{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-31768", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.140Z", "datePublished": "2026-05-01T14:14:57.971Z", "dateUpdated": "2026-08-05T12:25:01.435Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:25:01.435Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niio: adc: ti-adc161s626: use DMA-safe memory for spi_read()\n\nAdd a DMA-safe buffer and use it for spi_read() instead of a stack\nmemory. All SPI buffers must be DMA-safe.\n\nSince we only need up to 3 bytes, we just use a u8[] instead of __be16\nand __be32 and change the conversion functions appropriately." } ], "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 vulnerable `spi_read()` is reachable by a local user reading the world-readable IIO raw sysfs attribute for the ADC device. There is no network or adjacent protocol path to this hardware-specific SPI ADC driver.\nAC:L - On an affected system with this ADC behind a DMA-capable SPI controller, the attacker can repeatedly trigger the vulnerable read directly; no race or external condition beyond the deployment is required.\nPR:L - Triggering the direct IIO raw read requires only a basic local unprivileged user able to read sysfs device attributes. No real root/admin capability is required for that path.\nUI:N - The attacker can trigger the read themselves by accessing the sysfs attribute. No victim action is needed.\nS:U - The corruption occurs within the kernel context managing the SPI/IIO device. It does not cross a separate security authority such as a guest/host or IOMMU isolation boundary.\nC:H - The bug passes kernel stack memory as a DMA receive buffer, creating kernel stack/cacheline memory corruption on DMA-capable controllers. Kernel stack corruption is reasonably exploitable for broader kernel memory disclosure.\nI:H - DMA into non-DMA-safe stack memory can corrupt adjacent kernel stack state and potentially control data or control flow. Under the required high-severity tie-break, this supports high integrity impact.\nA:H - Kernel stack corruption from repeated ADC reads can cause oopses, panics, or hangs. Availability impact is therefore high." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/iio/adc/ti-adc161s626.c" ], "versions": [ { "version": "4d671b71beefbfc145b971a11e0c3cabde94b673", "lessThan": "b3bb8faeca1a2ef7be95ee8a512b639f9ffce947", "status": "affected", "versionType": "git" }, { "version": "4d671b71beefbfc145b971a11e0c3cabde94b673", "lessThan": "fa64aab25aba47296aa8d12bb4c88ec3fecb2054", "status": "affected", "versionType": "git" }, { "version": "4d671b71beefbfc145b971a11e0c3cabde94b673", "lessThan": "67b3a91bdc48220bfb67155ab528121b9c822782", "status": "affected", "versionType": "git" }, { "version": "4d671b71beefbfc145b971a11e0c3cabde94b673", "lessThan": "014c6d27878d3883f7bb065610768fd021de1a96", "status": "affected", "versionType": "git" }, { "version": "4d671b71beefbfc145b971a11e0c3cabde94b673", "lessThan": "d2d031b0786ea66ab0577c9d2d71435068d32199", "status": "affected", "versionType": "git" }, { "version": "4d671b71beefbfc145b971a11e0c3cabde94b673", "lessThan": "768461517a28d80fe81ea4d5d03a90cd184ea6ad", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/iio/adc/ti-adc161s626.c" ], "versions": [ { "version": "4.9", "status": "affected" }, { "version": "0", "lessThan": "4.9", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.168", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.134", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.81", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.22", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19.12", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0", "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": "4.9", "versionEndExcluding": "6.1.168" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.6.134" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.12.81" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.18.22" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "6.19.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9", "versionEndExcluding": "7.0" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/b3bb8faeca1a2ef7be95ee8a512b639f9ffce947" }, { "url": "https://git.kernel.org/stable/c/fa64aab25aba47296aa8d12bb4c88ec3fecb2054" }, { "url": "https://git.kernel.org/stable/c/67b3a91bdc48220bfb67155ab528121b9c822782" }, { "url": "https://git.kernel.org/stable/c/014c6d27878d3883f7bb065610768fd021de1a96" }, { "url": "https://git.kernel.org/stable/c/d2d031b0786ea66ab0577c9d2d71435068d32199" }, { "url": "https://git.kernel.org/stable/c/768461517a28d80fe81ea4d5d03a90cd184ea6ad" } ], "title": "iio: adc: ti-adc161s626: use DMA-safe memory for spi_read()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "x_adpType": "supplier", "providerMetadata": { "orgId": 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