CVE-2022-3515

Exp

A vulnerability was found in the Libksba library due to an integer overflow within the CRL parser. The vulnerability can be exploited remotely for code execution on the target system by passing specially crafted data to the application, for example, a malicious S/MIME attachment.

Published: 2023-01-12 Last update: 2025-04-08 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2022-3515 is rated High Exploit Risk (67.4/100): CVSS Critical severity, with low exploitation likelihood (EPSS 0.16%). 2 public exploit reference(s) are indexed (Exploit-DB). Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2022-3515

EDB-ID Source Kind Published Link
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2022-3515

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-01-30 0.14% 0.16% +0.02%
2 2025-11-21 1.64% 0.14% -1.50%
3 2025-11-18 — 1.64% —

Full EPSS history (19 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2022-3515

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 [email protected]
9.8 3.1 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:H)
They could widely tamper with or forge data—trust in the data is badly hurt.
Availability (A:H)
Could take the service down hard or make it unusable for people who depend on it.
 3.9 5.9 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2022-3515

OS Trackers for CVE-2022-3515

vendor priority summary link
alpine — CVE-2022-3515: 1 source package rows (libksba); 7 state rows across 7 repos (3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 7, open 0. https://security.alpinelinux.org/vuln/CVE-2022-3515
debian not yet assigned CVE-2022-3515 not yet assigned priority: Debian including 1 source packages (libksba), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2022-3515
gentoo high CVE-2022-3515: 2 GLSA(s) (202210-23, 202212-07), 1 atom(s) (dev-libs/libksba); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2022-3515
redhat high — https://access.redhat.com/security/cve/CVE-2022-3515
suse critical CVE-2022-3515 severity critical: SUSE including 292 source package names (0.58.0.17.143:libksba8-1.3.5-150000.4.3.1, 1.3.0.3.2.248:libksba8-1.3.5-150000.4.3.1, …), 572 product×package rows across 303 product lines (Container bci/bci-init, Container bci/nodejs, … (303 product lines)): Fixed 461, Known Affected 110, Known Not Affected 1. https://www.suse.com/security/cve/CVE-2022-3515/
ubuntu high CVE-2022-3515 high priority: Ubuntu including 1 source packages (libksba), 7 status rows across 7 suites (bionic, focal, jammy, kinetic, trusty, upstream, xenial): released 7. https://ubuntu.com/security/CVE-2022-3515

Affected software / configurations for CVE-2022-3515

Vendor Product Version Raw CPE
gnupg libksba < 1.6.3 cpe:2.3:a:gnupg:libksba:*:*:*:*:*:*:*:*
gpg4win gpg4win >= 2.0.0, < 4.1.0 cpe:2.3:a:gpg4win:gpg4win:*:*:*:*:*:*:*:*
gnupg vs-desktop >= 3.1.16, < 3.1.26 cpe:2.3:a:gnupg:vs-desktop:*:*:*:*:*:*:*:*
gnupg gnupg >= 2.1.0, < 2.2.41 cpe:2.3:a:gnupg:gnupg:*:*:*:*:lts:*:*:*
gnupg gnupg >= 2.3.0, < 2.4.0 cpe:2.3:a:gnupg:gnupg:*:*:*:*:-:*:*:*

References for CVE-2022-3515

cvelogic Threat Intelligence