DEBIAN-CVE-2026-80858

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    DEBIAN-CVE-2026-80858

    Published: 4 Sept 2026Last Modified: 23 Sept 2026
    Upstream:
    CVE-2026-80858

    Summary:

    Details: In the Linux kernel, the following vulnerability has been resolved: fuse: publish io-uring queues with release semantics fuse_uring_create_queue() initializes a fuse_ring_queue and then publishes the pointer into ring->queues[qid] with WRITE_ONCE() under the fch->lock. There are several readers that may concurrently be fetching that pointer locklessly and then deferencing it. WRITE_ONCE() doesn't ensure ordering of the queue's field initialization before the ring->queues[qid] pointer assignment. The queue must be published with smp_store_release() so the field initialization is guaranteed to happen before. Readers in paths where the read may happen concurrently with the store need to use READ_ONCE() because any race involving a plain access is undefined.

    References: https://security-tracker.debian.org/tracker/CVE-2026-80858

    Affected packages

    Package

    Name: linux

    Purl: pkg:deb/debian/linux?arch=source&distro=forky

    Affected ranges

    Type: ECOSYSTEM

    Events:

    Introduced- 0
    Fixed -7.2.6-1

    Affected versions

    6.12.100-1
    6.12.101-1
    6.12.105-1
    6.12.107-1
    6.12.38-1
    6.12.41-1
    6.12.43-1
    6.12.43-1~bpo12+1
    6.12.48-1
    6.12.57-1
    6.12.57-1~bpo12+1
    6.12.63-1
    6.12.63-1~bpo12+1
    6.12.69-1
    6.12.69-1~bpo12+1
    6.12.73-1
    6.12.73-1~bpo12+1
    6.12.74-1
    6.12.74-2
    6.12.74-2~bpo12+1
    6.12.85-1
    6.12.85-1~bpo12+1
    6.12.86-1
    6.12.86-1~bpo12+1
    6.12.88-1
    6.12.88-1~bpo12+1
    6.12.90-1
    6.12.90-1~bpo12+1
    6.12.90-2
    6.12.90-2~bpo12+1
    6.12.94-1
    6.12.94-1~bpo12+1
    6.12.95-1
    6.12.95-1~bpo12+1
    6.12.96-1

    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
    DEBIAN-CVE-2026-80858 | CVE-DB