CVE-2024-7540

Description

oFono AT CMGL Command Uninitialized Variable Information Disclosure Vulnerability. This vulnerability allows local attackers to disclose sensitive information on affected installations of oFono. An attacker must first obtain the ability to execute code on the target modem in order to exploit this vulnerability. The specific flaw exists within the parsing of responses from AT+CMGL commands. The issue results from the lack of proper initialization of memory prior to accessing it. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of root. Was ZDI-CAN-23307.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
ofono	25.10 questing	Not affected
	25.04 plucky	Ignored end of life, was needs-triage
	24.10 oracular	Ignored end of life, was needs-triage
	24.04 LTS noble	Fixed 1.31-3ubuntu3.24.04.2+esm1
	22.04 LTS jammy	Fixed 1.31-3ubuntu1.2+esm1
	20.04 LTS focal	Fixed 1.31-2ubuntu1+esm3
	18.04 LTS bionic	Fixed 1.21-1ubuntu1+esm3
	16.04 LTS xenial	Fixed 1.17.bzr6912+16.04.20160314.3-0ubuntu1+esm3

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Notes

bruce

No available patch as of 2024-12-10. Current mitigation is to restrict access with the application.

allenpthuang

Patches have been made available as of 2026-04-02. Ubuntu's default compiler flags mitigate stack-based buffer overflows. Set the priority to Medium.

Severity score breakdown

Parameter	Value
Base score	3.3 · Low
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	Low
Integrity impact	None
Availability impact	None
Vector	CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

References

Related Ubuntu Security Notices (USN)

USN-8178-1
oFono vulnerabilities
16 April 2026

Cvss 3 Severity Score