---
cve: "CVE-2026-57432"
severity: "HIGH"
cvss: 8.4
epss: "21%"
vendor: "Generic Security"
kev: false
exploited: false
published: "2026-07-13 17:17:55"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-18T01:09:16+02:00"
---

# CVE-2026-57432

> 8.4 HIGH · 🧪 PoC

## Beschreibung

Perl versions before 5.40.5-RC1, from 5.41.0 before 5.42.3-RC1, from 5.43.0 before 5.43.11 have an integer overflow in S_measure_struct leading to an out-of-bounds heap read in pack and unpack.

S_measure_struct adds each item's size times its repeat count to a running total with no overflow check, so a large repeat count in a pack or unpack template wraps the signed SSize_t total negative. The @, X, and x position codes then guard their moves with a signed length comparison that passes when the length is negative, advancing the buffer pointer out of bounds.

A template derived from untrusted input can read heap memory past the buffer and return it to the caller.

## CVSS-Vektor

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

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Lokal | good |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Patch verfügbar (OSV)

- 40754edc72dd3e513d758153c0e2f0215897740e (Commit)
- 5f7eb6bbbe0510964e3fb1d6bb691e5445913e55 (Commit)

## Referenzen

- <https://github.com/Perl/perl5/commit/5f7eb6bbbe0510964e3fb1d6bb691e5445913e55.patch>
- <https://github.com/Perl/perl5/commit/40754edc72dd3e513d758153c0e2f0215897740e.patch>
- <http://www.openwall.com/lists/oss-security/2026/07/13/6>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-57432) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_