{"id":"CVE-2026-72261","state":"PUBLISHED","title":"ASoC: SOF: ipc3-control: Validate size in snd_sof_update_control","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: SOF: ipc3-control: Validate size in snd_sof_update_control\n\nIn snd_sof_update_control(), firmware-provided cdata->num_elems is\nchecked against local_cdata->data->size but never against the actual\nallocation size. If local_cdata->data->size was previously set to an\ninconsistent value, the memcpy could write past the allocated buffer.\n\nAdd a bounds check to ensure num_elems fits within the available space\nin the ipc_control_data allocation before copying.","publishedAt":"2026-08-15T05:54:49.022Z","updatedAt":"2026-10-16T18:55:13.974Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"10f461d79c2d1afb22344986cc1b4631169cf25e","status":"affected","lessThan":"1dc25a3e06364f48c4ef06016852f8b82425151a","versionType":"git"},{"version":"10f461d79c2d1afb22344986cc1b4631169cf25e","status":"affected","lessThan":"ee781058cd4d71e4449f41cbe6a3b8c59daa2c51","versionType":"git"},{"version":"10f461d79c2d1afb22344986cc1b4631169cf25e","status":"affected","lessThan":"ecf67f1302f2080b4d241b973364aacda70ad740","versionType":"git"},{"version":"10f461d79c2d1afb22344986cc1b4631169cf25e","status":"affected","lessThan":"d3abaedf6a58469610136d2dace1a85cddf7afcf","versionType":"git"},{"version":"10f461d79c2d1afb22344986cc1b4631169cf25e","status":"affected","lessThan":"2a591bf6fd41fd14bdae689aafac4a9ee702c23c","versionType":"git"},{"version":"10f461d79c2d1afb22344986cc1b4631169cf25e","status":"affected","lessThan":"390aa4c9339bb0ec0bc8d554e830faf93ca9d49e","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/soc/sof/ipc3-control.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.18","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/soc/sof/ipc3-control.c"]}],"references":["https://git.kernel.org/stable/c/1dc25a3e06364f48c4ef06016852f8b82425151a","https://git.kernel.org/stable/c/ee781058cd4d71e4449f41cbe6a3b8c59daa2c51","https://git.kernel.org/stable/c/ecf67f1302f2080b4d241b973364aacda70ad740","https://git.kernel.org/stable/c/d3abaedf6a58469610136d2dace1a85cddf7afcf","https://git.kernel.org/stable/c/2a591bf6fd41fd14bdae689aafac4a9ee702c23c","https://git.kernel.org/stable/c/390aa4c9339bb0ec0bc8d554e830faf93ca9d49e"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/72xxx/CVE-2026-72261.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72261","state":"PUBLISHED","datePublished":"2026-08-15T05:54:49.022Z","dateUpdated":"2026-10-16T18:55:13.974Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-09T03:40:39.915Z"},"containers":{"cna":{"title":"ASoC: SOF: ipc3-control: Validate size in snd_sof_update_control","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: SOF: ipc3-control: Validate size in snd_sof_update_control\n\nIn snd_sof_update_control(), firmware-provided cdata->num_elems is\nchecked against local_cdata->data->size but never against the actual\nallocation size. If local_cdata->data->size was previously set to an\ninconsistent value, the memcpy could write past the allocated buffer.\n\nAdd a bounds check to ensure num_elems fits within the available space\nin the ipc_control_data allocation before copying."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"10f461d79c2d1afb22344986cc1b4631169cf25e","status":"affected","lessThan":"1dc25a3e06364f48c4ef06016852f8b82425151a","versionType":"git"},{"version":"10f461d79c2d1afb22344986cc1b4631169cf25e","status":"affected","lessThan":"ee781058cd4d71e4449f41cbe6a3b8c59daa2c51","versionType":"git"},{"version":"10f461d79c2d1afb22344986cc1b4631169cf25e","status":"affected","lessThan":"ecf67f1302f2080b4d241b973364aacda70ad740","versionType":"git"},{"version":"10f461d79c2d1afb22344986cc1b4631169cf25e","status":"affected","lessThan":"d3abaedf6a58469610136d2dace1a85cddf7afcf","versionType":"git"},{"version":"10f461d79c2d1afb22344986cc1b4631169cf25e","status":"affected","lessThan":"2a591bf6fd41fd14bdae689aafac4a9ee702c23c","versionType":"git"},{"version":"10f461d79c2d1afb22344986cc1b4631169cf25e","status":"affected","lessThan":"390aa4c9339bb0ec0bc8d554e830faf93ca9d49e","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/soc/sof/ipc3-control.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.18","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["sound/soc/sof/ipc3-control.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/1dc25a3e06364f48c4ef06016852f8b82425151a"},{"url":"https://git.kernel.org/stable/c/ee781058cd4d71e4449f41cbe6a3b8c59daa2c51"},{"url":"https://git.kernel.org/stable/c/ecf67f1302f2080b4d241b973364aacda70ad740"},{"url":"https://git.kernel.org/stable/c/d3abaedf6a58469610136d2dace1a85cddf7afcf"},{"url":"https://git.kernel.org/stable/c/2a591bf6fd41fd14bdae689aafac4a9ee702c23c"},{"url":"https://git.kernel.org/stable/c/390aa4c9339bb0ec0bc8d554e830faf93ca9d49e"}],"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 on local SOF/IPC3 systems when DSP firmware sends SOF_IPC_GLB_COMP_MSG notifications that flow through sof_ipc3_rx_msg() to sof_ipc3_control_update() and snd_sof_update_control(); setup uses local ALSA ioctl/TLV on /dev/snd/controlC*, not remote network input.\nAC:L - An attacker can create the inconsistent local_cdata->data->size via ALSA bytes put/get IPC to the DSP and then reliably provoke matching firmware control notifications by driving audio activity; no uncontrollable memory layout or victim timing is required.\nPR:L - Reaching SOF binary kcontrols requires only local ALSA access to sound control devices, which is typically granted to unprivileged users in the audio group without init-namespace root or CAP_SYS_ADMIN; user namespaces do not grant this hardware path.\nUI:N - No separate victim action is needed; exploitation uses the attacker's own local ALSA clients and audio sessions to reach the vulnerable IPC3 control-update path on affected SOF hardware.\nS:U - Impact is kernel heap corruption and privilege escalation within the host kernel security domain; it does not cross VM, container, or IOMMU boundaries into another authority.\nC:H - The unchecked memcpy can write past the ipc_control_data kzalloc buffer, corrupting adjacent kernel heap objects and enabling information disclosure or further memory corruption primitives beyond the intended control cache.\nI:H - This is an out-of-bounds kernel heap write that can overwrite adjacent structures and be leveraged for control-flow hijack or local privilege escalation, not merely limited or benign data modification.\nA:H - Writing beyond the allocated ipc_control_data buffer can corrupt critical kernel heap metadata or objects and cause kernel oops/panic or system instability, satisfying high availability impact for kernel crashes."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T05:42:10.529Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-72261","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T18:45:28.490975Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-16T18:55:13.974Z"}}]}}}