{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-31475", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.098Z", "datePublished": "2026-04-22T13:54:04.113Z", "dateUpdated": "2026-08-05T12:22:53.935Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:22:53.935Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: sma1307: fix double free of devm_kzalloc() memory\n\nA previous change added NULL checks and cleanup for allocation\nfailures in sma1307_setting_loaded().\n\nHowever, the cleanup for mode_set entries is wrong. Those entries are\nallocated with devm_kzalloc(), so they are device-managed resources and\nmust not be freed with kfree(). Manually freeing them in the error path\ncan lead to a double free when devres later releases the same memory.\n\nDrop the manual kfree() loop and let devres handle the cleanup." } ], "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 path is reachable locally through the ALSA control ioctl for the SMA1307 \"Reset Switch\", which calls `sma1307_reset()` and then `sma1307_setting_loaded()`. There is no network, Bluetooth, WiFi, or other remote packet path to this I2C audio codec driver.\nAC:L - Once an affected SMA1307 device and setting firmware are present, an attacker can repeatedly invoke the reset control to drive the firmware-loading allocations until the `mode_set` allocation failure path is reached. The attacker influences the memory-pressure condition and there is no race requiring victim-controlled timing.\nPR:L - The ioctl path requires local access to the ALSA control device, but the kernel control write path does not require CAP_SYS_ADMIN or real root. This is consistent with a basic local user who has access to the sound card controls.\nUI:N - The attacker can trigger the reset control directly via an ioctl. No separate victim action is required.\nS:U - The corruption occurs in kernel memory within the same host kernel security authority. It does not cross a VM, IOMMU, or similar security boundary.\nC:H - The bug frees devm-managed heap memory with the wrong API, leaving stale devres ownership and creating a double-free/use-after-free style kernel heap corruption condition. Such corruption can reasonably be leveraged for kernel memory disclosure.\nI:H - Kernel heap double-free/use-after-free corruption can be shaped into arbitrary write or control-flow corruption. Under the required overestimation rule, integrity impact is High.\nA:H - The invalid/double free can trigger allocator corruption, kernel warnings/oopses, or panic during the error path or later devres release. Repeated triggering can therefore cause full kernel availability loss." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "sound/soc/codecs/sma1307.c" ], "versions": [ { "version": "0ec6bd16705fe21d6429d6b8f7981eae2142bba8", "lessThan": "d472d1a52985211b92883bb64bbe710b45980190", "status": "affected", "versionType": "git" }, { "version": "0ec6bd16705fe21d6429d6b8f7981eae2142bba8", "lessThan": "1a82c3272626db9006f4c2cad3adf2916417aed6", "status": "affected", "versionType": "git" }, { "version": "0ec6bd16705fe21d6429d6b8f7981eae2142bba8", "lessThan": "fe757092d2329c397ecb32f2bf68a5b1c4bd9193", "status": "affected", "versionType": "git" }, { "version": "f8434b8ba437d3f6cbcd9ffe8405bd16ed28fc5c", "status": "affected", "versionType": "git" }, { "version": "6.14.9", "lessThan": "6.15", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "sound/soc/codecs/sma1307.c" ], "versions": [ { "version": "6.15", "status": "affected" }, { "version": "0", "lessThan": "6.15", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.21", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19.11", "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": "6.15", "versionEndExcluding": "6.18.21" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "6.19.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.0" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.14.9" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/d472d1a52985211b92883bb64bbe710b45980190" }, { "url": "https://git.kernel.org/stable/c/1a82c3272626db9006f4c2cad3adf2916417aed6" }, { "url": "https://git.kernel.org/stable/c/fe757092d2329c397ecb32f2bf68a5b1c4bd9193" } ], "title": "ASoC: sma1307: fix double free of devm_kzalloc() memory", "x_generator": { "engine": "bippy-1.2.0" } } } }