Linux Security Update ( Bullseye )

[Fossy]

Debian Security Advisory DSA-5594-1 security@debian.org
https://www.debian.org/security/ Salvatore Bonaccorso
January 02, 2024 https://www.debian.org/security/faq
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Package : linux
CVE ID : CVE-2021-44879 CVE-2023-5178 CVE-2023-5197 CVE-2023-5717
CVE-2023-6121 CVE-2023-6531 CVE-2023-6817 CVE-2023-6931
CVE-2023-6932 CVE-2023-25775 CVE-2023-34324 CVE-2023-35827
CVE-2023-45863 CVE-2023-46813 CVE-2023-46862 CVE-2023-51780
CVE-2023-51781 CVE-2023-51782

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

CVE-2021-44879

Wenqing Liu reported a NULL pointer dereference in the f2fs
implementation. An attacker able to mount a specially crafted image
can take advantage of this flaw for denial of service.

CVE-2023-5178

Alon Zahavi reported a use-after-free flaw in the NVMe-oF/TCP
subsystem in the queue initialization setup, which may result in
denial of service or privilege escalation.

CVE-2023-5197

Kevin Rich discovered a use-after-free flaw in the netfilter
subsystem which may result in denial of service or privilege
escalation for a user with the CAP_NET_ADMIN capability in any user
or network namespace.

CVE-2023-5717

Budimir Markovic reported a heap out-of-bounds write vulnerability
in the Linux kernel's Performance Events system caused by improper
handling of event groups, which may result in denial of service or
privilege escalation. The default settings in Debian prevent
exploitation unless more permissive settings have been applied in
the kernel.perf_event_paranoid sysctl.

CVE-2023-6121

Alon Zahavi reported an out-of-bounds read vulnerability in the
NVMe-oF/TCP which may result in an information leak.

CVE-2023-6531

Jann Horn discovered a use-after-free flaw due to a race condition
when the unix garbage collector's deletion of a SKB races
with unix_stream_read_generic() on the socket that the SKB is
queued on.

CVE-2023-6817

Xingyuan Mo discovered that a use-after-free in Netfilter's
implementation of PIPAPO (PIle PAcket POlicies) may result in denial
of service or potential local privilege escalation for a user with
the CAP_NET_ADMIN capability in any user or network namespace.

CVE-2023-6931

Budimir Markovic reported a heap out-of-bounds write vulnerability
in the Linux kernel's Performance Events system which may result in
denial of service or privilege escalation. The default settings in
Debian prevent exploitation unless more permissive settings have
been applied in the kernel.perf_event_paranoid sysctl.

CVE-2023-6932

A use-after-free vulnerability in the IPv4 IGMP implementation may
result in denial of service or privilege escalation.

CVE-2023-25775

Ivan D Barrera, Christopher Bednarz, Mustafa Ismail and Shiraz
Saleem discovered that improper access control in the Intel Ethernet
Controller RDMA driver may result in privilege escalation.

CVE-2023-34324

Marek Marczykowski-Gorecki reported a possible deadlock in the Xen
guests event channel code which may allow a malicious guest
administrator to cause a denial of service.

CVE-2023-35827

Zheng Wang reported a use-after-free flaw in the Renesas Ethernet
AVB support driver.

CVE-2023-45863

A race condition in library routines for handling generic kernel
objects may result in an out-of-bounds write in the
fill_kobj_path() function.

CVE-2023-46813

Tom Dohrmann reported that a race condition in the Secure Encrypted
Virtualization (SEV) implementation when accessing MMIO registers
may allow a local attacker in a SEV guest VM to cause a denial of
service or potentially execute arbitrary code.

CVE-2023-46862

It was discovered that a race condition in the io_uring
subsystem may result in a NULL pointer dereference, causing a
denial of service.

CVE-2023-51780

It was discovered that a race condition in the ATM (Asynchronous
Transfer Mode) subsystem may lead to a use-after-free.

CVE-2023-51781

It was discovered that a race condition in the Appletalk subsystem
may lead to a use-after-free.

CVE-2023-51782

It was discovered that a race condition in the Amateur Radio X.25
PLP (Rose) support may lead to a use-after-free. This module is not
auto-loaded on Debian systems, so this issue only affects systems
where it is explicitly loaded.

For the oldstable distribution (bullseye), these problems have been fixed
in version 5.10.205-2.

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/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
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