CVE-2025-40344 (GCVE-0-2025-40344)

Vulnerability from cvelistv5 – Published: 2025-12-09 04:10 – Updated: 2026-08-05 12:09
VLAI
Title
ASoC: Intel: avs: Disable periods-elapsed work when closing PCM
Summary
In the Linux kernel, the following vulnerability has been resolved: ASoC: Intel: avs: Disable periods-elapsed work when closing PCM avs_dai_fe_shutdown() handles the shutdown procedure for HOST HDAudio stream while period-elapsed work services its IRQs. As the former frees the DAI's private context, these two operations shall be synchronized to avoid slab-use-after-free or worse errors.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 0dbb186c3510cad4e9f443e801bf2e6ab5770c00 , < ca6d2b7aca778afbf8c0c4b330d10cb228c14052 (git)
Affected: 0dbb186c3510cad4e9f443e801bf2e6ab5770c00 , < b41fca4aa60be896ba8a81b57aac5dcc6eee66c0 (git)
Affected: 0dbb186c3510cad4e9f443e801bf2e6ab5770c00 , < 845f716dc5f354c719f6fda35048b6c2eca99331 (git)
Affected: 31087af37d6b1586b76d4acf3e0c1634a4617ba6 (git)
Affected: 6.11.9 , < 6.12 (semver)
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Linux Linux Affected: 6.12
Unaffected: 0 , < 6.12 (semver)
Unaffected: 6.12.58 , ≤ 6.12.* (semver)
Unaffected: 6.17.8 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "sound/soc/intel/avs/pcm.c"
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          "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\u0027s private context, these two operations shall be\nsynchronized to avoid slab-use-after-free or worse errors."
        }
      ],
      "metrics": [
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "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 \u2014 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` \u2014 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` \u2192 `avs_dai_fe_startup` \u2192 `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-\u003esubstream` and `snd_pcm_period_elapsed()` follows it into `runtime` \u2014 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-\u003edata` fields into reclaimed memory and dispatches through a freed `work-\u003efunc`, and the handler writes through the attacker-controlled `substream`/`runtime` pointers \u2014 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."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:09:47.053Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
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          "url": "https://git.kernel.org/stable/c/ca6d2b7aca778afbf8c0c4b330d10cb228c14052"
        },
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          "url": "https://git.kernel.org/stable/c/b41fca4aa60be896ba8a81b57aac5dcc6eee66c0"
        },
        {
          "url": "https://git.kernel.org/stable/c/845f716dc5f354c719f6fda35048b6c2eca99331"
        }
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      "title": "ASoC: Intel: avs: Disable periods-elapsed work when closing PCM",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-40344",
    "datePublished": "2025-12-09T04:10:03.253Z",
    "dateReserved": "2025-04-16T07:20:57.187Z",
    "dateUpdated": "2026-08-05T12:09:47.053Z",
    "state": "PUBLISHED"
  },
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                "programFiles": [
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            "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\u0027s private context, these two operations shall be\nsynchronized to avoid slab-use-after-free or worse errors."
          }
        ],
        "id": "CVE-2025-40344",
        "lastModified": "2026-07-30T06:24:30.537",
        "metrics": {
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                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
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        "vulnStatus": "Deferred"
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      "current_release_date": "2026-07-30T08:37:54+00:00",
      "cve": "CVE-2025-40344",
      "id": "CVE-2025-40344",
      "initial_release_date": "2025-12-09T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ASoC: Intel: avs: Disable periods-elapsed work when closing PCM",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-40344.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-19T02:05:22Z",
      "cve": "CVE-2025-40344",
      "id": "CVE-2025-40344",
      "initial_release_date": "2025-12-10T00:26:19Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "394",
      "product_status:known_not_affected": "512",
      "product_status:recommended": "172",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-40344",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2025-40344.json",
      "version": "19"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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