CVE-2023-51594 | BlueZ OBEX Library Out-Of-Bounds Read Information Disclosure Vulnerability

BlueZ OBEX Library Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of BlueZ. User interaction is required to exploit this vulnerability in that the target must connect to a malicious Bluetooth device. The specific flaw exists within the handling of OBEX protocol parameters. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of root. Was ZDI-CAN-20937.

Published: 2024-05-02 Last update: 2026-06-17 Assigner: [email protected] Source: [email protected]
NVD Status：Analyzed，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-51594 is rated Moderate Risk (43.4/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.95%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-51594

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.07% 0.95% +0.88%
2 2026-05-04 0.04% 0.07% +0.03%
3 2025-11-21 — 0.04% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-51594

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.7 3.1 MEDIUM
CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 2.1 3.6 [email protected]
2.6 3.0 LOW
CVSS:3.0/AV:A/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N Click to expand
Attack vector (AV:A)
Attacker has to be nearby on the network—same office, same link, that vibe—not the whole wide internet.
Attack complexity (AC:H)
Even with access, the exploit needs extra luck, timing, or a fussy environment to actually work.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:L)
Some sensitive info could get out, but not a total data dump.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 1.2 1.4 [email protected]

Weakness enumeration for CVE-2023-51594

OS Trackers for CVE-2023-51594

vendor priority summary link
alpine — CVE-2023-51594: 1 source package rows (bluez); 2 state rows across 2 repos (3.17-main, 3.18-main); fixed 0, open 2. https://security.alpinelinux.org/vuln/CVE-2023-51594
debian not yet assigned CVE-2023-51594 not yet assigned priority: Debian including 1 source packages (bluez), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 5. https://security-tracker.debian.org/tracker/CVE-2023-51594
redhat low — https://access.redhat.com/security/cve/CVE-2023-51594
suse low CVE-2023-51594 severity low: SUSE including 16 source package names (bluez, bluez-5.72-2.el9, …), 118 product×package rows across 37 product lines (SLES-LTSS-TERADATA 15 SP2, SUSE Liberty Linux 9, … (37 product lines)): Will Not Fix 80, Known Not Affected 33, Fixed 5. https://www.suse.com/security/cve/CVE-2023-51594/
ubuntu medium CVE-2023-51594 medium priority: Ubuntu including 1 source packages (bluez), 9 status rows across 9 suites (bionic, focal, jammy, noble, oracular, plucky, questing, upstream, xenial): deferred 6, ignored 2, needs-triage 1. https://ubuntu.com/security/CVE-2023-51594

Affected software / configurations for CVE-2023-51594

Vendor Product Version Raw CPE
bluez bluez 5.66 cpe:2.3:a:bluez:bluez:5.66:*:*:*:*:*:*:*

References for CVE-2023-51594

cvelogic Threat Intelligence