CVE-2023-53559

HIGH EPSS 3.4%
Published Oct 4, 20259mo ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
High
Find Similar
Published Oct 4, 2025 9mo ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: ip_vti: fix potential slab-use-after-free in decode_session6 When ip_vti device is set to the qdisc of the sfb type, the cb field of the sent skb may be modified during enqueuing. Then, slab-use-after-free may occur when ip_vti device sends IPv6 packets. As commit f855691975bb ("xfrm6: Fix the nexthdr offset in _decode_session6.") showed, xfrm_decode_session was originally intended only for the receive path. IP6CB(skb)->nhoff is not set during transmission. Therefore, set the cb field in the skb to 0 before sending packets.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

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

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 15

VendorProductVersionRange
linuxlinux_kernel*≥3.19.1  –  <4.14.324
linuxlinux_kernel*≥4.15  –  <4.19.293
linuxlinux_kernel*≥4.20  –  <5.4.255
linuxlinux_kernel*≥5.5  –  <5.10.192
linuxlinux_kernel*≥5.11  –  <5.15.128
linuxlinux_kernel*≥5.16  –  <6.1.47
linuxlinux_kernel*≥6.2  –  <6.4.12
linuxlinux_kernel3.19any
linuxlinux_kernel3.19any
linuxlinux_kernel6.5any
linuxlinux_kernel6.5any
linuxlinux_kernel6.5any
linuxlinux_kernel6.5any
linuxlinux_kernel6.5any
linuxlinux_kernel6.5any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/0b4d69539fdea138af2befe08893850c89248068
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2b05bf5dc437f7891dd409a3eaf5058459391c7a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6018a266279b1a75143c7c0804dd08a5fc4c3e0b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/78e397a43e1c47321a4679cc49a6c4530bf820b9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7dfe23659f3677c08a60a0056cda2d91a79c15ca
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/82fb41c5de243e7dfa90f32ca58e35adaff56c1d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d34c30442d5e53a33cde79ca163320dbe2432cbd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e1e04cc2ef2c0c0866c19f5627149a76c2baae32
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/0b4d69539fdea138af2befe08893850c89248068
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/2b05bf5dc437f7891dd409a3eaf5058459391c7a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6018a266279b1a75143c7c0804dd08a5fc4c3e0b
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/78e397a43e1c47321a4679cc49a6c4530bf820b9
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/7dfe23659f3677c08a60a0056cda2d91a79c15ca
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/82fb41c5de243e7dfa90f32ca58e35adaff56c1d
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d34c30442d5e53a33cde79ca163320dbe2432cbd
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e1e04cc2ef2c0c0866c19f5627149a76c2baae32
    Patch