CVE-2023-53559 — Use After Free in Linux

CWE-416 — Use After FreeCWE-825 — Expired Pointer Dereference5 documents5 sources
Severity
7.8HIGHNVD
EPSS
0.0%
top 96.97%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
LinuxLinux KernelDebian Linux
Timeline
PublishedOct 4

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 …

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HExploitability: 1.8 | Impact: 5.9

Affected Packages4 packages

▶NVDlinux/linux_kernel3.19.1 — 4.14.324+8
▶Debianlinux/linux_kernel< 5.10.197-1+3
▶CVEListV5linux/linuxf855691975bb06373a98711e4cfe2c224244b536 — 82fb41c5de243e7dfa90f32ca58e35adaff56c1d+8
▶debiandebian/linux< linux 6.1.52-1 (bookworm)

Patches

Patch: git.kernel.org ↗Patch: git.kernel.org ↗Patch: git.kernel.org ↗

🔴Vulnerability Details

2
OSV
CVE-2023-53559: 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↗2025-10-04
▶
GHSA
GHSA-6v4x-gf5x-r6w5: 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↗2025-10-04
▶

📋Vendor Advisories

2
Red Hat
kernel: ip_vti: fix potential slab-use-after-free in decode_session6↗2025-10-04
▶
Debian
CVE-2023-53559: linux - In the Linux kernel, the following vulnerability has been resolved: ip_vti: fix...↗2023
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