Medium
HTTP/2 push headers memory-leak
Type: advisorySources: OSV
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2024-2398
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 16:54 UTC · Revision 1
Source evidence
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.
osv:CURL-CVE-2024-2398
Complete source record
{
"id": "d90ae76a10559e5edf83d81928b9ea9b6ca0e5ef7c777d181697c7e4beb42397",
"url": "https://osv.dev/vulnerability/CURL-CVE-2024-2398",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "HTTP/2 push headers memory-leak",
"summary": "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.",
"evidence": "osv:CURL-CVE-2024-2398",
"products": [],
"severity": "medium",
"structured": {
"id": "CURL-CVE-2024-2398",
"aliases": [
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"CVE-2024-2398"
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"database_specific": {
"source": "https://curl.se/docs/CURL-CVE-2024-2398.json",
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"function": "push_promise"
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"modified": "2026-10-27T01:28:36.656854120Z",
"provider": "osv",
"references": [],
"provider_metadata": {
"CWE": {
"id": "CWE-772",
"desc": "Missing Release of Resource after Effective Lifetime"
},
"URL": "https://curl.se/docs/CVE-2024-2398.json",
"www": "https://curl.se/docs/CVE-2024-2398.html",
"award": {
"amount": "2540",
"currency": "USD"
},
"issue": "https://hackerone.com/reports/2402845",
"affects": "lib",
"package": "curl",
"severity": "Medium",
"last_affected": "8.6.0"
}
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"source_id": "core-osv",
"document_id": 459161,
"published_at": "2024-03-27T08:00:00+00:00"
}