CVE-2022-49248

ALSA: firewire-lib: fix uninitialized flag for AV/C deferred transaction

Severity Score

"-"

*CVSS v-

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

MITRE

In the Linux kernel, the following vulnerability has been resolved: ALSA: firewire-lib: fix uninitialized flag for AV/C deferred transaction AV/C deferred transaction was supported at a commit 00a7bb81c20f ("ALSA:
firewire-lib: Add support for deferred transaction") while 'deferrable'
flag can be uninitialized for non-control/notify AV/C transactions.
UBSAN reports it: kernel: ================================================================================
kernel: UBSAN: invalid-load in /build/linux-aa0B4d/linux-5.15.0/sound/firewire/fcp.c:363:9
kernel: load of value 158 is not a valid value for type '_Bool'
kernel: CPU: 3 PID: 182227 Comm: irq/35-firewire Tainted: P OE 5.15.0-18-generic #18-Ubuntu
kernel: Hardware name: Gigabyte Technology Co., Ltd. AX370-Gaming 5/AX370-Gaming 5, BIOS F42b 08/01/2019
kernel: Call Trace:
kernel: <IRQ>
kernel: show_stack+0x52/0x58
kernel: dump_stack_lvl+0x4a/0x5f
kernel: dump_stack+0x10/0x12
kernel: ubsan_epilogue+0x9/0x45
kernel: __ubsan_handle_load_invalid_value.cold+0x44/0x49
kernel: fcp_response.part.0.cold+0x1a/0x2b [snd_firewire_lib]
kernel: fcp_response+0x28/0x30 [snd_firewire_lib]
kernel: fw_core_handle_request+0x230/0x3d0 [firewire_core]
kernel: handle_ar_packet+0x1d9/0x200 [firewire_ohci]
kernel: ? handle_ar_packet+0x1d9/0x200 [firewire_ohci]
kernel: ? transmit_complete_callback+0x9f/0x120 [firewire_core]
kernel: ar_context_tasklet+0xa8/0x2e0 [firewire_ohci]
kernel: tasklet_action_common.constprop.0+0xea/0xf0
kernel: tasklet_action+0x22/0x30
kernel: __do_softirq+0xd9/0x2e3
kernel: ? irq_finalize_oneshot.part.0+0xf0/0xf0
kernel: do_softirq+0x75/0xa0
kernel: </IRQ>
kernel: <TASK>
kernel: __local_bh_enable_ip+0x50/0x60
kernel: irq_forced_thread_fn+0x7e/0x90
kernel: irq_thread+0xba/0x190
kernel: ? irq_thread_fn+0x60/0x60
kernel: kthread+0x11e/0x140
kernel: ? irq_thread_check_affinity+0xf0/0xf0
kernel: ? set_kthread_struct+0x50/0x50
kernel: ret_from_fork+0x22/0x30
kernel: </TASK>
kernel: ================================================================================ This commit fixes the bug. The bug has no disadvantage for the non-
control/notify AV/C transactions since the flag has an effect for AV/C
response with INTERIM (0x0f) status which is not used for the transactions
in AV/C general specification.

*Credits: N/A

CVSS Scores

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Attack Complexity

Privileges Required

User Interaction

Scope

Confidentiality

Integrity

Availability

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2025-02-26 CVE Reserved
2025-02-26 CVE Published
2025-02-26 CVE Updated
---------- EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CAPEC

References (10)

URL	Tag	Source
https://git.kernel.org/stable/c/00a7bb81c20f3e81711e28e0f6c08cee8fd18514	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/99582e4b19f367fa95bdd150b3034d7ce8113342	2022-04-20
https://git.kernel.org/stable/c/b2b65c9013dc28836d82e25d0f0c94d794a14aba	2022-04-20
https://git.kernel.org/stable/c/60e5d391805d70458a01998de00d0c28cba40bf3	2022-04-15
https://git.kernel.org/stable/c/7025f40690a235a118c87674cfb93072694aa66d	2022-04-15
https://git.kernel.org/stable/c/7e6f5786621df060f8296f074efd275eaf20361a	2022-04-08
https://git.kernel.org/stable/c/eab74c41612083bd627b60da650e19234e4f1051	2022-04-08
https://git.kernel.org/stable/c/d07e4bbaff6fbba6f70c04b092ea7d9afcdf392e	2022-04-08
https://git.kernel.org/stable/c/39d2c4a33dc1b4402cec68a3c8f82c6588b6edce	2022-04-08
https://git.kernel.org/stable/c/bf0cd60b7e33cf221fbe1114e4acb2c828b0af0d	2022-03-04

URL	Date	SRC

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.16 < 4.9.311 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 4.9.311"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.16 < 4.14.276 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 4.14.276"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.16 < 4.19.238 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 4.19.238"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.16 < 5.4.189 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 5.4.189"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.16 < 5.10.110 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 5.10.110"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.16 < 5.15.33 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 5.15.33"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.16 < 5.16.19 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 5.16.19"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.16 < 5.17.2 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 5.17.2"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 3.16 < 5.18 Search vendor "Linux" for product "Linux Kernel" and version " >= 3.16 < 5.18"		en		Affected