CVE-2024-26739

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    CVE-2024-26739

    Published: 3 Apr 2024Last Modified: 12 Aug 2026

    Summary: net/sched: act_mirred: don't override retval if we already lost the skb

    Details: In the Linux kernel, the following vulnerability has been resolved: net/sched: act_mirred: don't override retval if we already lost the skb If we're redirecting the skb, and haven't called tcf_mirred_forward(), yet, we need to tell the core to drop the skb by setting the retcode to SHOT. If we have called tcf_mirred_forward(), however, the skb is out of our hands and returning SHOT will lead to UaF. Move the retval override to the error path which actually need it.

    References: https://git.kernel.org/stable/c/0117fe0a4615a7c8d30d6ebcbf87332fbe63e6fd, https://git.kernel.org/stable/c/166c2c8a6a4dc2e4ceba9e10cfe81c3e469e3210, https://git.kernel.org/stable/c/28cdbbd38a4413b8eff53399b3f872fd4e80db9d, https://git.kernel.org/stable/c/9d3ef89b6a5e9f2e940de2cef3d543be0be8dec5, https://git.kernel.org/stable/c/e873e8f7d03a2ee5b77fb1a305c782fed98e2754, https://git.kernel.org/stable/c/f4e294bbdca8ac8757db436fc82214f3882fc7e7, https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html, https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html, https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26739.json, https://nvd.nist.gov/vuln/detail/CVE-2024-26739, https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- e5cf1baf92cb785b90390db1c624948e70c8b8bd
    Fixed -0117fe0a4615a7c8d30d6ebcbf87332fbe63e6fd

    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-2024-26739 | CVE-DB