{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-89943", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.777Z", "datePublished": "2026-09-16T10:32:30.527Z", "dateUpdated": "2026-10-19T08:55:17.585Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:55:17.585Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: loongson: Fix error handling in ACPI property parsing\n\nIn loongson_card_parse_acpi(), the return value of\ndevice_property_read_string() for the `codec-dai-name` property was\nignored. If the property is missing or invalid, an uninitialized pointer\nwould be used later, potentially leading to undefined behavior.\n\nFix this by checking the return value and propagating the error\nappropriately." } ], "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 loongson_card_parse_acpi(), reached only from the Loongson ASoC platform probe (loongson_asoc_card_probe) when an ACPI-companion sound-card device is enumerated. There is no network, Bluetooth, or USB packet path into this ACPI property parser.\nAC:L - If the codec-dai-name ACPI property is missing or not a string, device_property_read_string() fails without writing codec_dai_name; the ignored return then deterministically stores that uninitialized pointer into the static DAI link. No race or attacker-uncontrollable layout is required.\nPR:N - loongson_asoc_card_probe() runs automatically from ACPI/platform enumeration (PRP0001 compatible loongson,ls-audio-card) on Loongson laptops, embedded boards, and LoongArch VMs; no OS account, capability, or user-namespace privilege is checked on this probe path.\nUI:N - Probe and deferred-probe retries run unattended at boot when the matching ACPI audio-card device is present; no victim must open ALSA nodes, load a module by hand, or plug in extra hardware.\nS:U - The uninitialized DAI-name pointer is consumed inside the host ASoC core (DAI matching and logging) on the same kernel security authority; this is not a VM escape, IOMMU bypass, or sandbox breakout.\nC:H - The garbage pointer is stored as codecs->dai_name and later passed to strcmp() in snd_soc_is_matching_dai() and to %s in the CODEC DAI not-registered log, producing an unbounded kernel-memory read rather than a small bounded leak.\nI:H - The same uninitialized stack pointer is written into static loongson_dai_links[] used for DAI matching; a wild-pointer match binds the wrong codec DAI (type confusion) and later ASoC bring-up operates through that component, an exploitable integrity primitive consistent with uninitialized-pointer scoring.\nA:H - strcmp() or printk %s on the uninitialized pointer oopses or panics the kernel during sound-card probe on affected Loongson ACPI systems, fully denying availability." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "sound/soc/loongson/loongson_card.c" ], "versions": [ { "version": "ddb538a3004b10a04a14a0d275c5f52a8d161e80", "lessThan": "682c123cef455545f48ecbe74b3872fa303bf58f", "status": "affected", "versionType": "git" }, { "version": "ddb538a3004b10a04a14a0d275c5f52a8d161e80", "lessThan": "4e580d84a638f007b5b68d50d7633de502f325e7", "status": "affected", "versionType": "git" }, { "version": "ddb538a3004b10a04a14a0d275c5f52a8d161e80", "lessThan": "bb1602908c67db7197ab001638573262bccc6ca2", "status": "affected", "versionType": "git" }, { "version": "ddb538a3004b10a04a14a0d275c5f52a8d161e80", "lessThan": "0eb0e3c623ac1da8b85d518043fef7660af7805d", "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/loongson/loongson_card.c" ], "versions": [ { "version": "6.12", "status": "affected" }, { "version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.110", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.51", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.5", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "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": "6.12.110" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.18.51" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.2.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/682c123cef455545f48ecbe74b3872fa303bf58f" }, { "url": "https://git.kernel.org/stable/c/4e580d84a638f007b5b68d50d7633de502f325e7" }, { "url": "https://git.kernel.org/stable/c/bb1602908c67db7197ab001638573262bccc6ca2" }, { "url": "https://git.kernel.org/stable/c/0eb0e3c623ac1da8b85d518043fef7660af7805d" } ], "title": "ASoC: loongson: Fix error handling in ACPI property parsing", "x_generator": { "engine": "bippy-1.2.0" } } } }