275 lines
14 KiB
JSON
275 lines
14 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2024-38388",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-06-21T10:12:11.500Z",
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"datePublished": "2024-06-21T10:18:12.995Z",
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"dateUpdated": "2026-08-05T11:32:36.453Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-05T11:32:36.453Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: hda/cs_dsp_ctl: Use private_free for control cleanup\n\nUse the control private_free callback to free the associated data\nblock. This ensures that the memory won't leak, whatever way the\ncontrol gets destroyed.\n\nThe original implementation didn't actually remove the ALSA\ncontrols in hda_cs_dsp_control_remove(). It only freed the internal\ntracking structure. This meant it was possible to remove/unload the\namp driver while leaving its ALSA controls still present in the\nsoundcard. Obviously attempting to access them could cause segfaults\nor at least dereferencing stale pointers."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 7.8,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - The vulnerable code is reached through ioctls (SNDRV_CTL_IOCTL_ELEM_READ/WRITE/INFO) on the local ALSA control device /dev/snd/controlC*, requiring local system access. There is no network-facing component in sound/pci/hda/hda_cs_dsp_ctl.c.\nAC:L - Once the amp driver is unbound the dangling kcontrol persists indefinitely on the sound card, so there is no race to win — the attacker freely grooms the kmalloc-32/kmalloc-192 slabs to reclaim the freed hda_cs_dsp_coeff_ctl and cs_dsp_coeff_ctl, then triggers the dereference at a time of their choosing, repeatably. Cirrus CS35L41/CS35L56 amps are present on a very large population of current laptops, so the affected configuration is common rather than exotic.\nPR:L - Exploitation only requires the ability to open /dev/snd/controlC* and issue element read/write ioctls, which snd_ctl_elem_read()/snd_ctl_elem_write() perform with no capability check — any local user in the audio group or with an active logind session qualifies. No root or CAP_SYS_ADMIN is needed to reach the use-after-free.\nUI:N - The attacker performs the entire exploit themselves with ioctls on the stale control; no victim needs to open a file, mount a filesystem, or otherwise interact. The driver-unbind that leaves the stale control behind is an ambient system state (module update, driver reload, codec rebind), not an action the attacker must social-engineer a victim into performing during the attack.\nS:U - The use-after-free corrupts kernel heap memory within the same kernel security authority; there is no VM, IOMMU, or sandbox boundary crossed. Standard kernel-local privilege escalation keeps the scope unchanged.\nC:H - After reclaiming the freed cs_dsp_coeff_ctl the attacker controls ctl->cache and ctl->len, and cs_dsp_coeff_read_ctrl() does memcpy(buf, ctl->cache + off*4, len) into the control value buffer, which snd_ctl_ioctl_elem_read() copies straight to userspace — an arbitrary kernel memory read primitive.\nI:H - cs_dsp_coeff_write_ctrl() does memcpy(ctl->cache + off*4, buf, len) with an attacker-controlled destination pointer and attacker-supplied data, giving an arbitrary kernel write; additionally the stale kcontrol's get/put/info function pointers reference the unloaded snd-hda-cs-dsp-ctls module text, allowing indirect control-flow hijack into freed executable memory.\nA:H - Even without successful heap grooming, dereferencing the freed hda_cs_dsp_coeff_ctl and cs_dsp_coeff_ctl, taking a mutex on freed memory, and calling into unloaded module text reliably produces an oops or panic. Any unprivileged user with audio access can crash the machine on demand."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"sound/pci/hda/hda_cs_dsp_ctl.c"
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],
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"versions": [
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{
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"version": "3233b978af23f11b4ad4f7f11a9a64bd05702b1f",
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"lessThan": "191dc1b2ff0fb35e7aff15a53224837637df8bff",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "3233b978af23f11b4ad4f7f11a9a64bd05702b1f",
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"lessThan": "6e359be4975006ff72818e79dad8fe48293f2eb2",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "3233b978af23f11b4ad4f7f11a9a64bd05702b1f",
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"lessThan": "3291486af5636540980ea55bae985f3eaa5b0740",
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"status": "affected",
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"lessThan": "172811e3a557d8681a5e2d0f871dc04a2d17eb13",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"sound/pci/hda/hda_cs_dsp_ctl.c"
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],
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"versions": [
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{
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"version": "6.0",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.0",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.93",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.33",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.9.4",
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"lessThanOrEqual": "6.9.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.10",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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"nodes": [
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.0",
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"versionEndExcluding": "6.1.93"
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},
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.0",
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.0",
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/191dc1b2ff0fb35e7aff15a53224837637df8bff"
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},
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{
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"url": "https://git.kernel.org/stable/c/6e359be4975006ff72818e79dad8fe48293f2eb2"
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},
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{
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"url": "https://git.kernel.org/stable/c/3291486af5636540980ea55bae985f3eaa5b0740"
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},
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{
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"url": "https://git.kernel.org/stable/c/172811e3a557d8681a5e2d0f871dc04a2d17eb13"
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}
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],
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"title": "ALSA: hda/cs_dsp_ctl: Use private_free for control cleanup",
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"x_generator": {
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"engine": "bippy-1.2.0"
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"type": "CWE",
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"lang": "en",
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"description": "CWE-noinfo Not enough information"
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"integrityImpact": "NONE",
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"attackComplexity": "LOW",
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{
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"other": {
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"type": "ssvc",
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"content": {
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"timestamp": "2024-06-24T15:21:00.338175Z",
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"id": "CVE-2024-38388",
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"options": [
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"Exploitation": "none"
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"dateUpdated": "2024-08-02T04:04:25.255Z"
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"title": "CVE Program Container",
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"references": [
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