{"cve":"CVE-2022-49248","nvd":{"published":"2025-02-26T07:01:01.727","modified":"2026-06-17T05:17:30.440","status":"Analyzed","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: firewire-lib: fix uninitialized flag for AV/C deferred transaction\n\nAV/C deferred transaction was supported at a commit 00a7bb81c20f (\"ALSA:\nfirewire-lib: Add support for deferred transaction\") while 'deferrable'\nflag can be uninitialized for non-control/notify AV/C transactions.\nUBSAN reports it:\n\nkernel: ================================================================================\nkernel: UBSAN: invalid-load in /build/linux-aa0B4d/linux-5.15.0/sound/firewire/fcp.c:363:9\nkernel: load of value 158 is not a valid value for type '_Bool'\nkernel: CPU: 3 PID: 182227 Comm: irq/35-firewire Tainted: P           OE     5.15.0-18-generic #18-Ubuntu\nkernel: Hardware name: Gigabyte Technology Co., Ltd. AX370-Gaming 5/AX370-Gaming 5, BIOS F42b 08/01/2019\nkernel: Call Trace:\nkernel:  <IRQ>\nkernel:  show_stack+0x52/0x58\nkernel:  dump_stack_lvl+0x4a/0x5f\nkernel:  dump_stack+0x10/0x12\nkernel:  ubsan_epilogue+0x9/0x45\nkernel:  __ubsan_handle_load_invalid_value.cold+0x44/0x49\nkernel:  fcp_response.part.0.cold+0x1a/0x2b [snd_firewire_lib]\nkernel:  fcp_response+0x28/0x30 [snd_firewire_lib]\nkernel:  fw_core_handle_request+0x230/0x3d0 [firewire_core]\nkernel:  handle_ar_packet+0x1d9/0x200 [firewire_ohci]\nkernel:  ? handle_ar_packet+0x1d9/0x200 [firewire_ohci]\nkernel:  ? transmit_complete_callback+0x9f/0x120 [firewire_core]\nkernel:  ar_context_tasklet+0xa8/0x2e0 [firewire_ohci]\nkernel:  tasklet_action_common.constprop.0+0xea/0xf0\nkernel:  tasklet_action+0x22/0x30\nkernel:  __do_softirq+0xd9/0x2e3\nkernel:  ? irq_finalize_oneshot.part.0+0xf0/0xf0\nkernel:  do_softirq+0x75/0xa0\nkernel:  </IRQ>\nkernel:  <TASK>\nkernel:  __local_bh_enable_ip+0x50/0x60\nkernel:  irq_forced_thread_fn+0x7e/0x90\nkernel:  irq_thread+0xba/0x190\nkernel:  ? irq_thread_fn+0x60/0x60\nkernel:  kthread+0x11e/0x140\nkernel:  ? irq_thread_check_affinity+0xf0/0xf0\nkernel:  ? set_kthread_struct+0x50/0x50\nkernel:  ret_from_fork+0x22/0x30\nkernel:  </TASK>\nkernel: ================================================================================\n\nThis commit fixes the bug. The bug has no disadvantage for the non-\ncontrol/notify AV/C transactions since the flag has an effect for AV/C\nresponse with INTERIM (0x0f) status which is not used for the transactions\nin AV/C general specification.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-908"],"references":["https://git.kernel.org/stable/c/39d2c4a33dc1b4402cec68a3c8f82c6588b6edce","https://git.kernel.org/stable/c/60e5d391805d70458a01998de00d0c28cba40bf3","https://git.kernel.org/stable/c/7025f40690a235a118c87674cfb93072694aa66d","https://git.kernel.org/stable/c/7e6f5786621df060f8296f074efd275eaf20361a","https://git.kernel.org/stable/c/99582e4b19f367fa95bdd150b3034d7ce8113342"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:59:48.811064707+00:00"},"epss":{"cve":"CVE-2022-49248","score":0.00269,"percentile":0.19137,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}