{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2022-49545","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2025-02-26T02:08:31.590Z","datePublished":"2025-02-26T02:13:58.363Z","dateUpdated":"2026-08-05T08:55:37.233Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T08:55:37.233Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: usb-audio: Cancel pending work at closing a MIDI substream\n\nAt closing a USB MIDI output substream, there might be still a pending\nwork, which would eventually access the rawmidi runtime object that is\nbeing released.  For fixing the race, make sure to cancel the pending\nwork at closing."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7.8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - Triggered via local ALSA/OSS MIDI character devices (/dev/snd/midi*, /dev/sequencer) once a USB MIDI interface is bound; device presence is an environmental precondition, not a malicious-USB physical attack (same model as CVE-2024-44954 / CVE-2022-50719).\nAC:L - The attacker controls both sides of the race by writing MIDI data to queue snd_usbmidi_out_work and then closing/unsubscribing the substream to free the runtime, so success does not depend on external timing.\nPR:L - Only ordinary access to sound devices is required, which seat users get via udev uaccess ACLs or audio group membership; no CAP_SYS_ADMIN or root is needed.\nUI:N - The attacker opens the MIDI/sequencer device, writes to queue work, and closes it themselves; no separate victim action is required.\nS:U - The UAF and any resulting privilege escalation remain within the host kernel's security authority; this is not a VM escape or IOMMU/DMA boundary bypass.\nC:H - Use-after-free of the kmalloc-512 snd_rawmidi_runtime lets an attacker reclaim the object and steer subsequent reads in __snd_rawmidi_transmit_ack / transmit paths into attacker-controlled memory.\nI:H - The same reclaimable UAF is written (hw_ptr, avail, wake_up on runtime->sleep) from the workqueue path, enabling heap corruption and control-flow hijack primitives.\nA:H - Even without controlled reclaim, the pending work dereferencing the freed runtime reliably causes a KASAN-detected use-after-free / kernel oops, so Availability is High."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/midi.c"],"versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"40bdb5ec957aca5c5c1924602bef6b0ab18e22d3","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"11868ca21585561659c2575b0d6508ef8e9c4291","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"5e5fe2b6065541c6216a7a003b0cddf386be0d2d","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"517dcef4d2dda0132648f1e4c079ed17bba4d1a4","status":"affected","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","lessThan":"0125de38122f0f66bf61336158d12a1aabfe6425","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/usb/midi.c"],"versions":[{"version":"2.6.12","status":"affected"},{"version":"0","lessThan":"2.6.12","status":"unaffected","versionType":"semver"},{"version":"5.10.121","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.46","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"5.17.14","lessThanOrEqual":"5.17.*","status":"unaffected","versionType":"semver"},{"version":"5.18.3","lessThanOrEqual":"5.18.*","status":"unaffected","versionType":"semver"},{"version":"5.19","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.10.121"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.15.46"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.17.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.18.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.19"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/40bdb5ec957aca5c5c1924602bef6b0ab18e22d3"},{"url":"https://git.kernel.org/stable/c/11868ca21585561659c2575b0d6508ef8e9c4291"},{"url":"https://git.kernel.org/stable/c/5e5fe2b6065541c6216a7a003b0cddf386be0d2d"},{"url":"https://git.kernel.org/stable/c/517dcef4d2dda0132648f1e4c079ed17bba4d1a4"},{"url":"https://git.kernel.org/stable/c/0125de38122f0f66bf61336158d12a1aabfe6425"}],"title":"ALSA: usb-audio: Cancel pending work at closing a MIDI substream","x_generator":{"engine":"bippy-1.2.0"}}}}