CVE-2026-99267

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    CVE-2026-99267

    Published: 3 Nov 2026Last Modified: 4 Nov 2026

    Summary: io_uring/napi: make stale entries time out after 60s

    Details: In the Linux kernel, the following vulnerability has been resolved: io_uring/napi: make stale entries time out after 60s With dynamic tracking a NAPI id that hasn't been seen for a minute is meant to be dropped from the list the ring busy polls. The timeout is added to jiffies, but it is defined as 60 * SEC_CONVERSION, and SEC_CONVERSION isn't the number of jiffies in a second. It is the internal factor of __timespec64_to_jiffies(), HZ scaled up by SEC_JIFFIE_SC bits. For HZ=1000 that is 1000 << 22, which puts the timeout at about eight years. On 32-bit the multiplication overflows. So entries are never removed, and every id that a socket of the ring ever had keeps being polled on each wait.

    References: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git, https://git.kernel.org/stable/c/18c373f446068972788158c8c7de6e849b04ed98, https://git.kernel.org/stable/c/3fe820cf35f83534eab72ea73f1a83cfd3cd8079, https://git.kernel.org/stable/c/981621d6eadcd232d4ea748aaeb046337f10d3c1, https://git.kernel.org/stable/c/9c151648780d89e5446e5f89f3fa2e416c3bb911, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/99xxx/CVE-2026-99267.json, https://nvd.nist.gov/vuln/detail/CVE-2026-99267

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 8d0c12a80cdeb80d5e0510e96d38fe551ed8e9b5
    Fixed -3fe820cf35f83534eab72ea73f1a83cfd3cd8079

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2026-99267 | CVE-DB