7.8

CVE-2023-53000: linux Improper Validation of Array Index

CVSS: 7.8v3.1HighAnalyzed
AliasesUBUNTU-CVE-2023-53000DEBIAN-CVE-2023-53000
Published 27-03-2025Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2023-53000 is a high (CVSS 7.8) Improper Validation of Array Index vulnerability in linux. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 11.4% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (NVD)
EPSS score
0.22%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 8 · Related 8
SUSE-SU-2025:02099-1SUSE-SU-2025:1176-1SUSE-SU-2025:1183-1SUSE-SU-2025:1194-1SUSE-SU-2025:1195-1SUSE-SU-2025:1241-1

Timeline

  1. 27-03-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: netlink: prevent potential spectre v1 gadgets Most netlink attributes are parsed and validated from __nla_validate_parse() or validate_nla() u16 type = nla_type(nla); if (type == 0 || type > maxtype) { /* error or continue */ } @type is then used as an array index and can be used as a Spectre v1 gadget. array_index_nospec() can be used to prevent leaking content of kernel memory to malicious users. This should take care of vast majority of netlink uses, but an audit is needed to take care of others where validation is not yet centralized in core netlink functions.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

11%

Versus all other CVEs

30-day change

+0.01 pp

From 0.21% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.22%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu113 products
  • linuxAll versions (No fix recorded) | < 5.4.0-147.164 | < 5.15.0-70.77
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1100.108 | < 5.15.0-1034.38
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ bfa83a9e03cf8d501c6272999843470afecb32ed, < 3e5082b1c66c7783fbcd79b5b178573230e528ff | ≥ bfa83a9e03cf8d501c6272999843470afecb32ed, < 539ca5dcbc91134bbe2c45677811c31d8b030d2d | ≥ bfa83a9e03cf8d501c6272999843470afecb32ed, < 41b74e95f297ac360ca7ed6bf200100717cb6c45 | ≥ bfa83a9e03cf8d501c6272999843470afecb32ed, < 992e4ff7116a77968039277b5d6aaa535c2f2184 | ≥ bfa83a9e03cf8d501c6272999843470afecb32ed, < f0950402e8c76e7dcb08563f1b4e8000fbc62455 | 2.6.15
  • linux_kernel≥ 2.6.15, < 5.4.231 | ≥ 5.5, < 5.10.166 | ≥ 5.11, < 5.15.91 | ≥ 5.16, < 6.1.9 | 6.2:rc1 | 6.2:rc2 | 6.2:rc3 | 6.2:rc4 | 6.2:rc5
Debian1 product
  • linux< 6.1.11-1

3 vendors · 116 products

References

9 links