VulnerabilityModified
CVE-2023-0459
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().
MEDIUM 5.5EPSS 0.64%
Does this matter?
Lower severity and a low EPSS score (0.64%). Track it; it rarely justifies an emergency change on its own.
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 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.64% probability · 49th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-763
- Affected
- linux/linux kernel
- Source
- cve-coordination@google.com
References
- https://github.com/torvalds/linux/commit/4b842e4e25b12951fa10dedb4bc16bc47e3b850cPatch
- https://github.com/torvalds/linux/commit/74e19ef0ff8061ef55957c3abd71614ef0f42f47Patch
- https://github.com/torvalds/linux/commit/4b842e4e25b12951fa10dedb4bc16bc47e3b850cPatch
- https://github.com/torvalds/linux/commit/74e19ef0ff8061ef55957c3abd71614ef0f42f47Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.