CVE-2021-39517 describes a NULL pointer dereference vulnerability in libjpeg versions through 2020021, specifically within the BlockBitmapRequester::ReconstructUnsampled() function. This flaw allows an unauthenticated attacker to trigger a Denial of Service (DoS) by enticing a user to process a specially crafted JPEG file. With a CVSS score of 6.5 (Medium), the vulnerability is easily exploitable over a network with low attack complexity, leading to high availability impact. Currently, there is no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.
| 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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