{"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"}}}}