{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2024-26654",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-26654",
    "idYear": 2024,
    "status": "PUBLISHED",
    "publishedAt": "2024-04-01T08:35:19.763Z",
    "updatedAt": "2026-08-05T11:26:33.368Z",
    "importedAt": "2026-10-24T01:57:07.518Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "ALSA: sh: aica: reorder cleanup operations to avoid UAF bugs",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: sh: aica: reorder cleanup operations to avoid UAF bugs\n\nThe dreamcastcard->timer could schedule the spu_dma_work and the\nspu_dma_work could also arm the dreamcastcard->timer.\n\nWhen the snd_pcm_substream is closing, the aica_channel will be\ndeallocated. But it could still be dereferenced in the worker\nthread. The reason is that del_timer() will return directly\nregardless of whether the timer handler is running or not and\nthe worker could be rescheduled in the timer handler. As a result,\nthe UAF bug will happen. The racy situation is shown below:\n\n      (Thread 1)                 |      (Thread 2)\nsnd_aicapcm_pcm_close()          |\n ...                             |  run_spu_dma() //worker\n                                 |    mod_timer()\n  flush_work()                   |\n  del_timer()                    |  aica_period_elapsed() //timer\n  kfree(dreamcastcard->channel)  |    schedule_work()\n                                 |  run_spu_dma() //worker\n  ...                            |    dreamcastcard->channel-> //USE\n\nIn order to mitigate this bug and other possible corner cases,\ncall mod_timer() conditionally in run_spu_dma(), then implement\nPCM sync_stop op to cancel both the timer and worker. The sync_stop\nop will be called from PCM core appropriately when needed.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "198de43d758ca2700e2b52b49c0b189b4931466c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "eeb2a2ca0b8de7e1c66afaf719529154e7dc60b2"
            },
            {
              "version": "198de43d758ca2700e2b52b49c0b189b4931466c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "4206ad65a0ee76920041a755bd3c17c6ba59bba2"
            },
            {
              "version": "198de43d758ca2700e2b52b49c0b189b4931466c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "aa39e6878f61f50892ee2dd9d2176f72020be845"
            },
            {
              "version": "198de43d758ca2700e2b52b49c0b189b4931466c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8c990221681688da34295d6d76cc2f5b963e83f5"
            },
            {
              "version": "198de43d758ca2700e2b52b49c0b189b4931466c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "9d66ae0e7bb78b54e1e0525456c6b54e1d132046"
            },
            {
              "version": "198de43d758ca2700e2b52b49c0b189b4931466c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "61d4787692c1fccdc268ffa7a891f9c149f50901"
            },
            {
              "version": "198de43d758ca2700e2b52b49c0b189b4931466c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e955e8a7f38a856fc6534ba4e6bffd4d5cc80ac3"
            },
            {
              "version": "198de43d758ca2700e2b52b49c0b189b4931466c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3c907bf56905de7d27b329afaf59c2fb35d17b04"
            },
            {
              "version": "198de43d758ca2700e2b52b49c0b189b4931466c",
              "status": "affected",
              "versionType": "git",
              "lessThan": "051e0840ffa8ab25554d6b14b62c9ab9e4901457"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.23",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.23"
            },
            {
              "version": "4.19.312",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.274",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.215",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.154",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.84",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.24",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.7.12",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.7.*"
            },
            {
              "version": "6.8.3",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.8.*"
            },
            {
              "version": "6.9",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}