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HIGH

CVE-2026-48864

Libsolv: heap buffer overflow in libsolv repopagestore via unchecked decompression of malicious .solv page data

CVSS v3

7.8

HIGH

EPSS Score

0.3 %

exploit probability, as of 2026-10-19

CISA KEV

No

known exploited

Exploitation

none

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • libsolvAlmaLinux:10all versions · fixed in 0.7.33-5.el10_2.alma.1and 4 other packages
  • libsolvAlmaLinux:9all versions · fixed in 0.7.24-6.el9_8and 3 other packages
  • libsolvAlmaLinux:8all versions · fixed in 0.7.20-7.el8_10and 3 other packages

Vendor advisories

  • CVE-2026-48864 Red Hat Product Security649 products fixed

    libsolv: Heap buffer overflow in libsolv repopagestore via unchecked decompression of malicious .solv page data

  • RHSA-2026:82888 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.17.2

  • RHSA-2026:82857 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2

  • RHSA-2026:82372 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2

  • RHSA-2026:82354 Red Hat Product Security4 products fixed

    Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2

  • RHSA-2026:82347 Red Hat Product Security8 products fixed

    Red Hat Security Advisory: cert-manager Operator for Red Hat OpenShift 1.18.2

47 more advisories

Full record on NVD

Description

A flaw was found in libsolv. This heap buffer overflow occurs during the decompression of attacker-controlled compressed data within `.solv` files due to insufficient input validation. An attacker can provide a specially crafted `.solv` file, which, when processed by a vulnerable application, can lead to out-of-bounds memory access. This could result in information disclosure, alteration of program execution, or a denial of service.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published
2026-05-26
Last Modified
2026-08-11
MSRC Title
Libsolv: heap buffer overflow in libsolv repopagestore via unchecked decompression of malicious .solv page data

Frequently asked questions

What is CVE-2026-48864?

A flaw was found in libsolv. This heap buffer overflow occurs during the decompression of attacker-controlled compressed data within `.solv` files due to insufficient input validation. An attacker can provide a specially crafted `.solv` file, which, when processed by a vulnerable application, can lead to out-of-bounds memory access. This could result in information disclosure, alteration of program execution, or a denial of service.

Is CVE-2026-48864 actively exploited?

Active exploitation of CVE-2026-48864 has not been confirmed. Its EPSS score was 0.3% on 2026-10-19, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2026-48864?

CVE-2026-48864 has a CVSS v3 base score of 7.8 (HIGH severity), with vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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