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CVE-2026-53002 is a stack out-of-bounds write in the Linux kernel Netfilter conntrack SIP/SDP NAT-processing path. Unsafe sprintf formatting in mangle_content_len() can exceed a stack buffer while processing SIP/SDP content-length data, producing a KASAN-detected write in vsnprintf. The vulnerable call path includes nf_nat_sdp_session(), SDP processing, SIP INVITE processing, and the TCP SIP helper. The upstream correction replaces sprintf with bounded scnprintf operations and enlarges the buffer used by mangle_content_len().
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
25 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Unknown
A vulnerability addressed by Ubuntu Security Notice USN-8748-1.
A vulnerability addressed by an AlmaLinux 8 kernel update advisory (RHSA-2026:66000).
An unspecified Linux kernel vulnerability addressed for Red Hat Enterprise Linux 9.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.