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CVE-2023-0459

Copy_from_user Spectre-V1 Gadget in Linux Kernel

Medium6.5EPSS 0.64%
Published
Updated
Reserved
Assigned by
Google

Description

Copy_from_user on 64-bit versions of the Linux kernel does not implement the __uaccess_begin_nospec allowing a user to bypass the "access_ok" check and pass a kernel pointer to copy_from_user(). This would allow an attacker to leak information. We recommend upgrading beyond commit 74e19ef0ff8061ef55957c3abd71614ef0f42f47

Scores

CVSS scores of CVE-2023-0459, by who scored it
Scored byCVSSScoreVector
GoogleCNA (assigner)3.1Medium6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
NVDNVD · Modified3.1Medium5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
EPSS (exploitation in 30 days)
0.64% · top 49% of all CVEs (6 Nov 2026)
CISA SSVC
Exploitation: none · Automatable: no · Technical impact: partial
Loading the EPSS history…

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.5.

Weakness

Affected products

  • Linux · Linux Kernel

    • affected 4b842e4e25b12951fa10dedb4bc16bc47e3b850c – ≤ 74e19ef0ff8061ef55957c3abd71614ef0f42f47

References (2)

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .