NVD / CVE Program· CNA Linux

CVE-2022-49248: ALSA: firewire-lib: fix uninitialized flag for AV/C deferred transaction

Noroxi assessment

Priority: Monitor (action score 22/100)

The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
Probability of exploitation in the next 30 days: 0.26% (FIRST EPSS).
Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
Fixed version: Linux Linux 39d2c4a33dc1b4402cec68a3c8f82c6588b6edce, 60e5d391805d70458a01998de00d0c28cba40bf3, 7025f40690a235a118c87674cfb93072694aa66d.

Low priority for now. Upgrade to Linux Linux 39d2c4a33dc1b4402cec68a3c8f82c6588b6edce, 60e5d391805d70458a01998de00d0c28cba40bf3, 7025f40690a235a118c87674cfb93072694aa66d or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 5.5 · v3.1—No exploit Fix available

Published: Feb 26, 2025
Updated: Jun 17, 2026
EPSS: 0.2% · 18th percentile
CWE: CWE-908

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Action score

Monitor

Low priority for now.

CVSS: 22 / 40 · 5.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.2%

Get told when this record changes

Not in KEV: no record of exploitation in the wild
No public exploit code on record
A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

linux linux kernel3.16 and later · before 4.9.311
linux linux kernel4.10 and later · before 4.14.276
linux linux kernel4.15 and later · before 4.19.238
linux linux kernel4.20 and later · before 5.4.189
linux linux kernel5.5 and later · before 5.10.110
linux linux kernel5.11 and later · before 5.15.33
linux linux kernel5.16 and later · before 5.16.19
linux linux kernel5.17 and later · before 5.17.2

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

Linux Linux
- 3.16affected
- 00a7bb81c20f3e81711e28e0f6c08cee8fd18514 and later · before 99582e4b19f367fa95bdd150b3034d7ce8113342affected · git
- 00a7bb81c20f3e81711e28e0f6c08cee8fd18514 and later · before b2b65c9013dc28836d82e25d0f0c94d794a14abaaffected · git
- 00a7bb81c20f3e81711e28e0f6c08cee8fd18514 and later · before 60e5d391805d70458a01998de00d0c28cba40bf3affected · git
- 00a7bb81c20f3e81711e28e0f6c08cee8fd18514 and later · before 7025f40690a235a118c87674cfb93072694aa66daffected · git
- 00a7bb81c20f3e81711e28e0f6c08cee8fd18514 and later · before 7e6f5786621df060f8296f074efd275eaf20361aaffected · git
- 00a7bb81c20f3e81711e28e0f6c08cee8fd18514 and later · before eab74c41612083bd627b60da650e19234e4f1051affected · git
- 00a7bb81c20f3e81711e28e0f6c08cee8fd18514 and later · before d07e4bbaff6fbba6f70c04b092ea7d9afcdf392eaffected · git
- 00a7bb81c20f3e81711e28e0f6c08cee8fd18514 and later · before 39d2c4a33dc1b4402cec68a3c8f82c6588b6edceaffected · git
- 00a7bb81c20f3e81711e28e0f6c08cee8fd18514 and later · before bf0cd60b7e33cf221fbe1114e4acb2c828b0af0daffected · git

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Ecosystem	Package	Affected range	Fix
Debian:12	linux	before 5.17.3-1	5.17.3-1
SUSE:Linux Enterprise Live Patching 12 SP5	kernel-default	before 4.12.14-122.261.1	4.12.14-122.261.1
SUSE:Linux Enterprise Live Patching 12 SP5	kgraft-patch-SLE12-SP5_Update_69	before 1-8.3.1	1-8.3.1
SUSE:Linux Enterprise Server 12 SP5-LTSS	kernel-source	before 4.12.14-122.261.1	4.12.14-122.261.1
SUSE:Linux Enterprise Server 12 SP5-LTSS	kernel-syms	before 4.12.14-122.261.1	4.12.14-122.261.1

Same product

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Published before and after this one in the same product

← EarlierCVE-2022-49246Feb 26, 2025 · ASoC: atmel: Fix error handling in snd_proto_probe
22Monitor
← EarlierCVE-2022-49247Feb 26, 2025 · media: stk1160: If start stream fails, return buffers with VB2_BUF_STATE_QUEUED
22Monitor
Later →CVE-2022-49249Feb 26, 2025 · ASoC: codecs: wc938x: fix accessing array out of bounds for enum type
28Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Linux Linux	39d2c4a33dc1b4402cec68a3c8f82c6588b6edce	Vendor (CNA)
Linux Linux	60e5d391805d70458a01998de00d0c28cba40bf3	Vendor (CNA)
Linux Linux	7025f40690a235a118c87674cfb93072694aa66d	Vendor (CNA)
Linux Linux	7e6f5786621df060f8296f074efd275eaf20361a	Vendor (CNA)
Linux Linux	99582e4b19f367fa95bdd150b3034d7ce8113342	Vendor (CNA)
Linux Linux	b2b65c9013dc28836d82e25d0f0c94d794a14aba	Vendor (CNA)
Linux Linux	bf0cd60b7e33cf221fbe1114e4acb2c828b0af0d	Vendor (CNA)
Linux Linux	d07e4bbaff6fbba6f70c04b092ea7d9afcdf392e	Vendor (CNA)
Linux Linux	eab74c41612083bd627b60da650e19234e4f1051	Vendor (CNA)
debian:linux	5.17.3-1 · Debian:12	Package registry (OSV)
suse:kernel-default	4.12.14-122.261.1 · SUSE:Linux Enterprise Live Patching 12 SP5	Package registry (OSV)
suse:kernel-source	4.12.14-122.261.1 · SUSE:Linux Enterprise Server 12 SP5-LTSS	Package registry (OSV)
suse:kernel-syms	4.12.14-122.261.1 · SUSE:Linux Enterprise Server 12 SP5-LTSS	Package registry (OSV)
suse:kgraft-patch-SLE12-SP5_Update_69	1-8.3.1 · SUSE:Linux Enterprise Live Patching 12 SP5	Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

CVE-2024-5030299 days apartHID: core: zero-initialize the report bufferKEV
52Plan
CVE-2026-52989483 days apartnvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers
39Monitor
CVE-2024-47685128 days apartnetfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put()
36Monitor
CVE-2026-53225484 days apartsctp: fix uninit-value in __sctp_rcv_asconf_lookup()
36Monitor
CVE-2026-53170484 days apartaccel/ethosu: reject DMA commands with uninitialized length
35Monitor
CVE-2026-43139434 days apartxfrm6: fix uninitialized saddr in xfrm6_get_saddr()
34Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

Someone with local access to the system can trigger it.
A low-privileged account is enough.
No user action is required.
No special conditions are required; it is repeatable.

If successful

Confidentiality: none
Integrity: none
Availability: high · the service can be disrupted

Attack vector: Local
Attack complexity: Low
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

Weakness class (CWE)

CWE-908 · Use of Uninitialized Resource

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

Fix✗ → ✓Sep 28, 2026, 10:09 PM UTC

For records you follow, these changes also arrive as notifications. →

References

git.kernel.org/stable/c/39d2c4a33dc1b4402cec68a3c8f82c6588b6edce

Show all references (8 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records