• [SECURITY] [DSA 5191-1] linux security update

    From Moritz Muehlenhoff@21:1/5 to All on Tue Jul 26 22:10:01 2022
    Hash: SHA512

    - ------------------------------------------------------------------------- Debian Security Advisory DSA-5191-1 security@debian.org https://www.debian.org/security/ Moritz Muehlenhoff
    July 26, 2022 https://www.debian.org/security/faq
    - -------------------------------------------------------------------------

    Package : linux
    CVE ID : CVE-2021-33655 CVE-2022-2318 CVE-2022-26365 CVE-2022-33740
    CVE-2022-33741 CVE-2022-33742 CVE-2022-33743 CVE-2022-33744

    Several vulnerabilities have been discovered in the Linux kernel that may
    lead to privilege escalation, denial of service or information leaks:


    A user with access to a framebuffer console driver could cause a
    memory out-of-bounds write via the FBIOPUT_VSCREENINFO ioctl.


    A use-after-free in the Amateur Radio X.25 PLP (Rose) support may
    result in denial of service.

    CVE-2022-26365 / CVE-2022-33740 / CVE-2022-33741 / CVE-2022-33742

    Roger Pau Monne discovered that Xen block and network PV device
    frontends don't zero out memory regions before sharing them with the
    backend, which may result in information disclosure. Additionally it
    was discovered that the granularity of the grant table doesn't permit
    sharing less than a 4k page, which may also result in information


    Jan Beulich discovered that incorrect memory handling in the Xen
    network backend may lead to denial of service.


    Oleksandr Tyshchenko discovered that ARM Xen guests can cause a denial
    of service to the Dom0 via paravirtual devices.


    Arthur Mongodin discovered a heap buffer overflow in the Netfilter
    subsystem which may result in local privilege escalation.

    For the stable distribution (bullseye), these problems have been fixed in version 5.10.127-2.

    We recommend that you upgrade your linux packages.

    For the detailed security status of linux please refer to
    its security tracker page at:

    Further information about Debian Security Advisories, how to apply
    these updates to your system and frequently asked questions can be
    found at: https://www.debian.org/security/

    Mailing list: debian-security-announce@lists.debian.org

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