{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-38628","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-06-18T19:36:34.946Z","datePublished":"2024-06-21T10:18:19.558Z","dateUpdated":"2026-08-05T11:33:16.721Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T11:33:16.721Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nusb: gadget: u_audio: Fix race condition use of controls after free during gadget unbind.\n\nHang on to the control IDs instead of pointers since those are correctly\nhandled with locks."}],"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 - The free side of the race is driven by local gadget teardown (`configfs` UDC unbind / `afunc_unbind` → `g_audio_cleanup`) and by the userspace close of the ALSA control fd that gates the deferred `snd_card_free_when_closed()`, while the use side is reachable locally through `dummy_hcd`/`raw-gadget` acting as an in-software USB host. This matches established kernel.org scoring for USB gadget bind/unbind use-after-frees (e.g. CVE-2025-38555, CVE-2026-63894).\nAC:L - The attacker controls both sides of the race — the moment of the free (unbind plus closing the last `/dev/snd/control*` descriptor, which is what actually triggers `snd_card_do_free()` and releases the kcontrols) and the moment of the use (UAC volume/mute `SET_CUR` transfers, altsetting changes, or bus suspend) — so it can be retried and won reliably.\nPR:L - An unprivileged local user can hold and release the ALSA control descriptor to pin the exact instant the kcontrols are freed and can drive the USB-side control transfers via the loopback host stack, consistent with the PR:L assigned to other gadget teardown use-after-frees reached through the same configfs path.\nUI:N - The attacker performs every step itself — unbind, fd close, and the UAC control traffic — with no action required from any other user.\nS:U - The use-after-free corrupts kernel heap memory within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The stale `snd_kcontrol` is read after free and its `id` field (including the 64-byte name) is copied into a `snd_ctl_event` delivered to userspace readers of the control device, leaking groomable freed slab contents; a controlled use-after-free read of this kind is a general kernel memory disclosure primitive.\nI:H - `set_active()` and `u_audio_set_volume/mute()` acquire `prm->lock` and write `prm->active`/`volume`/`mute` into the already-`kfree()`d `snd_uac_chip`, and `snd_ctl_notify()` performs list insertion on the freed `snd_card`, giving write-after-free and list-corruption primitives that can be leveraged for control-flow hijacking.\nA:H - Use of freed kcontrol, `snd_card`, and `snd_uac_chip` objects — including spinlock operations and list walks on freed memory — reliably produces KASAN splats, list corruption, and kernel panics."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/function/u_audio.c"],"versions":[{"version":"02de698ca8123782c0c6fb8ed99080e2f032b0d2","lessThan":"89e66809684485590ea0b32c3178e42cba36ac09","status":"affected","versionType":"git"},{"version":"02de698ca8123782c0c6fb8ed99080e2f032b0d2","lessThan":"453d3fa9266e53f85377b911c19b9a4563fa88c0","status":"affected","versionType":"git"},{"version":"02de698ca8123782c0c6fb8ed99080e2f032b0d2","lessThan":"bea73b58ab67fe581037ad9cdb93c2557590c068","status":"affected","versionType":"git"},{"version":"02de698ca8123782c0c6fb8ed99080e2f032b0d2","lessThan":"1b739388aa3f8dfb63a9fca777e6dfa6912d0464","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/usb/gadget/function/u_audio.c"],"versions":[{"version":"5.15","status":"affected"},{"version":"0","lessThan":"5.15","status":"unaffected","versionType":"semver"},{"version":"6.1.93","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.33","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.9.4","lessThanOrEqual":"6.9.*","status":"unaffected","versionType":"semver"},{"version":"6.10","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":"5.15","versionEndExcluding":"6.1.93"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.6.33"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.9.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.10"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/89e66809684485590ea0b32c3178e42cba36ac09"},{"url":"https://git.kernel.org/stable/c/453d3fa9266e53f85377b911c19b9a4563fa88c0"},{"url":"https://git.kernel.org/stable/c/bea73b58ab67fe581037ad9cdb93c2557590c068"},{"url":"https://git.kernel.org/stable/c/1b739388aa3f8dfb63a9fca777e6dfa6912d0464"}],"title":"usb: gadget: u_audio: Fix race condition use of controls after free during gadget unbind.","x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"problemTypes":[{"descriptions":[{"type":"CWE","cweId":"CWE-362","lang":"en","description":"CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')"}]}],"metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2024-06-24T15:20:09.528911Z","id":"CVE-2024-38628","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2024-11-05T16:32:35.156Z"}},{"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2024-08-02T04:12:26.065Z"},"title":"CVE Program Container","references":[{"url":"https://git.kernel.org/stable/c/89e66809684485590ea0b32c3178e42cba36ac09","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/453d3fa9266e53f85377b911c19b9a4563fa88c0","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/bea73b58ab67fe581037ad9cdb93c2557590c068","tags":["x_transferred"]},{"url":"https://git.kernel.org/stable/c/1b739388aa3f8dfb63a9fca777e6dfa6912d0464","tags":["x_transferred"]}]}]}}