CVE-2021-39520 describes a NULL pointer dereference vulnerability in libjpeg through version 2020021, specifically within the BlockBitmapRequester::PushReconstructedData() function. This flaw allows an unauthenticated, remote attacker to trigger a Denial of Service (DoS) condition with low attack complexity, earning a CVSS score of 6.5 (Medium). While the vulnerability is publicly disclosed, there is currently no evidence of active exploitation, nor are there known public exploit modules or significant community discussion surrounding it.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 2020021CPE matchmatch criteria | cpe:2.3:a:jpeg:libjpeg:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
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