🛡️ CVE-2023-23902 — ur32l-firmware

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity high, availability high.

CVSS metrics in full

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

• Attack vector: Network — reachable from anywhere that can route to the service.
• Attack complexity: Low — the attack works reliably, with no preparation.
• Privileges required: None — an unauthenticated stranger can try it.
• User interaction: None — nobody has to be tricked into anything.
• Scope: Unchanged — the damage stays inside the vulnerable component.
• Confidentiality impact: High — total loss, or loss the attacker controls.
• Integrity impact: High — total loss, or loss the attacker controls.
• Availability impact: High — total loss, or loss the attacker controls.

Weakness class

CVE-2023-23902 is classified as CWE-121: Stack-based Buffer Overflow. An oversized write to a stack buffer overwrites saved state such as return addresses, which can redirect execution.

Affected software

CVE-2023-23902 is recorded against 1 package.

• ur32l-firmware

Timeline and source

Published on 6 July 2023 and last revised on 17 June 2026. A public exploit is known to exist, which raises the urgency of patching considerably. Record sourced from NVD.

References

talosintelligence.com
talosintelligence.com
www.talosintelligence.com

Other advisories for this package

ur32l-firmware has other advisories on record. If you are patching this one, these are worth checking on the same host:

• CVE-2023-47166 (8.8 High, published 1 May 2024)
• CVE-2023-43260 (6.1 Medium, published 5 Oct 2023)
• CVE-2023-43261 (7.5 High, published 4 Oct 2023)
• CVE-2023-25090 (7.2 High, published 6 Jul 2023)
• CVE-2023-25122 (7.2 High, published 6 Jul 2023)
• CVE-2023-24520 (8.8 High, published 6 Jul 2023)
• CVE-2023-25109 (7.2 High, published 6 Jul 2023)
• CVE-2023-25096 (7.2 High, published 6 Jul 2023)

Same weakness in other software

These advisories are the same class of weakness (CWE-121: Stack-based Buffer Overflow) in other software:

• CVE-2023-28760 (7.5 High, published 2 Oct 2025)
• CVE-2022-32502 (6.3 Medium, published 14 May 2024)
• CVE-2023-32136 (8.8 High, published 3 May 2024)
• CVE-2023-27346 (8.8 High, published 3 May 2024)
• CVE-2023-32149 (8.8 High, published 3 May 2024)
• CVE-2023-27333 (6.8 Medium, published 3 May 2024)
• CVE-2023-32146 (8.8 High, published 3 May 2024)
• CVE-2023-27332 (8.8 High, published 3 May 2024)

Details

Affected Packages

References