CVE-2025-0838

What it is

There exists a heap buffer overflow vulnerable in Abseil-cpp. The sized constructors, reserve(), and rehash() methods of absl::{flat,node}hash{set,map} did not impose an upper bound on their size argument. As a result, it was possible for a caller to pass a very large size that would cause an integer overflow when computing the size of the container's backing store, and a subsequent out-of-bounds memory write. Subsequent accesses to the container might also access out-of-bounds memory. We recommend upgrading past commit 5a0e2cb5e3958dd90bb8569a2766622cb74d90c1

At a glance

Exploitability

Can be exploited from the same network segment with a low-privilege account, but needs a user to act. High risk of data tampering.

Exploit odds

0.6% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2025-02-21 15:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 08:27 UTC Last updatedMost recent change to the record

Details

Published

2025-02-21 15:15 UTC

Last modified

2026-06-17 08:27 UTC

Exploit probability

0.6% · EPSS, next 30 days

Weakness

CWE-190 · Integer overflow

Record status

Analyzed

Affected

• Abseil Common Libraries < 20250127.0
• Debian Linux 11.0

Attack profile CVSS 4.0 · 5.9

Attack vector

Adjacent network

Complexity

High

Attack requirements

Present

Privileges needed

Low

User interaction

Active

Confidentiality

Low

Integrity

High

Availability

Low