CVE-2026-98912 (GCVE-0-2026-98912)

Vulnerability from cvelistv5 – Published: 2026-10-23 11:55 – Updated: 2026-10-26 06:56
VLAI
Title
ALSA: seq: oss: Reject reads that cannot fit the next event
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: seq: oss: Reject reads that cannot fit the next event snd_seq_oss_read() checks whether the next queued OSS sequencer event fits in the remaining userspace buffer before removing it from the read queue. The check is inverted. It currently stops when the event is smaller than the remaining buffer, so a normal 4-byte event is not copied for an 8-byte read buffer. Conversely, an 8-byte event can be copied for a smaller read count. Break only when the remaining userspace buffer is smaller than the next event, and report -EINVAL if no complete event has been copied. This prevents an undersized read from looking like end-of-file while leaving the event queued for a later read with a large enough buffer.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7067 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < b3b4b647313757a275be7f7f9d0415d0a90acf73 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 591226398c1f93bd994678237ff0be229b19d3bb (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 372bec8a01e2ab8eaa6851bdc346ede5f82dba99 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 2922cf2583e590f51bed613a6fcd27b9aea83674 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 7483fd5f6990f43cc266e94b3f50ce84856ebb97 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 20b8520d1ef996173065f7abdde47b99136c0785 (git)
Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 611f538253d970f4d152003841544e875828d015 (git)
guessed Create a notification for this product.
Linux Linux Affected: 2.6.12
Unaffected: 0 , < 2.6.12 (semver)
Unaffected: 5.10.271 , ≤ 5.10.* (semver)
Unaffected: 5.15.222 , ≤ 5.15.* (semver)
Unaffected: 6.1.189 , ≤ 6.1.* (semver)
Unaffected: 6.6.158 , ≤ 6.6.* (semver)
Unaffected: 6.12.111 , ≤ 6.12.* (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: seq: oss: Reject reads that cannot fit the next event\n\nsnd_seq_oss_read() checks whether the next queued OSS sequencer event\nfits in the remaining userspace buffer before removing it from the read\nqueue.\n\nThe check is inverted. It currently stops when the event is smaller than\nthe remaining buffer, so a normal 4-byte event is not copied for an\n8-byte read buffer. Conversely, an 8-byte event can be copied for a\nsmaller read count.\n\nBreak only when the remaining userspace buffer is smaller than the next\nevent, and report -EINVAL if no complete event has been copied. This\nprevents an undersized read from looking like end-of-file while leaving\nthe event queued for a later read with a large enough buffer."
        }
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      "providerMetadata": {
        "dateUpdated": "2026-10-26T06:56:42.752Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        },
        {
          "url": "https://git.kernel.org/stable/c/611f538253d970f4d152003841544e875828d015"
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    "datePublished": "2026-10-23T11:55:04.908Z",
    "dateReserved": "2026-09-25T10:25:14.379Z",
    "dateUpdated": "2026-10-26T06:56:42.752Z",
    "state": "PUBLISHED"
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      "id": "msrc_CVE-2026-98912",
      "initial_release_date": "2026-10-24T01:05:47.000Z",
      "product_status:fixed": "1",
      "product_status:known_affected": "1",
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      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "ALSA: seq: oss: Reject reads that cannot fit the next event",
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      "version": "3"
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            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: seq: oss: Reject reads that cannot fit the next event\n\nsnd_seq_oss_read() checks whether the next queued OSS sequencer event\nfits in the remaining userspace buffer before removing it from the read\nqueue.\n\nThe check is inverted. It currently stops when the event is smaller than\nthe remaining buffer, so a normal 4-byte event is not copied for an\n8-byte read buffer. Conversely, an 8-byte event can be copied for a\nsmaller read count.\n\nBreak only when the remaining userspace buffer is smaller than the next\nevent, and report -EINVAL if no complete event has been copied. This\nprevents an undersized read from looking like end-of-file while leaving\nthe event queued for a later read with a large enough buffer."
          }
        ],
        "id": "CVE-2026-98912",
        "lastModified": "2026-10-26T07:17:16.610",
        "metrics": {},
        "published": "2026-10-23T12:18:25.350",
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    }
  }
}



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