CVE-2024-2398

CVE-2024-2398 is a high-severity vulnerability in Haxx Curl with a CVSS 3.x base score of 8.6. Its EPSS exploit-prediction score of 36% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-772.

Key facts

Description

When an application tells libcurl it wants to allow HTTP/2 server push, and the amount of received headers for the push surpasses the maximum allowed limit (1000), libcurl aborts the server push. When aborting, libcurl inadvertently does not free all the previously allocated headers and instead leaks the memory. Further, this error condition fails silently and is therefore not easily detected by an application.

Frequently asked questions

What is CVE-2024-2398?
When an application tells libcurl it wants to allow HTTP/2 server push, and the amount of received headers for the push surpasses the maximum allowed limit (1000), libcurl aborts the server push. When aborting, libcurl inadvertently does not free all the previously allocated headers and instead leaks the memory. Further, this error condition fails silently and is therefore not easily detected by an application.
How severe is CVE-2024-2398?
CVE-2024-2398 has a CVSS 3.x base score of 8.6, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity low, and availability low.
Is CVE-2024-2398 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 36% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2024-2398?
CVE-2024-2398 primarily affects Haxx Curl. In total, 15 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2024-2398?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2024-2398 have an EU (EUVD) identifier?
Yes. CVE-2024-2398 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2024-27350.
When was CVE-2024-2398 published?
CVE-2024-2398 was published on 2024-03-27 and last updated on 2026-06-17.

References

Affected products (15)

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