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Vulnerability · Published Feb 26, 2025 · Assigned by Linux

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

Medium 5.5

In plain English

A medium-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.3%top 80.8% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux5.17.3-1DEBIAN-CVE-2022-49248
Debian:13linux5.17.3-1DEBIAN-CVE-2022-49248
Debian:14linux5.17.3-1DEBIAN-CVE-2022-49248
Ubuntu:22.04:LTSlinux5.15.0-37.39UBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-aws5.15.0-1011.14UBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-azure5.15.0-1010.12UBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-gcp5.15.0-1008.12UBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-gke5.15.0-1008.10UBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-ibm5.15.0-1007.8UBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1008.11UBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-kvm5.15.0-1010.11UBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-37.39UBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-oracle5.15.0-1009.12UBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-raspi5.15.0-1011.13UBUNTU-CVE-2022-49248
Ubuntu:24.04:LTSlinux-raspi-realtimeno fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2022-49248
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2022-49248

Affected products (as reported)

VendorProductVersions
Linux Linux 00a7bb81c20f3e81711e28e0f6c08cee8fd18514 – before 99582e4b19f367fa95bdd150b3034d7ce811334200a7bb81c20f3e81711e28e0f6c08cee8fd18514 – before b2b65c9013dc28836d82e25d0f0c94d794a14aba00a7bb81c20f3e81711e28e0f6c08cee8fd18514 – before 60e5d391805d70458a01998de00d0c28cba40bf300a7bb81c20f3e81711e28e0f6c08cee8fd18514 – before 7025f40690a235a118c87674cfb93072694aa66d00a7bb81c20f3e81711e28e0f6c08cee8fd18514 – before 7e6f5786621df060f8296f074efd275eaf20361a00a7bb81c20f3e81711e28e0f6c08cee8fd18514 – before eab74c41612083bd627b60da650e19234e4f105100a7bb81c20f3e81711e28e0f6c08cee8fd18514 – before d07e4bbaff6fbba6f70c04b092ea7d9afcdf392e00a7bb81c20f3e81711e28e0f6c08cee8fd18514 – before 39d2c4a33dc1b4402cec68a3c8f82c6588b6edce
Linux Linux 3.16

References