CVE-2024-26665

HighCVSS 7.1/10Last modified Aug 4, 2026

Description

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.

Metrics

CVSS 3.1 7.1/10CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Weakness enumeration

CWE-125

Affected software

VendorProductVersions
LinuxLinux>= 4cb47a8644cc9eb8ec81190a50e79e6530d0297f, < e77bf828f1ca1c47fcff58bdc26b60a9d3dfbe1d; >= 4cb47a8644cc9eb8ec81190a50e79e6530d0297f, < d964dd1bc1452594b4207d9229c157d9386e5d8a; >= 4cb47a8644cc9eb8ec81190a50e79e6530d0297f, < e37cde7a5716466ff2a76f7f27f0a29b05b9a732; >= 4cb47a8644cc9eb8ec81190a50e79e6530d0297f, < 510c869ffa4068c5f19ff4df51d1e2f3a30aaac1; >= 4cb47a8644cc9eb8ec81190a50e79e6530d0297f, < 7dc9feb8b1705cf00de20563b6bc4831f4c99dab; >= 4cb47a8644cc9eb8ec81190a50e79e6530d0297f, < d75abeec401f8c86b470e7028a13fcdc87e5dd06
LinuxLinux5.9

References

Timeline

Published
Apr 2, 2024
Last modified
Aug 4, 2026
NVD status
Modified

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CVE-2024-26665: High severity, CVSS 7.1 | Vulnix