CVE-2022-26498 [High] | Denial of Service in Asterisk

CVE-2022-26498 is rated High Risk (68.7/100): CVSS High severity, with high exploitation likelihood (EPSS 15.43%, 96th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +14.41% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

#	Date	Old EPSS score	New EPSS score	Delta (New - Old)
1	2026-06-15	1.01%	15.43%	+14.41%
2	2026-06-01	0.75%	1.01%	+0.26%
3	2026-05-30	—	0.75%	—

Date

Old EPSS score

New EPSS score

Delta (New - Old)

2026-06-15

1.01%

15.43%

+14.41%

2026-06-01

0.75%

1.01%

+0.26%

2026-05-30

—

0.75%

—

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-2022-26498

vendor	priority	summary	link
`alpine`	high	CVE-2022-26498: 1 source package rows (asterisk); 32 state rows across 8 repos (3.12-main, 3.17-main, 3.18-main, 3.19-main, 3.20-main, 3.21-main, 3.22-main, edge-main); fixed 7, open 25.	https://security.alpinelinux.org/vuln/CVE-2022-26498
`debian`	not yet assigned	CVE-2022-26498 not yet assigned priority: Debian including 1 source packages (asterisk), 2 status rows across 2 suites (bullseye, sid): resolved 2.	https://security-tracker.debian.org/tracker/CVE-2022-26498
`gentoo`	high	CVE-2022-26498: 1 GLSA(s) (202412-03), 1 atom(s) (net-misc/asterisk); latest impact high.	https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2022-26498
`ubuntu`	medium	CVE-2022-26498 medium priority: Ubuntu including 1 source packages (asterisk), 14 status rows across 14 suites (bionic, focal, impish, jammy, kinetic, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): ignored 7, needs-triage 6, released 1.	https://ubuntu.com/security/CVE-2022-26498

Affected software / configurations for CVE-2022-26498

Vendor	Product	Version	Raw CPE
digium	asterisk	>= 16.15.0, <= 16.25.1	cpe:2.3:a:digium:asterisk::::::::
digium	asterisk	>= 18.0, < 18.11.2	cpe:2.3:a:digium:asterisk::::::::
digium	asterisk	>= 19.0.0, <= 19.3.1	cpe:2.3:a:digium:asterisk::::::::
debian	debian_linux	10.0	cpe:2.3:o:debian:debian_linux:10.0:::::::*
debian	debian_linux	11.0	cpe:2.3:o:debian:debian_linux:11.0:::::::*

References for CVE-2022-26498

URL	Tags
http://packetstormsecurity.com/files/166744/Asterisk-Project-Security-Advisory-AST-2022-001.html	Patch Third Party Advisory VDB Entry
http://packetstormsecurity.com/files/172139/Shannon-Baseband-chatroom-SDP-Attribute-Memory-Corruption.html
https://downloads.asterisk.org/pub/security/	Vendor Advisory
https://downloads.asterisk.org/pub/security/AST-2022-001.html	Patch Vendor Advisory
https://lists.debian.org/debian-lts-announce/2022/11/msg00021.html	Mailing List Third Party Advisory
https://www.debian.org/security/2022/dsa-5285	Third Party Advisory

URL

CVE-2022-26498

Exploit prediction scoring system (EPSS) score for CVE-2022-26498

Common vulnerability scoring system (CVSS) metrics for CVE-2022-26498

Weakness enumeration for CVE-2022-26498

OS Trackers for CVE-2022-26498

Affected software / configurations for CVE-2022-26498

References for CVE-2022-26498