CVE-2021-44538 is a critical buffer overflow vulnerability in the olm_session_describe function of Matrix libolm before version 3.2.7, affecting products like Element Web and SchildiChat Web. Attackers can exploit this by sending crafted messages to manipulate a receiver's session, leading to a buffer overflow with partially controllable content. With a CVSS score of 9.8, this vulnerability is highly severe, allowing for complete compromise of confidentiality, integrity, and availability without user interaction. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 1.9.7CPE matchmatch criteria | cpe:2.3:a:matrix:element:*:*:*:*:desktop:*:*:* | ||
< 1.9.7CPE matchmatch criteria | cpe:2.3:a:matrix:element:*:*:*:*:web:*:*:* | ||
>= 2.4.2, < 15.2.1CPE matchmatch criteria | cpe:2.3:a:matrix:javascript_sdk:*:*:*:*:*:*:*:* | ||
>= 3.1.4, < 3.2.8CPE matchmatch criteria | cpe:2.3:a:matrix:olm:*:*:*:*:*:*:*:* | ||
< 1.9.7-sc1CPE matchmatch criteria | cpe:2.3:a:schildi:schildichat:*:*:*:*:desktop:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.