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Fencer Vulns
medium 6.2

CVE-2026-86315 json

An out-of-bounds write caused by numeric truncation Samsung Open Source Escargot on Linux x86-64 allows an attacker who can supply JavaScri…

published 2026-09-07 2 mo ago modified 2026-09-28 41 d ago also EUVD-2026-72246

cvss
6.2
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.2%
EPSS 0.2% chance of exploitation in 30 days, percentile 6%
public exploits
0
none known

Summary

An out-of-bounds write caused by numeric truncation Samsung Open Source Escargot on Linux x86-64 allows an attacker who can supply JavaScript for execution to corrupt native memory and crash the host process via a crafted class definition whose instance initialization entry count exceeds UINT16_MAX.

This issue affects Escargot: 5dc93606abd42b859045add05d704a038e197359.

Patch / fix

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-86315 updated cvss 6.2

Escargot: Escargot: Out-of-bounds write leads to Denial of Service

  • Red Hat OpenShift Lightspeed openshift-lightspeed-tech-preview/lightspeed-rag-tool-rhel9 Red Hat Enterprise Linux 7 firefox, firefox 140.14.0-1.el10_2 Red Hat Enterprise Linux 8 rls, rust, cargo, clippy, rustfmt, rust-gdb, +10 more Red Hat Enterprise Linux 9 rust, cargo, clippy, firefox, rustfmt, rust-gdb, +14 more Red Hat Enterprise Linux 10 rust 1.84.1-1.el10, firefox 140.14.0-1.el10_2, virt-firmware-rs 26.1-1.el10, thunderbird 140.14.0-1.el10_2 Red Hat Enterprise Linux AI (RHEL AI) 3 rust 1.84.1-1.el10
    +2 more products
    Red Hat OpenShift Container Platform 4 conmon-rs Red Hat OpenShift Update Service openshift-update-service/openshift-update-service-rhel8
    affected: no fix available “Fix deferred”
  • Red Hat Hardened Images rust 1.84.1-1.el10, chunkah 0.6.0-3.hum1, netavark 2.1.0-1.hum1, ruff 0.15.11-1.1.hum1, aardvark-dns 2.1.0-1.hum1, openshell 0.0.100-0.2.hum1, +1 more
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
2 mo ago

Exploit prediction

0.17% chance of exploitation in the next 30 days, higher than 6% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 6.2 CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

  • Samsung Opensource Escargot

Classification

Weakness

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.