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CVE-2021-46905— net: hso: fix NULL-deref on disconnect regression

EPSS 0.01% · P1
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I. Basic Information for CVE-2021-46905

Vulnerability Information
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Vulnerability Title
net: hso: fix NULL-deref on disconnect regression
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: hso: fix NULL-deref on disconnect regression Commit 8a12f8836145 ("net: hso: fix null-ptr-deref during tty device unregistration") fixed the racy minor allocation reported by syzbot, but introduced an unconditional NULL-pointer dereference on every disconnect instead. Specifically, the serial device table must no longer be accessed after the minor has been released by hso_serial_tty_unregister().
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，该漏洞源于存在空指针取消引用问题。
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 a462067d7c8e6953a733bf5ade8db947b1bb5449 ~ 5871761c5f0f20d6e98bf3b6bd7486d857589554 -
LinuxLinux 5.12 -

II. Public POCs for CVE-2021-46905

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III. Intelligence Information for CVE-2021-46905

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Same Patch Batch · Linux · 2024-02-25 · 11 CVEs total

CVE-2023-52465power: supply: Fix null pointer dereference in smb2_probe
CVE-2023-52467mfd: syscon: Fix null pointer dereference in of_syscon_register()
CVE-2023-52468class: fix use-after-free in class_register()
CVE-2023-52469drivers/amd/pm: fix a use-after-free in kv_parse_power_table
CVE-2023-52470drm/radeon: check the alloc_workqueue return value in radeon_crtc_init()
CVE-2023-52471ice: Fix some null pointer dereference issues in ice_ptp.c
CVE-2023-52472crypto: rsa - add a check for allocation failure
CVE-2023-52473thermal: core: Fix NULL pointer dereference in zone registration error path
CVE-2021-46904net: hso: fix null-ptr-deref during tty device unregistration
CVE-2022-48626moxart: fix potential use-after-free on remove path

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-46905

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