5.5

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

Analyzed
AliasesUBUNTU-CVE-2022-49248DEBIAN-CVE-2022-49248
Published 26-02-2025Last modified 11-05-2026

Vulnerability summary

CVE-2022-49248 is a medium (CVSS 5.5) Use of Uninitialized Resource vulnerability in linux. EPSS estimates a 0.27% chance of exploitation in the next 30 days, higher than 19.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.27%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 7 · Related 7
SUSE-SU-2025:01983-1SUSE-SU-2025:1027-1SUSE-SU-2025:1176-1SUSE-SU-2025:1183-1SUSE-SU-2025:1194-1SUSE-SU-2025:1241-1

Timeline

  1. 26-02-2025
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

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.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.27%

Chance of exploitation in the next 30 days

Percentile

19%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.27% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu106 products
  • linuxAll versions (No fix recorded) | < 4.15.0-189.200 | < 5.4.0-117.132 | < 5.15.0-37.39
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1137.148 | < 5.4.0-1078.84 | < 5.15.0-1011.14
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 00a7bb81c20f3e81711e28e0f6c08cee8fd18514, < 99582e4b19f367fa95bdd150b3034d7ce8113342 | ≥ 00a7bb81c20f3e81711e28e0f6c08cee8fd18514, < b2b65c9013dc28836d82e25d0f0c94d794a14aba | ≥ 00a7bb81c20f3e81711e28e0f6c08cee8fd18514, < 60e5d391805d70458a01998de00d0c28cba40bf3 | ≥ 00a7bb81c20f3e81711e28e0f6c08cee8fd18514, < 7025f40690a235a118c87674cfb93072694aa66d | ≥ 00a7bb81c20f3e81711e28e0f6c08cee8fd18514, < 7e6f5786621df060f8296f074efd275eaf20361a | ≥ 00a7bb81c20f3e81711e28e0f6c08cee8fd18514, < eab74c41612083bd627b60da650e19234e4f1051 | ≥ 00a7bb81c20f3e81711e28e0f6c08cee8fd18514, < d07e4bbaff6fbba6f70c04b092ea7d9afcdf392e | ≥ 00a7bb81c20f3e81711e28e0f6c08cee8fd18514, < 39d2c4a33dc1b4402cec68a3c8f82c6588b6edce | ≥ 00a7bb81c20f3e81711e28e0f6c08cee8fd18514, < bf0cd60b7e33cf221fbe1114e4acb2c828b0af0d | 3.16
  • linux_kernel≥ 3.16, < 4.9.311 | ≥ 4.10, < 4.14.276 | ≥ 4.15, < 4.19.238 | ≥ 4.20, < 5.4.189 | ≥ 5.5, < 5.10.110 | ≥ 5.11, < 5.15.33 | ≥ 5.16, < 5.16.19 | ≥ 5.17, < 5.17.2
Debian1 product
  • linux< 5.17.3-1

3 vendors · 109 products

References

13 links
Show all 13 references