CVE-2023-0459

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

CVSS Metrics

• v3.1•MEDIUM•Score: 6.5CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
• v3.1•MEDIUM•Score: 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS Trends

Current EPSS score: 0.02%• Percentile: 5%

Techniques & Countermeasures

• CWE-763•Release of Invalid Pointer or Reference

  The product attempts to return a memory resource to the system, but it calls the wrong release function or calls the appropriate release function incorrectly.

Affected Systems

• linux•linux_kernel

  ≥ 4b842e4e25b12951fa10dedb4bc16bc47e3b850c, ≤ 74e19ef0ff8061ef55957c3abd71614ef0f42f47 | < 4.14.307 | ≥ 4.19.0, < 4.19.274 | ≥ 5.4.0, < 5.4.233 | ≥ 5.10.0, < 5.10.170 | ≥ 5.15.0, < 5.15.96 | ≥ 6.1.0, < 6.1.14 | ≥ 6.2.0, < 6.2.1

References (2)

• https://github.com/torvalds/linux/commit/4b842e4e25b12951fa10dedb4bc16bc47e3b850c
• https://github.com/torvalds/linux/commit/74e19ef0ff8061ef55957c3abd71614ef0f42f47