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

EPSS 0.01% · P1

Affected Version Matrix 17

VendorProductVersion RangeStatus
LinuxLinuxa462067d7c8e6953a733bf5ade8db947b1bb5449< 5871761c5f0f20d6e98bf3b6bd7486d857589554affected
145c89c441d27696961752bf51b323f347601bee< 0c71d4c89559f72cec2592d078681a843bce570eaffected
caf5ac93b3b5d5fac032fc11fbea680e115421b4< 24b699bea7553fc0b98dad9d864befb6005ac7f1affected
92028d7a31e55d53e41cff679156b9432cffcb36< 5c17cfe155d21954b4c7e2a78fa771cebcd86725affected
4a2933c88399c0ebc738db39bbce3ae89786d723< d7fad2ce15bdbbd0fec3ebe999fd7cab2267f53eaffected
dc195928d7e4ec7b5cfc6cd10dc4c8d87a7c72ac< 90642ee9eb581a13569b1c0bd57e85d962215273affected
388d05f70f1ee0cac4a2068fd295072f1a44152a< 0f000005da31f6947f843ce6b3e3a960540c6e00affected
8a12f8836145ffe37e9c8733dce18c22fb668b66< 41c44e1f3112d7265dae522c026399b2a42d19efaffected
… +9 more rows
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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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