Bug 2147356 (CVE-2022-42895)

Summary:	CVE-2022-42895 kernel: Information leak in l2cap_parse_conf_req in net/bluetooth/l2cap_core.c
Product:	[Other] Security Response	Reporter:	Pedro Sampaio <psampaio>
Component:	vulnerability	Assignee:	Nobody <nobody>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, bhu, chwhite, ddepaula, debarbos, dvlasenk, ezulian, hkrzesin, jarod, jburrell, jfaracco, jferlan, jforbes, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, kernel-mgr, kyoshida, lgoncalv, lleshchi, lzampier, nmurray, ptalbert, qzhao, rvrbovsk, scweaver, swood, tyberry, vkumar, walters, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 6.1-rc4	Doc Type:	If docs needed, set a value
Doc Text:	An information leak vulnerability was found in the Linux kernel's implementation of logical link control and adaptation protocol (L2CAP), part of the Bluetooth stack in the l2cap_parse_conf_req function. An attacker with physical access within the range of standard Bluetooth transmission could use this flaw to leak kernel pointers via Bluetooth if within proximity of the victim.	Story Points:	---
Clone Of:		Environment:
Last Closed:		Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2148406, 2148407, 2148408, 2148409, 2147358
Bug Blocks:	2142956

Description Pedro Sampaio 2022-11-23 19:19:36 UTC

There is an infoleak vulnerability in the Linux kernel's net/bluetooth/l2cap_core.c's l2cap_parse_conf_req function which can be used to leak kernel pointers remotely.

References:

https://kernel.dance/#b1a2cd50c0357f243b7435a732b4e62ba3157a2e
https://github.com/torvalds/linux/commit/b1a2cd50c0357f243b7435a732b4e62ba3157a2e

Comment 1 Pedro Sampaio 2022-11-23 19:20:16 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2147358]

Comment 5 Justin M. Forbes 2022-11-30 20:24:40 UTC

This was fixed for Fedora with the 6.0.8 stable kernel updates.