{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-74332", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.885Z", "datePublished": "2026-08-15T05:58:25.112Z", "dateUpdated": "2026-08-17T05:45:58.074Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:45:58.074Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: amd: acp-sdw-sof: Bound DAI link iteration\n\ncreate_sdw_dailinks() walks sof_dais until it finds an entry with\ninitialised cleared, but sof_dais is allocated with exactly num_ends\nentries. If all entries are initialised, the loop reads past the end of\nthe array.\n\nPass the allocated entry count to create_sdw_dailinks() and stop before\nreading past the array." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.4, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The bug is in create_sdw_dailinks() called from mc_probe() during SOF AMD PCI probe and platform_device_register_data(\"amd_sof_sdw\"); there is no network, Bluetooth, or remote-packet path—only onboard SoundWire topology from ACPI/firmware on AMD ACP63/70 laptops.\nAC:L - On affected AMD SOF SoundWire machines where every ACPI endpoint gets its own dailink (aggregated=0), all num_ends array slots are initialised and the unbounded while loop deterministically performs a slab out-of-bounds read on every probe, with no race or attacker-controlled memory layout required.\nPR:N - The vulnerable path runs automatically during kernel driver probe at boot with no authentication, capability, or userspace gate; snd_sof PCI binding and amd_sof_sdw machine registration occur from the PCI ID table without any privilege check on this code path.\nUI:N - Exploitation requires no victim action—the out-of-bounds access occurs inside mc_probe() during automatic machine-driver registration before any ALSA device open, mount, or other user interaction.\nS:U - The out-of-bounds read and any resulting kernel fault or heap corruption stay within the host kernel audio driver security boundary; this is not a VM escape, IOMMU bypass, or cross-authority sandbox breakout.\nC:H - The loop reads the initialised field past the kmalloc sof_dais[num_ends] boundary (KASAN slab-out-of-bounds, read size 1); if adjacent slab data is non-zero the walk continues, interpreting out-of-bounds asoc_sdw_dailink structures and dereferencing garbage list_head endpoints in create_sdw_dailink().\nI:H - When the out-of-bounds initialised byte is non-zero, create_sdw_dailink() processes attacker-uncontrolled dailink metadata and advances the dai_links pointer beyond the devm_kcalloc(num_links) allocation, enabling out-of-bounds writes into adjacent kernel heap objects during DAI link construction.\nA:H - Continuing past the array causes list_for_each_entry() on uninitialised endpoint lists and wild-pointer dereferences that produce a kernel oops/panic during probe; even the minimal one-byte slab OOB read is a confirmed memory-safety violation that can destabilize the audio subsystem on every boot of affected hardware." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "sound/soc/amd/acp/acp-sdw-sof-mach.c" ], "versions": [ { "version": "6d8348ddc56ed43ba39d1e8adda13299201f32ed", "lessThan": "0a5ff4000dd7a390139dd7823fef1de4963e490a", "status": "affected", "versionType": "git" }, { "version": "6d8348ddc56ed43ba39d1e8adda13299201f32ed", "lessThan": "9e82497138abea7d5c6e65015663d907fbcbf6b4", "status": "affected", "versionType": "git" }, { "version": "6d8348ddc56ed43ba39d1e8adda13299201f32ed", "lessThan": "86a64c049873fe4d4a6a378e27a333ab5631c4b2", "status": "affected", "versionType": "git" }, { "version": "6d8348ddc56ed43ba39d1e8adda13299201f32ed", "lessThan": "4d992e63f52d58f52b724606c60ae7b37a1c582f", "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/soc/amd/acp/acp-sdw-sof-mach.c" ], "versions": [ { "version": "6.12", "status": "affected" }, { "version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "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": "6.12", "versionEndExcluding": "6.12.97" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.18.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.1.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/0a5ff4000dd7a390139dd7823fef1de4963e490a" }, { "url": "https://git.kernel.org/stable/c/9e82497138abea7d5c6e65015663d907fbcbf6b4" }, { "url": "https://git.kernel.org/stable/c/86a64c049873fe4d4a6a378e27a333ab5631c4b2" }, { "url": "https://git.kernel.org/stable/c/4d992e63f52d58f52b724606c60ae7b37a1c582f" } ], "title": "ASoC: amd: acp-sdw-sof: Bound DAI link iteration", "x_generator": { "engine": "bippy-1.2.0" } } } }