CVE-2026-53002
Received Received - Intake
Buffer Overflow in Linux Kernel Netfilter Conntrack

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: netfilter: conntrack: remove sprintf usage Replace it with scnprintf, the buffer sizes are expected to be large enough to hold the result, no need for snprintf+overflow check. Increase buffer size in mangle_content_len() while at it. BUG: KASAN: stack-out-of-bounds in vsnprintf+0xea5/0x1270 Write of size 1 at addr [..] vsnprintf+0xea5/0x1270 sprintf+0xb1/0xe0 mangle_content_len+0x1ac/0x280 nf_nat_sdp_session+0x1cc/0x240 process_sdp+0x8f8/0xb80 process_invite_request+0x108/0x2b0 process_sip_msg+0x5da/0xf50 sip_help_tcp+0x45e/0x780 nf_confirm+0x34d/0x990 [..]
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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-2026-53002
EUVD
EUVD-2026-38870
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *
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Exploitability
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CWE ID Description
CWE-UNKNOWN
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Executive Summary

This vulnerability exists in the Linux kernel's netfilter conntrack component. It involves the unsafe use of the sprintf function, which was replaced with scnprintf to prevent buffer overflow issues. The problem was related to a stack-out-of-bounds write caused by vsnprintf and sprintf usage in the code, specifically in functions like mangle_content_len and nf_nat_sdp_session.

Impact Analysis

The vulnerability could lead to a stack-out-of-bounds write, which may cause memory corruption. This can potentially be exploited to crash the system or execute arbitrary code with kernel privileges, leading to system instability or compromise.

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