CVE-2026-99263

{
  "id": "CVE-2026-99263",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-11-03T12:17:33.347",
  "lastModified": "2026-11-03T12:17:33.347",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nio_uring/poll: avoid retry wakeup loss when dropping ownership\n\nIf a wakeup sets IO_POLL_RETRY_FLAG between the owning task consuming\nthe existing instance of IO_POLL_RETRY_FLAG and the loop check\nof io_poll_check_events(), then we stall on processing the request\nuntil an unrelated wakeup comes along.\n\nUsing atomic_cmpxchg instead of atomic_sub_return to guarantee both the\ncount v and poll_refs are 0 and no wake-ups are missed."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "io_uring/poll.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "a26a35e9019fd70bf3cf647dcfdae87abc7bacea",
              "lessThan": "d1f6850086ac6f8b0fa44fb19aa2a468c73ee071",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a26a35e9019fd70bf3cf647dcfdae87abc7bacea",
              "lessThan": "41fae2e9e1fa3bee86aee0a25ba90e59ce5024bf",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a26a35e9019fd70bf3cf647dcfdae87abc7bacea",
              "lessThan": "4ef685b8505615729d75c875f52822238bf76ca6",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a26a35e9019fd70bf3cf647dcfdae87abc7bacea",
              "lessThan": "afa407c02f3aa0fd872f86c9bf1b34502e0fa8f0",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a26a35e9019fd70bf3cf647dcfdae87abc7bacea",
              "lessThan": "eb2a50d8235e4580fea9aa20f3fbe1a002c38cb1",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "a26a35e9019fd70bf3cf647dcfdae87abc7bacea",
              "lessThan": "521e8a65e9b45532295ba1082ef12be6e80c173b",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "4b702b7d11ce1b9d26fc6d7c5a7ef4ac1d455048",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "bc4e6ee16778149811333a969a7a893d4cc110c5",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "5.15.82",
              "lessThan": "5.16",
              "versionType": "semver",
              "status": "affected"
            },
            {
              "version": "6.0.11",
              "lessThan": "6.1",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "io_uring/poll.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.1",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.1",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.191",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.161",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.115",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.60",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.14",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3.1",
              "lessThanOrEqual": "7.3.*",
              "versionType": "semver",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/41fae2e9e1fa3bee86aee0a25ba90e59ce5024bf",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4ef685b8505615729d75c875f52822238bf76ca6",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/521e8a65e9b45532295ba1082ef12be6e80c173b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/afa407c02f3aa0fd872f86c9bf1b34502e0fa8f0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/d1f6850086ac6f8b0fa44fb19aa2a468c73ee071",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/eb2a50d8235e4580fea9aa20f3fbe1a002c38cb1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}