🛡️ CVE-2019-25008 — http

🟠 CVSS 8.0 — High ✅ No Known Exploit CWE-190 OSV

8.0

CVSS Score

0 Low4 Medium7 High9 Critical10

Description

Duplicate Advisory: Integer Overflow in HeaderMap::reserve() can cause Denial of Service

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-x7vr-c387-8w57. This link is maintained to preserve external references.

Original Description

HeaderMap::reserve() used usize::next_power_of_two() to calculate the increased capacity. However, next_power_of_two() silently overflows to 0 if given a sufficiently large number in release mode.

If the map was not empty when the overflow happens, the library will invoke self.grow(0) and start infinite probing. This allows an attacker who controls the argument to reserve() to cause a potential denial of service (DoS).

The flaw was corrected in 0.1.20 release of http crate.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. No user interaction is required. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality none, integrity none, availability high.

Weakness class

CVE-2019-25008 is classified as CWE-190: Integer Overflow or Wraparound. Arithmetic produces a value too large for its type and wraps around, so a later size or bounds check passes when it should not.

Affected software

CVE-2019-25008 is recorded against 1 package.

http

Timeline and source

Published on 25 August 2021 and last revised on 4 February 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

nvd.nist.gov (Advisory)
github.com (Web)
github.com (Package)
rustsec.org (Web)

Details

Severity HIGH

CVSS Score 8.0

CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE CWE-190

Public Exploit ✅ No

Source OSV

Published 2021-08-25

Updated 2026-08-12

Modified 2026-02-04

Fix URL N/A

Affected Packages

Software	From version	Fixed in
http	—	—

References

ADVISORY https://nvd.nist.gov/vuln/detail/CVE-2020-25574

WEB https://github.com/hyperium/http/issues/352

PACKAGE https://github.com/hyperium/http

WEB https://rustsec.org/advisories/RUSTSEC-2019-0033.html

🔗 NVD 🔗 Mitre

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