{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-40344", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T07:20:57.187Z", "datePublished": "2025-12-09T04:10:03.253Z", "dateUpdated": "2026-08-05T12:09:47.053Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:09:47.053Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: Intel: avs: Disable periods-elapsed work when closing PCM\n\navs_dai_fe_shutdown() handles the shutdown procedure for HOST HDAudio\nstream while period-elapsed work services its IRQs. As the former\nfrees the DAI's private context, these two operations shall be\nsynchronized to avoid slab-use-after-free or worse errors." } ], "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 vulnerability is reached only through ALSA PCM device nodes (`/dev/snd/pcmC*D*`) via open/ioctl/close syscalls on a machine with an Intel cAVS DSP audio controller. There is no remote or adjacent-network path to the FE DAI shutdown code.\nAC:L - The attacker controls both sides of the race — the period size (and thus the IRQ rate) via `hw_params`, the exact moment of `close()`, and the `system_wq` backlog that delays the pending `period_elapsed_work` — and the open/start/close sequence can be retried in an unbounded loop until the window is hit.\nPR:L - Only an unprivileged local account with access to the sound device is needed, which is the default for any desktop/seat user, `audio`-group member, or Android media process; no capability or root check exists along `snd_pcm_open` → `avs_dai_fe_startup` → `avs_dai_fe_shutdown`.\nUI:N - The attacking process performs the entire open/hw_params/prepare/start/close sequence itself; no action by another user or victim is required.\nS:U - The use-after-free corrupts kernel slab memory within the same kernel security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The freed `avs_dma_data` can be reclaimed by an attacker-sprayed object, after which `avs_period_elapsed_work()` reads `data->substream` and `snd_pcm_period_elapsed()` follows it into `runtime` — giving attacker-directed kernel reads and disclosure of arbitrary kernel memory.\nI:H - The `work_struct` itself lives in the freed allocation, so the workqueue writes list/`work->data` fields into reclaimed memory and dispatches through a freed `work->func`, and the handler writes through the attacker-controlled `substream`/`runtime` pointers — a control-flow-hijack-capable write primitive.\nA:H - Even unweaponized, the slab use-after-free dereferences freed memory from workqueue context, reliably producing a KASAN splat, oops, or kernel panic." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "sound/soc/intel/avs/pcm.c" ], "versions": [ { "version": "0dbb186c3510cad4e9f443e801bf2e6ab5770c00", "lessThan": "ca6d2b7aca778afbf8c0c4b330d10cb228c14052", "status": "affected", "versionType": "git" }, { "version": "0dbb186c3510cad4e9f443e801bf2e6ab5770c00", "lessThan": "b41fca4aa60be896ba8a81b57aac5dcc6eee66c0", "status": "affected", "versionType": "git" }, { "version": "0dbb186c3510cad4e9f443e801bf2e6ab5770c00", "lessThan": "845f716dc5f354c719f6fda35048b6c2eca99331", "status": "affected", "versionType": "git" }, { "version": "31087af37d6b1586b76d4acf3e0c1634a4617ba6", "status": "affected", "versionType": "git" }, { "version": "6.11.9", "lessThan": "6.12", "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/intel/avs/pcm.c" ], "versions": [ { "version": "6.12", "status": "affected" }, { "version": "0", "lessThan": "6.12", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.58", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.17.8", "lessThanOrEqual": "6.17.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18", "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": "6.12.58" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.17.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.12", "versionEndExcluding": "6.18" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11.9" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/ca6d2b7aca778afbf8c0c4b330d10cb228c14052" }, { "url": "https://git.kernel.org/stable/c/b41fca4aa60be896ba8a81b57aac5dcc6eee66c0" }, { "url": "https://git.kernel.org/stable/c/845f716dc5f354c719f6fda35048b6c2eca99331" } ], "title": "ASoC: Intel: avs: Disable periods-elapsed work when closing PCM", "x_generator": { "engine": "bippy-1.2.0" } } } }