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Debian Security Advisory DSA-5448-1                   security@debian.org
https://www.debian.org/security/                     Salvatore Bonaccorso
July 05, 2023                         https://www.debian.org/security/faq
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Package        : linux
CVE ID         : CVE-2023-2124 CVE-2023-2156 CVE-2023-2269 CVE-2023-3090
                 CVE-2023-3212 CVE-2023-3268 CVE-2023-3269 CVE-2023-3390
                 CVE-2023-31084 CVE-2023-32250 CVE-2023-32254 CVE-2023-35788

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

CVE-2023-2124

    Kyle Zeng, Akshay Ajayan and Fish Wang discovered that missing
    metadata validation may result in denial of service or potential
    privilege escalation if a corrupted XFS disk image is mounted.

CVE-2023-2156

    It was discovered that the IPv6 RPL protocol implementation in the
    Linux kernel did not properly handled user-supplied data, resulting
    in a triggerable assertion. An unauthenticated remote attacker can
    take advantage of this flaw for denial of service.

CVE-2023-2269

    Zheng Zhang reported that improper handling of locking in the device
    mapper implementation may result in denial of service.

CVE-2023-3090

    It was discovered that missing initialization in ipvlan networking
    may lead to an out-of-bounds write vulnerability, resulting in
    denial of service or potentially the execution of arbitrary code.

CVE-2023-3212

    Yang Lan that missing validation in the GFS2 filesystem could result
    in denial of service via a NULL pointer dereference when mounting a
    malformed GFS2 filesystem.

CVE-2023-3268

    It was discovered that an out-of-bounds memory access in relayfs
    could result in denial of service or an information leak.

CVE-2023-3269

    Ruihan Li discovered that incorrect lock handling for accessing and
    updating virtual memory areas (VMAs) may result in privilege
    escalation.

CVE-2023-3390

    A use-after-free flaw in the netfilter subsystem caused by incorrect
    error path handling may result in denial of service or privilege
    escalation.

CVE-2023-31084

    It was discovered that the DVB Core driver does not properly handle
    locking of certain events, allowing a local user to cause a denial
    of service.

CVE-2023-32250 / CVE-2023-32254

    Quentin Minster discovered two race conditions in KSMBD, a kernel
    server which implements the SMB3 protocol, which could result in
    denial of service or potentially the execution of arbitrary code.

CVE-2023-35788

    Hangyu Hua discovered an out-of-bounds write vulnerability in the
    Flower classifier which may result in denial of service or the
    execution of arbitrary code.

For the stable distribution (bookworm), these problems have been fixed in
version 6.1.37-1.

We recommend that you upgrade your linux packages.

For the detailed security status of linux please refer to its security
tracker page at:
https://security-tracker.debian.org/tracker/source-package/linux

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