CVE-2026-53006
Received Received - Intake
Use-After-Free in Linux Kernel IPv6 ICMPv6 Handler

Publication date: 2026-06-24

Last updated on: 2026-06-24

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: ipv6: fix possible UAF in icmpv6_rcv() Caching saddr and daddr before pskb_pull() is problematic since skb->head can change. Remove these temporary variables: - We only access &ipv6_hdr(skb)->saddr and &ipv6_hdr(skb)->daddr when net_dbg_ratelimited() is called in the slow path. - Avoid potential future misuse after pskb_pull() call.
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Meta Information
Published
2026-06-24
Last Modified
2026-06-24
Generated
2026-06-25
AI Q&A
2026-06-24
EPSS Evaluated
N/A
NVD
CVE-2026-53006
EUVD
EUVD-2026-38874
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability is a use-after-free (UAF) issue in the Linux kernel's IPv6 implementation, specifically in the icmpv6_rcv() function. The problem arises because the source and destination addresses (saddr and daddr) are cached before a call to pskb_pull(), which can change the skb->head pointer. This caching can lead to accessing invalid memory, causing a potential use-after-free condition.

The fix involves removing these temporary cached variables and only accessing the IPv6 header addresses when net_dbg_ratelimited() is called in the slow path, thereby avoiding misuse after pskb_pull() is called.

Impact Analysis

A use-after-free vulnerability in the kernel can lead to system instability, crashes, or potentially allow an attacker to execute arbitrary code with kernel privileges. This can compromise the security and reliability of the affected system.

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