Vulnerability-Lookup

GHSA-G8P3-WVVX-M6MF

Vulnerability from github – Published: 2026-07-19 18:31 – Updated: 2026-07-20 15:32

Details

In the Linux kernel, the following vulnerability has been resolved:

ALSA: pcm: Don't setup bogus iov_iter for silencing

At transition to the iov_iter for PCM data transfer, we blindly applied the iov_iter setup also for silencing (i.e. data = NULL), and it leads to a calculation of bogus iov_iter. Fortunately this didn't cause troubles on most of architectures but it goes wrong on RISC-V now, causing a NULL dereference.

Handle the NULL data case to treat the silencing in interleaved_copy() for addressing the bug above. noninterleaved_copy() has already the NULL data handling, so it doesn't need changes.

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64134"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-19T16:17:55Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: pcm: Don\u0027t setup bogus iov_iter for silencing\n\nAt transition to the iov_iter for PCM data transfer, we blindly\napplied the iov_iter setup also for silencing (i.e. data = NULL), and\nit leads to a calculation of bogus iov_iter.  Fortunately this didn\u0027t\ncause troubles on most of architectures but it goes wrong on RISC-V\nnow, causing a NULL dereference.\n\nHandle the NULL data case to treat the silencing in interleaved_copy()\nfor addressing the bug above.  noninterleaved_copy() has already the\nNULL data handling, so it doesn\u0027t need changes.",
  "id": "GHSA-g8p3-wvvx-m6mf",
  "modified": "2026-07-20T15:32:01Z",
  "published": "2026-07-19T18:31:53Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64134"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/41a766c647294842c9b17672449f8e011048cba9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c9f6768515818d71bdfc20119a81f3332c53b9c6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ce836587e594af39ff048d9b29dee0f5f10692c9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e4d3386b74fba8e01280484b67ee481ece00201e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/feff0251386aa6bb180a0a1cf7c1f91ba868113d"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-64134 (GCVE-0-2026-64134)

Vulnerability from cvelistv5 – Published: 2026-07-19 15:40 – Updated: 2026-07-20 13:43

Title

ALSA: pcm: Don't setup bogus iov_iter for silencing

Summary

In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: Don't setup bogus iov_iter for silencing At transition to the iov_iter for PCM data transfer, we blindly applied the iov_iter setup also for silencing (i.e. data = NULL), and it leads to a calculation of bogus iov_iter. Fortunately this didn't cause troubles on most of architectures but it goes wrong on RISC-V now, causing a NULL dereference. Handle the NULL data case to treat the silencing in interleaved_copy() for addressing the bug above. noninterleaved_copy() has already the NULL data handling, so it doesn't need changes.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux

References

5 references

URL	Tags
https://git.kernel.org/stable/c/41a766c647294842c…
https://git.kernel.org/stable/c/ce836587e594af39f…
https://git.kernel.org/stable/c/feff0251386aa6bb1…
https://git.kernel.org/stable/c/c9f6768515818d71b…
https://git.kernel.org/stable/c/e4d3386b74fba8e01…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: cf393babb37a1679a1ec1d864df1090353465e23 , < 41a766c647294842c9b17672449f8e011048cba9 (git) Affected: cf393babb37a1679a1ec1d864df1090353465e23 , < ce836587e594af39ff048d9b29dee0f5f10692c9 (git) Affected: cf393babb37a1679a1ec1d864df1090353465e23 , < feff0251386aa6bb180a0a1cf7c1f91ba868113d (git) Affected: cf393babb37a1679a1ec1d864df1090353465e23 , < c9f6768515818d71bdfc20119a81f3332c53b9c6 (git) Affected: cf393babb37a1679a1ec1d864df1090353465e23 , < e4d3386b74fba8e01280484b67ee481ece00201e (git)
Linux	Linux	Affected: 6.6 Unaffected: 0 , < 6.6 (semver) Unaffected: 6.6.142 , ≤ 6.6.* (semver) Unaffected: 6.12.92 , ≤ 6.12.* (semver) Unaffected: 6.18.34 , ≤ 6.18.* (semver) Unaffected: 7.0.11 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "sound/core/pcm_lib.c"
          ],
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          "vendor": "Linux",
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              "versionType": "git"
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          "versions": [
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              "version": "6.6"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
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              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "7.0.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
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        }
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            "baseSeverity": "HIGH",
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        {
          "url": "https://git.kernel.org/stable/c/e4d3386b74fba8e01280484b67ee481ece00201e"
        }
      ],
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    "datePublished": "2026-07-19T15:40:28.974Z",
    "dateReserved": "2026-07-19T07:54:57.036Z",
    "dateUpdated": "2026-07-20T13:43:40.344Z",
    "state": "PUBLISHED"
  },
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Sightings

Author	Source	Type	Date	Other

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.

Detection rules are retrieved from Rulezet.

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GHSA-G8P3-WVVX-M6MF

CVE-2026-64134 (GCVE-0-2026-64134)

Tags

Sightings

Nomenclature