Instituto Nacional de ciberseguridad. Sección Incibe
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CVE-2023-53559

Severity CVSS v4.0:
Pending analysis
Type:
CWE-416 Use After Free
Publication date:
04/10/2025
Last modified:
21/03/2026

Description

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

Impact

Vector 3.x
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 7.80 HIGH
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Local
Attack Complexity (AC): Low
Privileges Required (PR): Low
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x
7.80
Severity 3.x
HIGH

Vulnerable products and versions

CPE From Up to
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 3.19.1 (including) 4.14.324 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.15 (including) 4.19.293 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 4.20 (including) 5.4.255 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.5 (including) 5.10.192 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.11 (including) 5.15.128 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 5.16 (including) 6.1.47 (excluding)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* 6.2 (including) 6.4.12 (excluding)
cpe:2.3:o:linux:linux_kernel:3.19:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:3.19:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.5:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.5:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.5:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.5:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.5:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:6.5:rc6:*:*:*:*:*:*

To consult the complete list of CPE names with products and versions, see this page


References to Advisories, Solutions, and Tools