Important: kernel

Issue Overview:

2023-06-29: CVE-2023-33203 was added to this advisory.

2023-06-07: CVE-2023-1838 was added to this advisory.

The Linux kernel before 6.2.9 has a race condition and resultant use-after-free in drivers/net/ethernet/qualcomm/emac/emac.c if a physically proximate attacker unplugs an emac based device. (CVE-2023-33203)

A use-after-free flaw was found in vhost_net_set_backend in drivers/vhost/net.c in virtio network subcomponent in the Linux kernel due to a double fget. This flaw could allow a local attacker to crash the system, and could even lead to a kernel information leak problem. (CVE-2023-1838)

An out-of-bounds memory access flaw was found in the Linux kernel’s XFS file system in how a user restores an XFS image after failure (with a dirty log journal). This flaw allows a local user to crash or potentially escalate their privileges on the system. (CVE-2023-2124)

cbq_classify in net/sched/sch_cbq.c in the Linux kernel through 6.1.4 allows attackers to cause a denial of service (slab-out-of-bounds read) because of type confusion (non-negative numbers can sometimes indicate a TC_ACT_SHOT condition rather than valid classification results). (CVE-2023-23454)

Affected Packages:

kernel

Issue Correction:
Run yum update kernel to update your system.

New Packages:

i686:  
    kernel-debuginfo-common-i686-4.14.313-162.533.amzn1.i686  
    kernel-tools-debuginfo-4.14.313-162.533.amzn1.i686  
    kernel-devel-4.14.313-162.533.amzn1.i686  
    perf-debuginfo-4.14.313-162.533.amzn1.i686  
    kernel-headers-4.14.313-162.533.amzn1.i686  
    perf-4.14.313-162.533.amzn1.i686  
    kernel-4.14.313-162.533.amzn1.i686  
    kernel-tools-4.14.313-162.533.amzn1.i686  
    kernel-debuginfo-4.14.313-162.533.amzn1.i686  
    kernel-tools-devel-4.14.313-162.533.amzn1.i686  
  
src:  
    kernel-4.14.313-162.533.amzn1.src  
  
x86_64:  
    kernel-tools-debuginfo-4.14.313-162.533.amzn1.x86_64  
    kernel-4.14.313-162.533.amzn1.x86_64  
    kernel-tools-devel-4.14.313-162.533.amzn1.x86_64  
    kernel-debuginfo-common-x86_64-4.14.313-162.533.amzn1.x86_64  
    perf-4.14.313-162.533.amzn1.x86_64  
    kernel-headers-4.14.313-162.533.amzn1.x86_64  
    kernel-debuginfo-4.14.313-162.533.amzn1.x86_64  
    kernel-tools-4.14.313-162.533.amzn1.x86_64  
    kernel-devel-4.14.313-162.533.amzn1.x86_64  
    perf-debuginfo-4.14.313-162.533.amzn1.x86_64  

Additional References

Red Hat: CVE-2023-1838, CVE-2023-2124, CVE-2023-23454, CVE-2023-33203

Mitre: CVE-2023-1838, CVE-2023-2124, CVE-2023-23454, CVE-2023-33203