CVE-2020-29361 [High] | Integer Overflow in P11-Kit

An issue was discovered in p11-kit 0.21.1 through 0.23.21. Multiple integer overflows have been discovered in the array allocations in the p11-kit library and the p11-kit list command, where overflow checks are missing before calling realloc or calloc.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-03-28	0.25%	0.24%	-0.01%
2	2026-03-21	0.24%	0.25%	+0.01%
3	2026-02-27	—	0.24%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-03-28

0.25%

0.24%

-0.01%

2026-03-21

0.24%

0.25%

+0.01%

2026-02-27

—

0.24%

—

Base score	Version	Severity	Vector	Exploitability	Impact	Score source
7.5	3.1	HIGH	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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:N) Doesn’t really leak secrets in a meaningful way. Integrity (I:N) Data isn’t meaningfully altered or forged. Availability (A:H) Could take the service down hard or make it unusable for people who depend on it.	3.9	3.6	[email protected]
5.0	2.0	MEDIUM	`AV:N/AC:L/Au:N/C:N/I:N/A:P` Click to expand Access vector (AV:N) Can be exploited remotely over network reachability. Access complexity (AC:L) Exploitation conditions are straightforward and predictable. Authentication (AU:N) No authentication is required. Confidentiality impact (C:N) No confidentiality impact. Integrity impact (I:N) No integrity impact. Availability impact (A:P) Partial availability impact.	10.0	2.9	[email protected]

Base score

Version

Severity

Vector

Exploitability

Impact

Score source

7.5

3.1

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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:N): Doesn’t really leak secrets in a meaningful way.
Integrity (I:N): Data isn’t meaningfully altered or forged.
Availability (A:H): Could take the service down hard or make it unusable for people who depend on it.

3.9

3.6

[email protected]

5.0

2.0

MEDIUM

AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand

Access vector (AV:N): Can be exploited remotely over network reachability.
Access complexity (AC:L): Exploitation conditions are straightforward and predictable.
Authentication (AU:N): No authentication is required.
Confidentiality impact (C:N): No confidentiality impact.
Integrity impact (I:N): No integrity impact.
Availability impact (A:P): Partial availability impact.

10.0

2.9

[email protected]

OS Trackers for CVE-2020-29361

vendor	priority	summary	link
`alpine`	high	CVE-2020-29361: 1 source package rows (p11-kit); 10 state rows across 10 repos (3.10-main, 3.11-main, 3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 10, open 0.	https://security.alpinelinux.org/vuln/CVE-2020-29361
`debian`	not yet assigned	CVE-2020-29361 not yet assigned priority: Debian including 1 source packages (p11-kit), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5.	https://security-tracker.debian.org/tracker/CVE-2020-29361
`redhat`	medium	—	https://access.redhat.com/security/cve/CVE-2020-29361
`suse`	high	CVE-2020-29361 severity important: SUSE including 466 source package names (0.1.0:libp11-kit0-0.23.2-4.13.1, 0.1.75:libp11-kit0-0.23.2-4.13.1, …), 1159 product×package rows across 186 product lines (Container bci/openjdk, Container bci/openjdk-devel, … (186 product lines)): Fixed 895, Known Affected 163, Known Not Affected 101.	https://www.suse.com/security/cve/CVE-2020-29361/
`ubuntu`	medium	CVE-2020-29361 medium priority: Ubuntu including 1 source packages (p11-kit), 7 status rows across 7 suites (bionic, focal, groovy, hirsute, trusty, upstream, xenial): released 7.	https://ubuntu.com/security/CVE-2020-29361

Affected software / configurations for CVE-2020-29361

Vendor	Product	Version	Raw CPE
p11-kit_project	p11-kit	>= 0.21.1, <= 0.23.21	cpe:2.3:a:p11-kit_project:p11-kit::::::::
debian	debian_linux	9.0	cpe:2.3:o:debian:debian_linux:9.0:::::::*
debian	debian_linux	10.0	cpe:2.3:o:debian:debian_linux:10.0:::::::*

References for CVE-2020-29361

URL	Tags
https://github.com/p11-glue/p11-kit/releases	Release Notes Third Party Advisory
https://github.com/p11-glue/p11-kit/security/advisories/GHSA-q4r3-hm6m-mvc2	Third Party Advisory
https://lists.apache.org/thread.html/r58af02e294bd07f487e2c64ffc0a29b837db5600e33b6e698b9d696b%40%3Cissues.bookkeeper.apache.org%3E
https://lists.apache.org/thread.html/rf4c02775860db415b4955778a131c2795223f61cb8c6a450893651e4%40%3Cissues.bookkeeper.apache.org%3E
https://lists.debian.org/debian-lts-announce/2021/01/msg00002.html	Mailing List Third Party Advisory
https://www.debian.org/security/2021/dsa-4822	Third Party Advisory

URL

CVE-2020-29361

Exploit prediction scoring system (EPSS) score for CVE-2020-29361

Common vulnerability scoring system (CVSS) metrics for CVE-2020-29361

Weakness enumeration for CVE-2020-29361

OS Trackers for CVE-2020-29361

Affected software / configurations for CVE-2020-29361

References for CVE-2020-29361