QID 355844

QID 355844: Amazon Linux Security Advisory for kernel : ALAS2-2023-2206

A buffer overrun vulnerability was found in the netback driver in xen due to an unusual split packet.
This flaw allows an unprivileged guest to cause a denial of service (dos) of the host by sending network packets to the backend, causing the backend to crash. (
( CVE-2023-34319) a use-after-free flaw was found in net/sched/cls_fw.c in classifiers (cls_fw, cls_u32, and cls_route) in the linux kernel.
This flaw allows a local attacker to perform a local privilege escalation due to incorrect handling of the existing filter, leading to a kernel information leak issue. (
( CVE-2023-4128)



Note: The preceding description block is extracted directly from the security advisory. Using automation, we have attempted to clean and format it as much as possible without introducing additional issues.

Successful exploitation of this vulnerability could lead to a securitybreach or could affect integrity, availability, and confidentiality.

  • CVSS V3 rated as High - 7.8 severity.
  • CVSS V2 rated as Medium - 5.4 severity.
    • Solution
    Please refer to Amazon advisory: ALAS2-2023-2206 for affected packages and patching details, or update with your package manager.
    Vendor References

    CVEs related to QID 355844

    CVE-2023-34319 | CVE-2023-4128 |
    Software Advisories
    Advisory ID Software Component Link
    ALAS2-2023-2206 amazon linux 2 URL Logo alas.aws.amazon.com/AL2/ALAS-2023-2206.html
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