CVE-2023-53600

HIGH EPSS 3.4%
Published Oct 4, 20258mo ago · Modified Jun 17, 20261w ago
7.1 CVSS 3.1
High
Find Similar
Published Oct 4, 2025 8mo ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: tunnels: fix kasan splat when generating ipv4 pmtu error If we try to emit an icmp error in response to a nonliner skb, we get BUG: KASAN: slab-out-of-bounds in ip_compute_csum+0x134/0x220 Read of size 4 at addr ffff88811c50db00 by task iperf3/1691 CPU: 2 PID: 1691 Comm: iperf3 Not tainted 6.5.0-rc3+ #309 [..] kasan_report+0x105/0x140 ip_compute_csum+0x134/0x220 iptunnel_pmtud_build_icmp+0x554/0x1020 skb_tunnel_check_pmtu+0x513/0xb80 vxlan_xmit_one+0x139e/0x2ef0 vxlan_xmit+0x1867/0x2760 dev_hard_start_xmit+0x1ee/0x4f0 br_dev_queue_push_xmit+0x4d1/0x660 [..] ip_compute_csum() cannot deal with nonlinear skbs, so avoid it. After this change, splat is gone and iperf3 is no longer stuck.

CVSS Details

Base Score
7.1
Exploitability
1.8
Impact
5.2
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
3.4% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-125 Out-of-bounds Read Memory Safety

Affected Products 9

VendorProductVersionRange
linuxlinux_kernel*≥5.9  –  <5.10.191
linuxlinux_kernel*≥5.11  –  <5.15.127
linuxlinux_kernel*≥5.16  –  <6.1.46
linuxlinux_kernel*≥6.2  –  <6.4.11
linuxlinux_kernel6.5any
linuxlinux_kernel6.5any
linuxlinux_kernel6.5any
linuxlinux_kernel6.5any
linuxlinux_kernel6.5any

References 5

  • git.kernel.org https://git.kernel.org/stable/c/5850c391fd7e25662334cb3cbf29a62bcbff1084
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6a7ac3d20593865209dceb554d8b3f094c6bd940
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/da5f42a6e7485fbb7a6dbd6a2b3045e19e4df5cc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e95808121953410db8c59f0abfde70ac0d34222c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fe6a9f7516735be9fdabab00e47ef7a3403a174d
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/5850c391fd7e25662334cb3cbf29a62bcbff1084
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6a7ac3d20593865209dceb554d8b3f094c6bd940
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/da5f42a6e7485fbb7a6dbd6a2b3045e19e4df5cc
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e95808121953410db8c59f0abfde70ac0d34222c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fe6a9f7516735be9fdabab00e47ef7a3403a174d
    Patch