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    CVE-2024-26665

    In the Linux kernel, the following vulnerability has been resolved: tunnels: fix out of bounds access when building IPv6 PMTU error If the ICMPv6 error is built from a non-linear skb we get the following splat, BUG: KASAN: slab-out-of-bounds in do_csum+0x220/0x240 Read of size 4 at addr ffff88811d402c80 by task netperf/820 CPU: 0 PID: 820 Comm: netperf Not tainted 6.8.0-rc1+ #543 ... kasan_report+0xd8/0x110 do_csum+0x220/0x240 csum_partial+0xc/0x20 skb_tunnel_check_pmtu+0xeb9/0x3280 vxlan_xmit_one+0x14c2/0x4080 vxlan_xmit+0xf61/0x5c00 dev_hard_start_xmit+0xfb/0x510 __dev_queue_xmit+0x7cd/0x32a0 br_dev_queue_push_xmit+0x39d/0x6a0 Use skb_checksum instead of csum_partial who cannot deal with non-linear SKBs.

    Published:Apr 2, 2024
    Last Modified:Aug 4, 2026
    EPS:Apr 2, 2024
    EPSS Score:0.00237
    CVSS Score:9.1

    Affected Products

    Vendor
    Debian
    Product
    Debian Linux
    Vendor
    Linux
    Product
    Linux Kernel
    Vendor
    Redhat
    Product
    Enterprise Linux
    Vendor
    Redhat
    Product
    Rhel Eus

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-125 Out-of-bounds Read

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-540 Overread Buffers

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    References

    https://git.kernel.org/stable/c/510c869ffa4068c5f19ff4df51d1e2f3a30aaac1
    https://git.kernel.org/stable/c/7dc9feb8b1705cf00de20563b6bc4831f4c99dab
    https://git.kernel.org/stable/c/d75abeec401f8c86b470e7028a13fcdc87e5dd06
    https://git.kernel.org/stable/c/d964dd1bc1452594b4207d9229c157d9386e5d8a
    https://git.kernel.org/stable/c/e37cde7a5716466ff2a76f7f27f0a29b05b9a732
    https://git.kernel.org/stable/c/e77bf828f1ca1c47fcff58bdc26b60a9d3dfbe1d
    https://git.kernel.org/stable/c/510c869ffa4068c5f19ff4df51d1e2f3a30aaac1
    https://git.kernel.org/stable/c/7dc9feb8b1705cf00de20563b6bc4831f4c99dab
    https://git.kernel.org/stable/c/d75abeec401f8c86b470e7028a13fcdc87e5dd06
    https://git.kernel.org/stable/c/d964dd1bc1452594b4207d9229c157d9386e5d8a
    https://git.kernel.org/stable/c/e37cde7a5716466ff2a76f7f27f0a29b05b9a732
    https://git.kernel.org/stable/c/e77bf828f1ca1c47fcff58bdc26b60a9d3dfbe1d
    https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html

    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