6.5

CVE-2023-0459: Copy_from_user Spectre-V1 Gadget in Linux Kernel

Modified
AliasesUBUNTU-CVE-2023-0459DEBIAN-CVE-2023-0459
Published 25-05-2023Last modified 26-09-2024

Vulnerability summary

CVE-2023-0459 is a medium (CVSS 6.5) Release of Invalid Pointer or Reference vulnerability in linux linux_kernel. EPSS estimates a 0.64% chance of exploitation in the next 30 days, higher than 50.7% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 6.5, network access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.64%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 38 · Related 34
DLA-3403-1DLA-3404-1RHSA-2022:1975RHSA-2022:1988SUSE-SU-2023:3302-1SUSE-SU-2023:3309-1

Timeline

  1. 25-05-2023
    PublishedVulnerability first disclosed.
  2. 26-09-2024
    Last modifiedVulnerability information updated.

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

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.64%

Chance of exploitation in the next 30 days

Percentile

51%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.64% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: network-reachable, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu89 products
  • linux< 4.15.0-211.222 | < 5.4.0-149.166 | < 5.15.0-72.79
  • linux-aws< 4.15.0-1156.169 | < 5.4.0-1102.110 | < 5.15.0-1036.40
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
  • linux-aws-5.13All versions (No fix recorded)
Debian1 product
  • linux< 6.1.15-1
Linux1 product
  • 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

3 vendors · 91 products

References

28 links
Show all 28 references