Skip to content
Fencer Vulns
critical 9.8

CVE-2025-0838 json

Heap Buffer overflow in Abseil

published 2025-02-21 20 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-4520

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.6%
EPSS 0.6% chance of exploitation in 30 days, percentile 50%
public exploits
0
none known

Summary

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

Patch / fix

  • abseil common_libraries 20250127.0
  • abseil Debian 12 20220623.1-1+deb12u1
  • abseil Debian 14, Debian 13 20240722.0-3

debian advisories DEBIAN-CVE-2025-0838

  • abseil Ubuntu 22.04 LTS 0~20210324.2-2ubuntu0.2
  • abseil Ubuntu 24.04 LTS 20220623.1-3.1ubuntu3.2
  • abseil Ubuntu 25.10 20240722.0-3ubuntu1

ubuntu advisories UBUNTU-CVE-2025-0838

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • abseil-cpp SLE Micro 5.3 20230802.3-150400.10.7.1
  • abseil-cpp SLE Micro 5.5, SLE Micro 5.4 20240116.3-150500.13.10.1
  • abseil-cpp SLE Module for Basesystem 15 SP7, openSUSE Leap 15.6 20240116.3-150600.19.6.1
  • abseil-cpp Linux Micro 6.1 20230802.3-slfo.1.1_1.1
  • abseil-cpp Linux Micro 6.0 20230802.3-1.1
  • abseil-cpp SLES LTSS Extended Security 12 SP5 20240116.3-8.6.1

suse advisories SUSE-SU-2026:0576-1SUSE-SU-2026:0412-1SUSE-SU-2026:0381-1SUSE-SU-2026:0338-1SUSE-SU-2026:20361-1SUSE-SU-2026:20268-1

  • abseil-cpp openSUSE Tumbleweed 20250814.0-2.1

opensuse advisories openSUSE-SU-2025:15473-1

  • abseil-cpp CBL-Mariner 2.0 20220623.0-2
  • abseil-cpp Azure Linux 3.0 20240116.0-3
  • mysql Azure Linux 3.0 8.0.45-2

azure linux advisories AZL-76815AZL-76853AZL-77043

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-0838 updated cvss 5.6

abseil-cpp: Heap Buffer overflow in Abseil

  • Red Hat Enterprise Linux AI (RHEL AI) libpdfium
    affected: workaround, no fix available “Fix deferred”

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
20 mo ago

Exploit prediction

0.63% chance of exploitation in the next 30 days, higher than 50% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 4.0 5.9 CVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:A/VC:L/VI:H/VA:L/SC:L/SI:H/SA:L
CNA 4.0 5.9 CVSS:4.0/AV:A/AC:H/AT:P/PR:L/UI:A/VC:L/VI:H/VA:L/SC:L/SI:H/SA:L/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

  • abseil abseil-cpp

Classification

Weakness
  • CWE-190 Integer Overflow or Wraparound

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.