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NVD / CVE Program· CNA redhat

CVE-2026-48863: Libsolv: stack-based buffer overflow in libsolv eddsa pgp signature verification allows denial of service

Noroxi assessment

Priority: Monitor (action score 30/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.82% (FIRST EPSS); higher than 57.3% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: OpenSUSE libsolv 0.7.38; azl3 libsolv 0.7.28-4 on Azure Linux 3.0 0.7.28-5.

Low priority for now. Upgrade to OpenSUSE libsolv 0.7.38; azl3 libsolv 0.7.28-4 on Azure Linux 3.0 0.7.28-5 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

A flaw was found in libsolv. A stack-based buffer overflow vulnerability exists in the PGP verification component due to incorrect length handling when copying EdDSA 's' MPI into a stack buffer. A remote attacker could craft a malicious Ed25519 PGP signature with mismatched MPI lengths. Processing this crafted signature could lead to a denial of service in automated package or repository processing workflows.

HighCVSS 7.5 · v3.1—No exploit Fix available
Published
Jul 15, 2026
Updated
Sep 1, 2026
EPSS
0.8% · 57th percentile

Report tools

JSON

Action score

30

Monitor

Low priority for now.

CVSS
30 / 40 · 7.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.8%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · redhat
7.5
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-48863

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
enterprise linux10
enterprise linux7
enterprise linux8
enterprise linux9
hummingbird1
openshift4
satellite6
rhui4

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • OpenSUSE libsolv

    • 0.6.4 and later · before 0.7.38affected · semver

  • Red Hat Red Hat Enterprise Linux 10

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 7

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 8

    • all versionsunknown

  • Red Hat Red Hat Enterprise Linux 9

    • all versionsunknown

  • Red Hat Red Hat Hardened Images

    • all versionsunknown

  • Red Hat Red Hat OpenShift Container Platform 4

    • all versionsunknown
    • all versionsunknown

  • Red Hat Red Hat Satellite 6

    • all versionsunknown

  • Red Hat Red Hat Update Infrastructure 4 for Cloud Providers

    • all versionsunknown

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12libsolvfrom 0—
Debian:14libsolvbefore 0.7.38-10.7.38-1
openSUSE:Leap 16.0libsolvbefore 0.7.39-160000.1.10.7.39-160000.1.1
openSUSE:Leap 16.0libzyppbefore 17.38.13-160000.1.117.38.13-160000.1.1
openSUSE:Leap 16.0zypperbefore 1.14.98-160000.1.11.14.98-160000.1.1
openSUSE:Tumbleweedlibsolvbefore 0.7.38-1.10.7.38-1.1
SUSE:Linux Enterprise Installer Updates 15 SP4libsolvbefore 0.7.39-150400.3.46.10.7.39-150400.3.46.1
SUSE:Linux Enterprise Installer Updates 15 SP4libzyppbefore 17.38.13-150400.3.158.117.38.13-150400.3.158.1
SUSE:Linux Enterprise Installer Updates 15 SP5libsolvbefore 0.7.39-150500.6.17.10.7.39-150500.6.17.1
SUSE:Linux Enterprise Installer Updates 15 SP5libzyppbefore 17.38.13-150500.6.74.117.38.13-150500.6.74.1
SUSE:Linux Enterprise Installer Updates 15 SP6libsolvbefore 0.7.39-150600.8.24.10.7.39-150600.8.24.1
SUSE:Linux Enterprise Installer Updates 15 SP6libzyppbefore 17.38.13-150600.3.92.117.38.13-150600.3.92.1
SUSE:Linux Enterprise Micro 5.3zypperbefore 1.14.98-150400.3.104.11.14.98-150400.3.104.1
SUSE:Linux Enterprise Micro 5.5zypperbefore 1.14.98-150500.6.45.11.14.98-150500.6.45.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7libsolvbefore 0.7.39-150700.11.10.10.7.39-150700.11.10.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7libzyppbefore 17.38.13-150700.6.13.117.38.13-150700.6.13.1
SUSE:Linux Enterprise Module for Basesystem 15 SP7zypperbefore 1.14.98-150700.13.6.11.14.98-150700.13.6.1
SUSE:Linux Enterprise Server 15 SP6-LTSSzypperbefore 1.14.98-150600.10.55.11.14.98-150600.10.55.1
SUSE:Linux Enterprise Server 16.0libsolvbefore 0.7.39-160000.1.10.7.39-160000.1.1
SUSE:Linux Enterprise Server 16.0libzyppbefore 17.38.13-160000.1.117.38.13-160000.1.1
SUSE:Linux Enterprise Server 16.0zypperbefore 1.14.98-160000.1.11.14.98-160000.1.1

Same product

opensuse: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-48864Libsolv: heap buffer overflow in libsolv repopagestore via unchecked decompression of malicious .solv page data
    31Monitor
  • CVE-2019-20387repodata_schema2id in repodata.c in libsolv before 0.7.6 has a heap-based buffer over-read via a last schema whose length is less than the l
    31Monitor
  • CVE-2021-33938Buffer overflow vulnerability in function prune_to_recommended in src/policy.c in libsolv before 0.7.17 allows attackers to cause a Denial o
    30Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2021-44568Feb 21, 2022 · Two heap-overflow vulnerabilities exist in openSUSE/libsolv libsolv through 13 Dec 2020 in the decisionmap variable via the resolve_dependen
    27Monitor
  • ← EarlierCVE-2026-9150May 20, 2026 · Libsolv: stack-based buffer overflow in libsolv's debian metadata parser when handling sha384/sha512 checksums
    26Monitor
  • ← EarlierCVE-2026-9149May 20, 2026 · Libsolv: heap buffer overflow in libsolv repo_add_solv via negative maxsize from crafted .solv file
    26Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
OpenSUSE libsolv0.7.38Vendor (CNA)
azl3 libsolv 0.7.28-4 on Azure Linux 3.00.7.28-5 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:libsolv0.7.38-1 · Debian:14Package registry (OSV)
opensuse:libsolv0.7.38-1.1 · openSUSE:TumbleweedPackage registry (OSV)
opensuse:libzypp17.38.13-160000.1.1 · openSUSE:Leap 16.0Package registry (OSV)
opensuse:zypper1.14.98-160000.1.1 · openSUSE:Leap 16.0Package registry (OSV)
suse:libsolv0.7.39-160000.1.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:libzypp17.38.13-160000.1.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:zypper1.14.98-160000.1.1 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-915056 days apartLibsolv: stack-based buffer overflow in libsolv's debian metadata parser when handling sha384/sha512 checksums
    26Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-121 · Stack-based Buffer Overflow

CVSS vector

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

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records