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Public proof of conceptFix available

CVE-2024-53259

A public proof of concept exists; no exploitation attested.

  • Published2024-12-02
  • Fixed in0.48.2
  • WeaknessCWE-345

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

quic-go is an implementation of the QUIC protocol in Go. An off-path attacker can inject an ICMP Packet Too Large packet. Since affected quic-go versions used IP_PMTUDISC_DO, the kernel would then return a "message too large" error on sendmsg, i.e. when quic-go attempts to send a packet that exceeds the MTU claimed in that ICMP packet. By setting this value to smaller than 1200 bytes (the minimum MTU for QUIC), the attacker can disrupt a QUIC connection. Crucially, this can be done after completion of the handshake, thereby circumventing any TCP fallback that might be implemented on the application layer (for example, many browsers fall back to HTTP over TCP if they're unable to establish a QUIC connection). The attacker needs to at least know the client's IP and port tuple to mount an attack. This vulnerability is fixed in 0.48.2.

Timeline

dates in UTC
  1. 2024-12-0217:15CVE publishedNVD
  2. 2026-10-2319:23First public proof of conceptPoC-in-GitHub

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2024-53259?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2024-53259?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

OSV
quic-go/quic-go
BranchAffectedFixed in
0.48< 0.48.20.48.2

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

  • RHSA-2025:4810 Red Hat Product Security36 products fixed

    Red Hat Security Advisory: RHSA: Submariner 0.18.5 - bug and security update

  • RHSA-2025:4250 Red Hat Product Security36 products fixed

    Red Hat Security Advisory: RHSA: Submariner 0.19.4 - bug fix and enhancement update

  • RHSA-2025:0386 Red Hat Product Security5 products fixed

    Red Hat Security Advisory: VolSync 0.10.2 for RHEL 9

  • RHSA-2025:0385 Red Hat Product Security5 products fixed

    Red Hat Security Advisory: VolSync 0.11.1 for RHEL 9

Full record on NVD

Fix

  1. Update quic-go/quic-go to 0.48.2
  2. Vendor fix Red Hat Product Security RHSA-2025:4810 · 36 productsTo learn more about Submariner, see https://docs.redhat.com/en/documentation/red_hat_advanced_cluster_management_for_kubernetes/2.11/html/networking/networking#submariner.
  3. Vendor fix Red Hat Product Security RHSA-2025:4250 · 36 productsTo learn more about Submariner, see https://docs.redhat.com/en/documentation/red_hat_advanced_cluster_management_for_kubernetes/2.12/html/networking/networking#submariner.
  4. Vendor fix Red Hat Product Security RHSA-2025:0386 · 5 productsFor more details, see the Red Hat Advanced Cluster Management for Kubernetes documentation: https://docs.redhat.com/documentation/en-us/red_hat_advanced_cluster_management_for_kubernetes/2.12/html/business_continuity/business-cont-overview#volsync
  5. Workaround from the vendor Red Hat Product Security RHSA-2025:4810 · 36 productsUse iptables to drop ICMP unreachable packets.

Detection

read 2026-10-23 19:24 UTC
Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
1 repository, unverifiedkota-yata/cve-2024-53259
PoC-in-GitHub

Sources

  • NVDCVE recordread 2026-10-23
  • CISA-ADPSSVC decisionnone2024-12-02
  • OpenCVESSVC decisionnone—
  • CNACVSS 3.16.5read 2026-10-23
  • CNAweakness (CWE)CWE-345read 2026-10-23
  • FIRST EPSSEPSS score0.6 %2026-10-23
  • PoC-in-GitHubproof of concept1read 2026-10-23
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
2024-12-02
Last Modified
2026-06-17
NVD status
Deferred

Frequently asked questions

What is CVE-2024-53259?

quic-go is an implementation of the QUIC protocol in Go. An off-path attacker can inject an ICMP Packet Too Large packet. Since affected quic-go versions used IP_PMTUDISC_DO, the kernel would then return a "message too large" error on sendmsg, i.e. when quic-go attempts to send a packet that exceeds the MTU claimed in that ICMP packet. By setting this value to smaller than 1200 bytes (the minimum MTU for QUIC), the attacker can disrupt a QUIC connection. Crucially, this can be done after completion of the handshake, thereby circumventing any TCP fallback that might be implemented on the application layer (for example, many browsers fall back to HTTP over TCP if they're unable to establish a QUIC connection). The attacker needs to at least know the client's IP and port tuple to mount an attack. This vulnerability is fixed in 0.48.2.

Is CVE-2024-53259 actively exploited?

Active exploitation of CVE-2024-53259 has not been confirmed. Its EPSS score was 0.6% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2024-53259?

CVE-2024-53259 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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