm_kasprintf() returned value | |
| CVE-2024-46767 | net: phy: Fix missing of_node_put() for leds | |
| CVE-2024-46765 | ice: protect XDP configuration with a mutex | |
| CVE-2024-46763 | fou: Fix null-ptr-deref in GRO. | |
| CVE-2024-46762 | xen: privcmd: Fix possible access to a freed kirqfd instance | |
| CVE-2024-46761 | pci/hotplug/pnv_php: Fix hotplug driver crash on Powernv | |
| CVE-2024-46764 | bpf: add check for invalid name in btf_name_valid_section() | |
| CVE-2024-46771 | can: bcm: Remove proc entry when dev is unregistered. | |
| CVE-2024-46772 | drm/amd/display: Check denominator crb_pipes before used | |
| CVE-2024-46773 | drm/amd/display: Check denominator pbn_div before used | |
| CVE-2024-46774 | powerpc/rtas: Prevent Spectre v1 gadget construction in sys_rtas() | |
| CVE-2024-46775 | drm/amd/display: Validate function returns | |
| CVE-2024-46776 | drm/amd/display: Run DC_LOG_DC after checking link->link_enc | |
| CVE-2024-46777 | udf: Avoid excessive partition lengths | |
| CVE-2024-46778 | drm/amd/display: Check UnboundedRequestEnabled's value | |
| CVE-2024-46779 | drm/imagination: Free pvr_vm_gpuva after unlink | |
| CVE-2024-46780 | nilfs2: protect references to superblock parameters exposed in sysfs |
Showing top 20 of 85 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
V. Comments for CVE-2024-46735
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