cbcvebase.
CVE-2022-50773
published 2025-12-24

CVE-2022-50773: In the Linux kernel, the following vulnerability has been resolved: ALSA: mts64: fix possible null-ptr-defer in snd_mts64_interrupt I got a null-ptr-defer…

PriorityP420low5.5
EPSS
0.25%
16.2th percentile
In the Linux kernel, the following vulnerability has been resolved: ALSA: mts64: fix possible null-ptr-defer in snd_mts64_interrupt I got a null-ptr-defer error report when I do the following tests on the qemu platform: make defconfig and CONFIG_PARPORT=m, CONFIG_PARPORT_PC=m, CONFIG_SND_MTS64=m Then making test scripts: cat>test_mod1.sh snd_mts64_interrupt+0x24/0xa0 [snd_mts64] parport_irq_handler+0x37/0x50 [parport] __handle_irq_event_percpu+0x39/0x190 handle_irq_event_percpu+0xa/0x30 handle_irq_event+0x2f/0x50 handle_edge_irq+0x99/0x1b0 __common_interrupt+0x5d/0x100 common_interrupt+0xa0/0xc0 asm_common_interrupt+0x22/0x40 RIP: 0010:_raw_write_unlock_irqrestore+0x11/0x30 parport_claim+0xbd/0x230 [parport] snd_mts64_probe+0x14a/0x465 [snd_mts64] platform_probe+0x3f/0xa0 really_probe+0x129/0x2c0 __driver_probe_device+0x6d/0xc0 driver_probe_device+0x1a/0xa0 __device_attach_driver+0x7a/0xb0 bus_for_each_drv+0x62/0xb0 __device_attach+0xe4/0x180 bus_probe_device+0x82/0xa0 device_add+0x550/0x920 platform_device_add+0x106/0x220 snd_mts64_attach+0x2e/0x80 [snd_mts64] port_check+0x14/0x20 [parport] bus_for_each_dev+0x6e/0xc0 __parport_register_driver+0x7c/0xb0 [parport] snd_mts64_module_init+0x31/0x1000 [snd_mts64] do_one_initcall+0x3c/0x1f0 do_init_module+0x46/0x1c6 load_module+0x1d8d/0x1e10 __do_sys_finit_module+0xa2/0xf0 do_syscall_64+0x37/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd Kernel panic - not syncing: Fatal exception in interrupt Rebooting in 1 seconds.. The mts wa not initialized during interrupt, we add check for mts to fix this bug.

Affected

23 ranges
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.4-1 (bookworm)linux 6.1.4-1 (bookworm)
linuxlinux——
linuxlinux>= 68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad < 06ec592389f2be3199779ab823c4323dcfd2121f06ec592389f2be3199779ab823c4323dcfd2121f
linuxlinux>= 68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad < b471fe61da523a15e4cb60fa81f5a2377e4bad98b471fe61da523a15e4cb60fa81f5a2377e4bad98
linuxlinux>= 68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad < 7e91667db38abb056da5a496d40fbd044c66bed27e91667db38abb056da5a496d40fbd044c66bed2
linuxlinux>= 68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad < c7e9624d90bf20f1eed6b228949396d614b94020c7e9624d90bf20f1eed6b228949396d614b94020
linuxlinux>= 68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad < 0649129359219ce6ff380ec401f87308485c6ae30649129359219ce6ff380ec401f87308485c6ae3
linuxlinux>= 68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad < cba633b24a98d957e8190ef8bc4d4cdb4f6e9313cba633b24a98d957e8190ef8bc4d4cdb4f6e9313
linuxlinux>= 68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad < 1a763c748acd5540ccc43306c57c9c6c5fb608841a763c748acd5540ccc43306c57c9c6c5fb60884
linuxlinux>= 68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad < 250eed7b9994d79f9c409f954dbd08e88f5afd83250eed7b9994d79f9c409f954dbd08e88f5afd83
linuxlinux>= 68ab801e32bbe2caac8b8c6e6e94f41fe7d687ad < cf2ea3c86ad90d63d1c572b43e1ca9276b0357adcf2ea3c86ad90d63d1c572b43e1ca9276b0357ad
linuxlinux_kernel>= 0 < 5.10.178-15.10.178-1
linuxlinux_kernel>= 0 < 6.1.4-16.1.4-1
linuxlinux_kernel>= 0 < 6.1.4-16.1.4-1
linuxlinux_kernel>= 0 < 6.1.4-16.1.4-1
linuxlinux_kernel>= 2.6.19 < 4.9.3374.9.337
linuxlinux_kernel>= 4.10.0 < 4.14.3034.14.303
linuxlinux_kernel>= 4.15.0 < 4.19.2704.19.270
linuxlinux_kernel>= 4.20.0 < 5.4.2295.4.229
linuxlinux_kernel>= 5.11.0 < 5.15.865.15.86
linuxlinux_kernel>= 5.16.0 < 6.0.166.0.16
linuxlinux_kernel>= 5.5.0 < 5.10.1635.10.163
linuxlinux_kernel>= 6.1.0 < 6.1.26.1.2
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