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CVE-2024-53259 is a denial-of-service vulnerability in quic-go on Linux. Affected versions use IP_PMTUDISC_DO for path MTU discovery and accept the resulting path-MTU condition after an off-path attacker injects a forged ICMP Packet Too Large message. If the forged message advertises an MTU below QUIC's mandatory 1200-byte minimum, subsequent attempts by quic-go to send a larger packet cause the kernel to return a "message too large" error from sendmsg. This disrupts an already established QUIC connection and can bypass application-layer TCP fallback logic that is only invoked when QUIC connection establishment fails.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
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.
6 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An ICMP Packet Too Large injection vulnerability affecting quic-go on Linux, addressed in the Submariner 0.19.4 security update.
An ICMP Packet Too Large injection vulnerability affecting quic-go on Linux.
An ICMP Packet Too Large injection attack vulnerability affecting quic-go on Linux, remediated in the VolSync 0.11.1 container-image update.
An ICMP Packet Too Large injection vulnerability affecting quic-go on Linux.
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.