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LSN-0097-1: Kernel Live Patch Security Notice

5 September 2023

Several security issues were fixed in the kernel.

Releases

Software Description

  • aws - Linux kernel for Amazon Web Services (AWS) systems - (>= 5.4.0-1009, >= 5.4.0-1061, >= 5.15.0-1000, >= 4.4.0-1098, >= 4.4.0-1129)
  • aws-5.15 - Linux kernel for Amazon Web Services (AWS) systems - (>= 5.15.0-1000)
  • aws-5.4 - Linux kernel for Amazon Web Services (AWS) systems - (>= 5.4.0-1069)
  • aws-6.2 - Linux kernel for Amazon Web Services (AWS) systems - (>= 6.2.0-1000)
  • aws-hwe - Linux kernel for Amazon Web Services (AWS-HWE) systems - (>= 4.15.0-1126)
  • azure - Linux kernel for Microsoft Azure Cloud systems - (>= 5.4.0-1010, >= 5.15.0-1000)
  • azure-5.4 - Linux kernel for Microsoft Azure cloud systems - (>= 5.4.0-1069)
  • gcp - Linux kernel for Google Cloud Platform (GCP) systems - (>= 5.4.0-1009, >= 5.15.0-1000)
  • gcp-5.15 - Linux kernel for Google Cloud Platform (GCP) systems - (>= 5.15.0-1000)
  • gcp-5.4 - Linux kernel for Google Cloud Platform (GCP) systems - (>= 5.4.0-1069)
  • generic-4.15 - Linux hardware enablement (HWE) kernel - (>= 4.15.0-143, >= 4.15.0-143, >= 4.15.0-69)
  • generic-4.4 - Linux kernel - (>= 4.4.0-168, >= 4.4.0-211, >= 4.4.0-168)
  • generic-5.15 - Linux hardware enablement (HWE) kernel - (>= 5.15.0-0)
  • generic-5.4 - Linux kernel - (>= 5.4.0-26, >= 5.4.0-26)
  • gke - Linux kernel for Google Container Engine (GKE) systems - (>= 5.4.0-1033, >= 5.15.0-1000)
  • gke-5.15 - Linux kernel for Google Container Engine (GKE) systems - (>= 5.15.0-1000)
  • gke-5.4 - Linux kernel for Google Container Engine (GKE) systems - (>= 5.4.0-1009)
  • gkeop - Linux kernel for Google Container Engine (GKE) systems - (>= 5.4.0-1009)
  • gkeop-5.4 - Linux kernel for Google Container Engine (GKE) systems - (>= 5.4.0-1007)
  • ibm - Linux kernel for IBM cloud systems - (>= 5.4.0-1009, >= 5.15.0-1000)
  • ibm-5.4 - Linux kernel for IBM cloud systems - (>= 5.4.0-1009)
  • linux - Linux kernel - (>= 5.15.0-71, >= 5.15.0-24)
  • lowlatency-4.15 - Linux hardware enablement (HWE) kernel - (>= 4.15.0-143, >= 4.15.0-143, >= 4.15.0-69)
  • lowlatency-4.4 - Linux kernel - (>= 4.4.0-168, >= 4.4.0-211, >= 4.4.0-168)
  • lowlatency-5.15 - Linux hardware enablement (HWE) kernel - (>= 5.15.0-0)
  • lowlatency-5.4 - Linux kernel - (>= 5.4.0-26, >= 5.4.0-26)

Details

It was discovered that the IP-VLAN network driver for the Linux kernel did
not properly initialize memory in some situations, leading to an out-of-
bounds write vulnerability. An attacker could use this to cause a denial of
service (system crash) or possibly execute arbitrary code.(CVE-2023-3090)

Querijn Voet discovered that a race condition existed in the io_uring
subsystem in the Linux kernel, leading to a use-after-free vulnerability. A
local attacker could use this to cause a denial of service (system crash)
or possibly execute arbitrary code.(CVE-2023-3389)

It was discovered that the netfilter subsystem in the Linux kernel did not
properly handle some error conditions, leading to a use-after-free
vulnerability. A local attacker could use this to cause a denial of service
(system crash) or possibly execute arbitrary code.(CVE-2023-3390)

Mingi Cho discovered that the netfilter subsystem in the Linux kernel did
not properly validate the status of a nft chain while performing a lookup
by id, leading to a use-after-free vulnerability. An attacker could use
this to cause a denial of service (system crash) or possibly execute
arbitrary code.(CVE-2023-31248)

Shir Tamari and Sagi Tzadik discovered that the OverlayFS implementation in
the Ubuntu Linux kernel did not properly perform permission checks in
certain situations. A local attacker could possibly use this to gain
elevated privileges.(CVE-2023-32629)

Tanguy Dubroca discovered that the netfilter subsystem in the Linux kernel
did not properly handle certain pointer data type, leading to an out-of-
bounds write vulnerability. A privileged attacker could use this to cause a
denial of service (system crash) or possibly execute arbitrary code.(CVE-2023-35001)

Hangyu Hua discovered that the Flower classifier implementation in the
Linux kernel contained an out-of-bounds write vulnerability. An attacker
could use this to cause a denial of service (system crash) or possibly
execute arbitrary code.(CVE-2023-35788)

Checking update status

The problem can be corrected in these Livepatch versions:

Kernel type 22.04 20.04 18.04 16.04 14.04
aws 97.1 97.1 97.2
aws-5.15 97.1
aws-5.4 97.1
aws-6.2 97.2
aws-hwe 97.2
azure 97.1 97.1
azure-5.4 97.1
gcp 97.1 97.1
gcp-5.15 97.1
gcp-5.4 97.1
generic-4.15 97.2
generic-4.4 97.2 97.2
generic-5.15 97.1
generic-5.4 97.1 97.1
gke 97.1 97.1
gke-5.15 97.1
gke-5.4 97.1
gkeop 97.1
gkeop-5.4 97.1
ibm 97.1 97.1
ibm-5.4 97.1
linux 97.1
lowlatency-4.15 97.2
lowlatency-4.4 97.2 97.2
lowlatency-5.15 97.1
lowlatency-5.4 97.1 97.1

To check your kernel type and Livepatch version, enter this command:

canonical-livepatch status