CVE-2021-38575

Description

NetworkPkg/IScsiDxe has remotely exploitable buffer overflows.

CVSS Metrics

• v3.1•HIGH•Score: 8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
• v2.0•MEDIUM•Score: 6.8AV:N/AC:M/Au:N/C:P/I:P/A:P

EPSS Trends

Current EPSS score: 0.53%• Percentile: 68%

Techniques & Countermeasures

• CWE-124•Buffer Underwrite ('Buffer Underflow')

  The product writes to a buffer using an index or pointer that references a memory location prior to the beginning of the buffer.

• CWE-119•Improper Restriction of Operations within the Bounds of a Memory Buffer

  The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Affected Systems

• insyde•kernel

  5.0 | 5.1 | 5.2 | 5.3 | 5.4 | 5.5

• tianocore•edk ii

  ≥ unspecified, ≤ edk2-stable202105

• tianocore•edk2

  ≤ 202105

References (3)

• https://bugzilla.tianocore.org/show_bug.cgi?id=3356
• https://www.insyde.com/security-pledge/SA-2023025
• https://lists.debian.org/debian-lts-announce/2025/06/msg00007.html