CVE-2023-53500 — Use After Free in Linux

CWE-416 — Use After FreeCWE-664 — Improper Control of a Resource Through its Lifetime5 documents5 sources
Severity
7.8HIGHNVD
EPSS
0.0%
top 96.83%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
LinuxLinux KernelDebian Linux
Timeline
PublishedOct 1

Description

In the Linux kernel, the following vulnerability has been resolved: xfrm: fix slab-use-after-free in decode_session6 When the xfrm 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 the xfrm device sends IPv6 packets. The stack information is as follows: BUG: KASAN: slab-use-after-free in decode_session6+0x103f/0x1890 Read of size 1 at addr ffff8881111458ef by task swapper/3/0 CPU: 3 PID: 0 Comm: …

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 — 4.19.293+7
▶Debianlinux/linux_kernel< 5.10.197-1+3
▶CVEListV5linux/linuxf855691975bb06373a98711e4cfe2c224244b536 — da4cbaa75ed088b6d70db77b9103a27e2359e243+7
▶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-2023-53500: In the Linux kernel, the following vulnerability has been resolved: xfrm: fix slab-use-after-free in decode_session6 When the xfrm device is set to th↗2025-10-01
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GHSA
GHSA-hx6j-r6x5-73w3: In the Linux kernel, the following vulnerability has been resolved: xfrm: fix slab-use-after-free in decode_session6 When the xfrm device is set to↗2025-10-01
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📋Vendor Advisories

2
Red Hat
kernel: xfrm: fix slab-use-after-free in decode_session6↗2025-10-01
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Debian
CVE-2023-53500: linux - In the Linux kernel, the following vulnerability has been resolved: xfrm: fix s...↗2023
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