Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1000 CNY

100.0%
Buy Us a Coffee

CVE-2024-36478— null_blk: fix null-ptr-dereference while configuring 'power' and 'submit_queues'

EPSS 0.01% · P2
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2024-36478

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
null_blk: fix null-ptr-dereference while configuring 'power' and 'submit_queues'
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: null_blk: fix null-ptr-dereference while configuring 'power' and 'submit_queues' Writing 'power' and 'submit_queues' concurrently will trigger kernel panic: Test script: modprobe null_blk nr_devices=0 mkdir -p /sys/kernel/config/nullb/nullb0 while true; do echo 1 > submit_queues; echo 4 > submit_queues; done & while true; do echo 1 > power; echo 0 > power; done Test result: BUG: kernel NULL pointer dereference, address: 0000000000000148 Oops: 0000 [#1] PREEMPT SMP RIP: 0010:__lock_acquire+0x41d/0x28f0 Call Trace: <TASK> lock_acquire+0x121/0x450 down_write+0x5f/0x1d0 simple_recursive_removal+0x12f/0x5c0 blk_mq_debugfs_unregister_hctxs+0x7c/0x100 blk_mq_update_nr_hw_queues+0x4a3/0x720 nullb_update_nr_hw_queues+0x71/0xf0 [null_blk] nullb_device_submit_queues_store+0x79/0xf0 [null_blk] configfs_write_iter+0x119/0x1e0 vfs_write+0x326/0x730 ksys_write+0x74/0x150 This is because del_gendisk() can concurrent with blk_mq_update_nr_hw_queues(): nullb_device_power_store nullb_apply_submit_queues null_del_dev del_gendisk nullb_update_nr_hw_queues if (!dev->nullb) // still set while gendisk is deleted return 0 blk_mq_update_nr_hw_queues dev->nullb = NULL Fix this problem by resuing the global mutex to protect nullb_device_power_store() and nullb_update_nr_hw_queues() from configfs.
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null_blk模块配置power和submit_queues时存在空指针取消引用。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux 45919fbfe1c487c17ea1d198534339a5e8abeae3 ~ 1d4c8baef435c98e8d5aa7027dc5a9f70834ba16 -
LinuxLinux 5.5 -

II. Public POCs for CVE-2024-36478

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2024-36478

请登录查看更多情报信息。

Same Patch Batch · Linux · 2024-06-21 · 40 CVEs total

CVE-2024-38636f2fs: multidev: fix to recognize valid zero block address
CVE-2024-38627stm class: Fix a double free in stm_register_device()
CVE-2024-38628usb: gadget: u_audio: Fix race condition use of controls after free during gadget unbind.
CVE-2024-38629dmaengine: idxd: Avoid unnecessary destruction of file_ida
CVE-2024-38630watchdog: cpu5wdt.c: Fix use-after-free bug caused by cpu5wdt_trigger
CVE-2024-38631iio: adc: PAC1934: fix accessing out of bounds array index
CVE-2024-38632vfio/pci: fix potential memory leak in vfio_intx_enable()
CVE-2024-38633serial: max3100: Update uart_driver_registered on driver removal
CVE-2024-38634serial: max3100: Lock port->lock when calling uart_handle_cts_change()
CVE-2024-38635soundwire: cadence: fix invalid PDI offset
CVE-2024-38625fs/ntfs3: Check 'folio' pointer for NULL
CVE-2024-38637greybus: lights: check return of get_channel_from_mode
CVE-2024-38659enic: Validate length of nl attributes in enic_set_vf_port
CVE-2024-38662bpf: Allow delete from sockmap/sockhash only if update is allowed
CVE-2024-38780dma-buf/sw-sync: don't enable IRQ from sync_print_obj()
CVE-2024-39277dma-mapping: benchmark: handle NUMA_NO_NODE correctly
CVE-2024-34777dma-mapping: benchmark: fix node id validation
CVE-2024-36288SUNRPC: Fix loop termination condition in gss_free_in_token_pages()
CVE-2024-36477tpm_tis_spi: Account for SPI header when allocating TPM SPI xfer buffer
CVE-2024-36481tracing/probes: fix error check in parse_btf_field()

Showing top 20 of 40 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-36478

No comments yet

Leave a comment