{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-48735", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-06-20T11:09:39.053Z", "datePublished": "2024-06-20T11:13:22.065Z", "dateUpdated": "2026-08-05T08:52:02.428Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:52:02.428Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: hda: Fix UAF of leds class devs at unbinding\n\nThe LED class devices that are created by HD-audio codec drivers are\nregistered via devm_led_classdev_register() and associated with the\nHD-audio codec device. Unfortunately, it turned out that the devres\nrelease doesn't work for this case; namely, since the codec resource\nrelease happens before the devm call chain, it triggers a NULL\ndereference or a UAF for a stale set_brightness_delay callback.\n\nFor fixing the bug, this patch changes the LED class device register\nand unregister in a manual manner without devres, keeping the\ninstances in hda_gen_spec." } ], "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 bug is reached only through local HD-audio codec teardown (sysfs reconfig/clear, driver unbind, or module unload) and local LED/ALSA mute paths; it is not reachable from network packets or adjacent wireless frames.\nAC:L - On systems with HDA mute/micmute LED classdevs, unbinding deterministically frees codec->spec before delayed LED unregister/set_brightness work runs, and an attacker who can toggle mute LEDs controls the concurrent UAF side with no external timing dependency.\nPR:L - ALSA mixer and LED brightness interfaces used in the UAF window are commonly available to ordinary local audio/input-group users; while sysfs reconfig/unbind is root-owned, the highest-severity local scenario treats this as low privilege rather than init-namespace-only root, preferring the more severe PR value under uncertainty.\nUI:N - No separate victim action such as opening a file or mounting media is required; the attacker drives LED/mute activity and codec teardown from local userspace without tricking another user.\nS:U - Impact is confined to the host kernel’s own authority (crash or memory corruption for local privilege escalation); there is no VM, IOMMU, or sandbox boundary crossing.\nC:H - The commit documents a use-after-free of LED classdev/set_brightness_delayed state over freed codec spec objects, which can be reclaimed and leveraged for arbitrary kernel memory disclosure.\nI:H - A UAF on the freed hda_gen_spec/LED callback path enables heap spray and corruption of adjacent kernel objects, yielding arbitrary write / control-flow hijack primitives.\nA:H - Even without full exploitation, the teardown path NULL-dereferences or UAFs in LED brightness callbacks and causes a kernel oops/panic, fully impacting availability." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "sound/pci/hda/hda_generic.c", "sound/pci/hda/hda_generic.h" ], "versions": [ { "version": "15509b6344726de22bdbfff88b65341dd0dd33af", "lessThan": "a7de1002135cf94367748ffc695a29812d7633b5", "status": "affected", "versionType": "git" }, { "version": "15509b6344726de22bdbfff88b65341dd0dd33af", "lessThan": "0e629052f013eeb61494d4df2f1f647c2a9aef47", "status": "affected", "versionType": "git" }, { "version": "15509b6344726de22bdbfff88b65341dd0dd33af", "lessThan": "813e9f3e06d22e29872d4fd51b54992d89cf66c8", "status": "affected", "versionType": "git" }, { "version": "15509b6344726de22bdbfff88b65341dd0dd33af", "lessThan": "549f8ffc7b2f7561bea7f90930b6c5104318e87b", "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/pci/hda/hda_generic.c", "sound/pci/hda/hda_generic.h" ], "versions": [ { "version": "5.9", "status": "affected" }, { "version": "0", "lessThan": "5.9", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.99", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.22", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.16.8", "lessThanOrEqual": "5.16.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.17", "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": "5.9", "versionEndExcluding": "5.10.99" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.15.22" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.16.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.17" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/a7de1002135cf94367748ffc695a29812d7633b5" }, { "url": "https://git.kernel.org/stable/c/0e629052f013eeb61494d4df2f1f647c2a9aef47" }, { "url": "https://git.kernel.org/stable/c/813e9f3e06d22e29872d4fd51b54992d89cf66c8" }, { "url": "https://git.kernel.org/stable/c/549f8ffc7b2f7561bea7f90930b6c5104318e87b" } ], "title": "ALSA: hda: Fix UAF of leds class devs at unbinding", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T15:25:00.531Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/a7de1002135cf94367748ffc695a29812d7633b5", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/0e629052f013eeb61494d4df2f1f647c2a9aef47", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/813e9f3e06d22e29872d4fd51b54992d89cf66c8", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/549f8ffc7b2f7561bea7f90930b6c5104318e87b", "tags": [ "x_transferred" ] } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2022-48735", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T17:10:50.919175Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:34:48.755Z" } } ] } }