CVE-2023-6859

Exploitation

Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.

SSVC decision

Not assessed by CISA

EPSS probability

1.09% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 63.1% of scored records. A rank, not a probability.

NVD base score

8.8 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

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

NVD analysis status

Modified. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

Published

2023-12-19 13:38Z2 YR AGO

Last updated

2025-02-13 17:26Z1 YR AGO

Reserved

2023-12-15

Assigning CNA

mozilla

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-416Use After FreeVariant

Data version

5.1

Document digest

476594787476e54ef9b0d365d9cf70786b487fdb7e398406c8878955d19d6c02

• bugzilla.mozilla.orghttps://bugzilla.mozilla.org/show_bug.cgi?id=1840144
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2023-54/
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2023-55/
• www.mozilla.orghttps://www.mozilla.org/security/advisories/mfsa2023-56/
• www.debian.orghttps://www.debian.org/security/2023/dsa-5581
• www.debian.orghttps://www.debian.org/security/2023/dsa-5582
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2023/12/msg00020.html
• lists.debian.orghttps://lists.debian.org/debian-lts-announce/2023/12/msg00021.html
• security.gentoo.orghttps://security.gentoo.org/glsa/202401-10