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CVE-2024-56764— ublk: detach gendisk from ublk device if add_disk() fails

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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，该漏洞源于在ublk模块中，当add_disk失败时，gendisk可能已被释放，但在ublk_abort_requests中仍尝试获取磁盘的引用，导致释放后重用错误，影响ublk设备的正常工作和数据传输的可靠性。

CVSS 7.8 · High EPSS 0.20% · P9

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux bd23f6c2c2d00518e2f27f2d25cef795de9bee56< 7d680f2f76a3417fdfc3946da7471e81464f7b41 affected
bd23f6c2c2d00518e2f27f2d25cef795de9bee56< 75cd4005da5492129917a4a4ee45e81660556104 affected
6.7 affected
< 6.7 unaffected
6.12.8≤ 6.12.* unaffected
6.13≤ * unaffected
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I. Basic Information for CVE-2024-56764

Vulnerability Information
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Vulnerability Title
ublk: detach gendisk from ublk device if add_disk() fails
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ublk: detach gendisk from ublk device if add_disk() fails Inside ublk_abort_requests(), gendisk is grabbed for aborting all inflight requests. And ublk_abort_requests() is called when exiting the uring context or handling timeout. If add_disk() fails, the gendisk may have been freed when calling ublk_abort_requests(), so use-after-free can be caused when getting disk's reference in ublk_abort_requests(). Fixes the bug by detaching gendisk from ublk device if add_disk() fails.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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，该漏洞源于在ublk模块中，当add_disk失败时，gendisk可能已被释放，但在ublk_abort_requests中仍尝试获取磁盘的引用，导致释放后重用错误，影响ublk设备的正常工作和数据传输的可靠性。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux bd23f6c2c2d00518e2f27f2d25cef795de9bee56 ~ 7d680f2f76a3417fdfc3946da7471e81464f7b41 -
Linux Linux 6.7 -

II. Public POCs for CVE-2024-56764

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III. Intelligence Information for CVE-2024-56764

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Patches & Fixes for CVE-2024-56764 (2)

Same Patch Batch · Linux · 2025-01-06 · 12 CVEs total

CVE-2024-56757 7.8 HIGH Bluetooth: btusb: mediatek: add intf release flow when usb disconnect
CVE-2024-56759 7.8 HIGH btrfs: fix use-after-free when COWing tree bock and tracing is enabled
CVE-2024-56765 7.8 HIGH powerpc/pseries/vas: Add close() callback in vas_vm_ops struct
CVE-2024-56758 btrfs: check folio mapping after unlock in relocate_one_folio()
CVE-2024-56760 PCI/MSI: Handle lack of irqdomain gracefully
CVE-2024-56761 x86/fred: Clear WFE in missing-ENDBRANCH #CPs
CVE-2024-56763 tracing: Prevent bad count for tracing_cpumask_write
CVE-2024-56767 dmaengine: at_xdmac: avoid null_prt_deref in at_xdmac_prep_dma_memset
CVE-2024-56766 mtd: rawnand: fix double free in atmel_pmecc_create_user()
CVE-2024-56768 bpf: Fix bpf_get_smp_processor_id() on !CONFIG_SMP
CVE-2024-56769 media: dvb-frontends: dib3000mb: fix uninit-value in dib3000_write_reg

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-56764

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