CVE-2022-30592Public exploitNetwork attack vector

Unauthenticated crash via undersized QPACK table capacity

Published May 11, 2022 · Updated Aug 3, 2024

NULL pointer dereference in LiteSpeed QUIC before 3.1.0 allows remote attackers to crash an HTTP/3 endpoint via MAX_TABLE_CAPACITY below 32. In lsquic_qenc_hdl.c, lsquic_qeh_settings passes a peer-derived dynamic-table size below 32 to lsqpack_enc_init instead of disabling the table. Remote attackers need only complete enough of an HTTP/3 connection to supply the setting; exploitation interrupts the affected process without demonstrated data access or code execution.

CVSS severity9.8
Critical
EPSS probability3.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in LiteSpeed QUIC before 3.1.0 allows remote attackers to crash an HTTP/3 endpoint via MAX_TABLE_CAPACITY below 32. In lsquic_qenc_hdl.c, lsquic_qeh_settings passes a peer-derived dynamic-table size below 32 to lsqpack_enc_init instead of disabling the table. Remote attackers need only complete enough of an HTTP/3 connection to supply the setting; exploitation interrupts the affected process without demonstrated data access or code execution.

The record

CVE
CVE-2022-30592
Published
May 11, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 11, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.5NIST NVDAV:N/AC:L/Au:N/C:P/I:P/A:P
9.8NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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