SB2026100923 - Red Hat Enterprise Linux 8 update for kernel

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Main Vulnerability Database SB2026100923

SB2026100923 - Red Hat Enterprise Linux 8 update for kernel

Published: October 9, 2026

Security Bulletin ID SB2026100923
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 50% Low 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Out-of-bounds read (CVE-ID: CVE-2026-72129)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote user to cause a denial of service.

The vulnerability exists due to an out-of-bounds read in nvmet_rdma_use_inline_sg() and inline scatterlist handling in the NVMe target RDMA component when processing host-controlled inline data with a nonzero offset. A remote user can send crafted inline data offsets and lengths to cause a denial of service.

The issue can be triggered when inline_data_size is configured larger than PAGE_SIZE, and page-spanning in-bounds ranges may also cause the scatterlist to be under-counted.


2) Use-after-free (CVE-ID: CVE-2026-74705)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a local attacker to cause a denial of service.

The vulnerability exists due to use-after-free in __skb_udp_tunnel_segment() in net/ipv4/udp_offload.c when processing tunnel segmentation for skb data after pulling the tunnel header into the skb head. A local attacker can trigger skb head reallocation and subsequent use of a stale UDP header pointer to cause a denial of service.


Remediation

Install update from vendor's website.

References