🛡️ CVE-2023-4255 — extra-packages-for-enterprise-linux

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

• Attack vector: Local — a local account, shell or session on the host is needed.
• Attack complexity: Low — the attack works reliably, with no preparation.
• Privileges required: None — an unauthenticated stranger can try it.
• User interaction: Required — someone has to click, open or visit something.
• Scope: Unchanged — the damage stays inside the vulnerable component.
• Confidentiality impact: None.
• Integrity impact: None.
• Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2023-4255 is classified as CWE-787: Out-of-bounds Write. Data is written past the end or before the start of a buffer, corrupting whatever is stored there.

Affected software

CVE-2023-4255 is recorded against 3 packages.

• extra-packages-for-enterprise-linux
• fedora
• w3m

Timeline and source

Published on 21 December 2023 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. A vendor advisory or fix has been published. Record sourced from NVD.

References

bugzilla.redhat.com
github.com
github.com
github.com
lists.fedoraproject.org
lists.fedoraproject.org
lists.fedoraproject.org
bugzilla.redhat.com
github.com
github.com
github.com
lists.fedoraproject.org
lists.fedoraproject.org
lists.fedoraproject.org

Other advisories for this package

extra-packages-for-enterprise-linux has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CVE-2024-0232 (4.7 Medium, published 16 Jan 2024)
• CVE-2023-6395 (6.7 Medium, published 16 Jan 2024)
• CVE-2023-51766 (5.3 Medium, published 24 Dec 2023)
• CVE-2023-4256 (5.5 Medium, published 21 Dec 2023)
• CVE-2023-5764 (7.1 High, published 12 Dec 2023)
• CVE-2023-5341 (6.2 Medium, published 19 Nov 2023)
• CVE-2023-5545 (3.3 Low, published 9 Nov 2023)
• CVE-2023-5543 (3.3 Low, published 9 Nov 2023)

Same weakness in other software

These advisories are the same class of weakness (CWE-787: Out-of-bounds Write) in other software:

• CVE-2018-5268 (published 9 Jul 2026)
• CVE-2017-12606 (8.0 High, published 9 Jul 2026)
• CVE-2019-5063 (8.0 High, published 9 Jul 2026)
• CVE-2017-12605 (8.0 High, published 9 Jul 2026)
• CVE-2022-29208 (8.0 High, published 9 Jul 2026)
• CVE-2022-23561 (8.0 High, published 9 Jul 2026)
• CVE-2019-9423 (8.0 High, published 9 Jul 2026)
• CVE-2017-12603 (8.0 High, published 2 Jul 2026)

CVE-2023-4255 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Affected Packages

References