CVE-2023-53045— usb: gadget: u_audio: don't let userspace block driver unbind
Affected Version Matrix 18
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 132fcb460839a876f5bc8b71bede60f8d0875757< 3e016ef2e72da93a2ea7afbb45de1b481b44d761 | affected |
132fcb460839a876f5bc8b71bede60f8d0875757< 3256e152b645fc1e788ba44c2d8ced690113e3e6 | affected | ||
132fcb460839a876f5bc8b71bede60f8d0875757< 0eda2004f38d95ef5715d62be884cd344260535b | affected | ||
132fcb460839a876f5bc8b71bede60f8d0875757< 33f341c1fc60e172a3515c51bdabee11e83d1ee9 | affected | ||
132fcb460839a876f5bc8b71bede60f8d0875757< b131989797f7287d7fdadb2bababc05a15d44750 | affected | ||
132fcb460839a876f5bc8b71bede60f8d0875757< 3bc7324e4911351e39c54a62e6ca46321cb10faf | affected | ||
132fcb460839a876f5bc8b71bede60f8d0875757< 43ca70753dfffd517d2af126da28690f8f615605 | affected | ||
132fcb460839a876f5bc8b71bede60f8d0875757< 6c67ed9ad9b83e453e808f9b31a931a20a25629b | affected | ||
| … +10 more rows | |||
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I. Basic Information for CVE-2023-53045
Vulnerability Information
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Vulnerability Title
usb: gadget: u_audio: don't let userspace block driver unbind
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: u_audio: don't let userspace block driver unbind In the unbind callback for f_uac1 and f_uac2, a call to snd_card_free() via g_audio_cleanup() will disconnect the card and then wait for all resources to be released, which happens when the refcount falls to zero. Since userspace can keep the refcount incremented by not closing the relevant file descriptor, the call to unbind may block indefinitely. This can cause a deadlock during reboot, as evidenced by the following blocked task observed on my machine: task:reboot state:D stack:0 pid:2827 ppid:569 flags:0x0000000c Call trace: __switch_to+0xc8/0x140 __schedule+0x2f0/0x7c0 schedule+0x60/0xd0 schedule_timeout+0x180/0x1d4 wait_for_completion+0x78/0x180 snd_card_free+0x90/0xa0 g_audio_cleanup+0x2c/0x64 afunc_unbind+0x28/0x60 ... kernel_restart+0x4c/0xac __do_sys_reboot+0xcc/0x1ec __arm64_sys_reboot+0x28/0x30 invoke_syscall+0x4c/0x110 ... The issue can also be observed by opening the card with arecord and then stopping the process through the shell before unbinding: # arecord -D hw:UAC2Gadget -f S32_LE -c 2 -r 48000 /dev/null Recording WAVE '/dev/null' : Signed 32 bit Little Endian, Rate 48000 Hz, Stereo ^Z[1]+ Stopped arecord -D hw:UAC2Gadget -f S32_LE -c 2 -r 48000 /dev/null # echo gadget.0 > /sys/bus/gadget/drivers/configfs-gadget/unbind (observe that the unbind command never finishes) Fix the problem by using snd_card_free_when_closed() instead, which will still disconnect the card as desired, but defer the task of freeing the resources to the core once userspace closes its file descriptor.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于u_audio驱动未正确处理用户空间引用，可能导致死锁。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2023-53045
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|---|
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Patches & Fixes for CVE-2023-53045 (7)
Other References for CVE-2023-53045 (1)
Same Patch Batch · Linux · 2025-05-02 · 107 CVEs total
| CVE-2023-53102 | ice: xsk: disable txq irq before flushing hw | |
| CVE-2023-53115 | scsi: mpi3mr: Fix memory leaks in mpi3mr_init_ioc() | |
| CVE-2023-53114 | i40e: Fix kernel crash during reboot when adapter is in recovery mode | |
| CVE-2023-53112 | drm/i915/sseu: fix max_subslices array-index-out-of-bounds access | |
| CVE-2023-53113 | wifi: nl80211: fix NULL-ptr deref in offchan check | |
| CVE-2023-53111 | loop: Fix use-after-free issues | |
| CVE-2023-53109 | net: tunnels: annotate lockless accesses to dev->needed_headroom | |
| CVE-2023-53110 | net/smc: fix NULL sndbuf_desc in smc_cdc_tx_handler() | |
| CVE-2023-53108 | net/iucv: Fix size of interrupt data | |
| CVE-2023-53106 | nfc: st-nci: Fix use after free bug in ndlc_remove due to race condition | |
| CVE-2023-53107 | veth: Fix use after free in XDP_REDIRECT | |
| CVE-2023-53105 | net/mlx5e: Fix cleanup null-ptr deref on encap lock | |
| CVE-2023-53103 | bonding: restore bond's IFF_SLAVE flag if a non-eth dev enslave fails | |
| CVE-2023-53101 | ext4: zero i_disksize when initializing the bootloader inode | |
| CVE-2023-53091 | ext4: update s_journal_inum if it changes after journal replay | |
| CVE-2023-53094 | tty: serial: fsl_lpuart: fix race on RX DMA shutdown | |
| CVE-2023-53092 | interconnect: exynos: fix node leak in probe PM QoS error path | |
| CVE-2023-53093 | tracing: Do not let histogram values have some modifiers | |
| CVE-2023-53095 | drm/ttm: Fix a NULL pointer dereference | |
| CVE-2023-53090 | drm/amdkfd: Fix an illegal memory access |
Showing top 20 of 107 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
V. Comments for CVE-2023-53045
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