What’s Vulnerable › Vulnerabilities

CVE-2023-23003

• Severity: medium (CVSS 4.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-03-01 · updated 2026-06-17
• Weakness: CWE-252

Description

In the Linux kernel before 5.16, tools/perf/util/expr.c lacks a check for the hashmap__new return value.

Affected products

• Linux kernel: before 5.16 — fixed in 5.16

How to fix

Upgrade to a fixed version: Linux kernel 5.16. Check the vendor advisory for mitigations.

References

• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16
• https://github.com/torvalds/linux/commit/0a515a06c5ebfa46fee3ac519e418f801e718da4
• https://security.netapp.com/advisory/ntap-20230331-0003/
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16
• https://github.com/torvalds/linux/commit/0a515a06c5ebfa46fee3ac519e418f801e718da4
• https://security.netapp.com/advisory/ntap-20230331-0003/

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