High severity · published Jul 16, 2026
CVE-2026-48863
Libsolv: stack-based buffer overflow in libsolv eddsa pgp signature verification allows denial of service
7.5
CVSS
0.8%
EPSS
No
On KEV
Description
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.8% · higher than 57% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
libsolv · OpenSUSE
0.6.4 before 0.7.38 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-48863
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-48863
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-48863
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2460975
github.com
https://github.com/openSUSE/libsolv/commit/44f8c085045b1f771641091bbb2b810d12cff9e8#diff-309f245ec9b669ec78b8159c39e6f50130b4d4a0448f742685f7833d04bc4caaR592
security.access.redhat.com
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48863.json
More from libsolv
7.8
CVE-2026-48864
Libsolv: heap buffer overflow in libsolv repopagestore via unchecked decompression of malicious .solv page data
7.5
CVE-2021-33938
Buffer overflow vulnerability in function prune_to_recommended in src/policy.c in libsolv before 0.7.17 allows attackers to cause a Denial of Service
7.5
CVE-2021-33930
Buffer overflow vulnerability in function pool_installable_whatprovides in src/repo.h in libsolv before 0.7.17 allows attackers to cause a Denial of Service
7.5
CVE-2021-33929
Buffer overflow vulnerability in function pool_disabled_solvable in src/repo.h in libsolv before 0.7.17 allows attackers to cause a Denial of Service
7.5
CVE-2021-33928
Buffer overflow vulnerability in function pool_installable in src/repo.h in libsolv before 0.7.17 allows attackers to cause a Denial of Service