---
title: "CVE-2026-62958: libriscv - Out-of-Bounds Read"
description: "libriscv < 1.18 contains an out-of-bounds read caused by improper validation of section-header offsets in binary loading, letting attackers crash the host or potentially disclose host memory, exploit requires crafted ELF binary."
url: https://panop.io/threat-heartbeat/CVE-2026-62958/
---

# CVE-2026-62958 libriscv - Out-of-Bounds Read

libriscv < 1.18 contains an out-of-bounds read caused by improper validation of section-header offsets in binary loading, letting attackers crash the host or potentially disclose host memory, exploit requires crafted ELF binary.

CVSS base score 7.9 /10

High

CISA KEV

Not listed

Public exploit

Proof of concept available

Authentication

Not required

EPSS

0.21% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-62958)

## Details

Type

Out-of-Bounds Read

Impact

Denial Of Service, Information Disclosure

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:H

Published

30 October 2026

Updated

1 November 2026

Weakness

[CWE-20](https://cwe.mitre.org/data/definitions/20.html)

## Vendor fix

Update to version 1.18 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-62958](https://nvd.nist.gov/vuln/detail/CVE-2026-62958)
- [https://github.com/libriscv/libriscv/commit/61ef9ca82c8876dd80b33780893ba512af780e93](https://github.com/libriscv/libriscv/commit/61ef9ca82c8876dd80b33780893ba512af780e93)
- [https://github.com/libriscv/libriscv/commit/7bd1c189f9f9d54368cde096b07b194ad680f9fa](https://github.com/libriscv/libriscv/commit/7bd1c189f9f9d54368cde096b07b194ad680f9fa)
- [https://github.com/libriscv/libriscv/releases/tag/v1.18](https://github.com/libriscv/libriscv/releases/tag/v1.18)
- [https://github.com/libriscv/libriscv/security/advisories/GHSA-gm4g-6c78-gr3w](https://github.com/libriscv/libriscv/security/advisories/GHSA-gm4g-6c78-gr3w)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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