RHEL 8 : kernel (RHSA-2026:77301)

high Nessus Plugin ID 363823

Synopsis

The remote Red Hat host is missing one or more security updates.

Description

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by multiple vulnerabilities as referenced in the RHSA-2026:77301 advisory.

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

* kernel: smc: Fix use-after-free in tcp_write_timer_handler() (CVE-2023-53781)

* kernel: ALSA: firewire-motu: fix buffer overflow in hwdep read for DSP events (CVE-2025-68347)

* kernel: xfrm: hold dev ref until after transport_finish NF_HOOK (CVE-2026-31663)

* kernel: Bluetooth: MGMT: validate LTK enc_size on load (CVE-2026-43020)

* kernel: Linux kernel: xfrm single-frag length not properly limited ()

* kernel: RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv (CVE-2026-46043)

* kernel: RDMA/rxe: Reject unknown opcodes before ICRC processing (CVE-2026-46133)

* kernel: sctp: purge outqueue on stale COOKIE-ECHO handling (CVE-2026-52924)

* kernel: xfrm: policy: fix use-after-free on inexact bin in xfrm_policy_bysel_ctx() (CVE-2026-53239)

* kernel: ip6: vti: Use ip6_tnl.net in vti6_siocdevprivate() (CVE-2026-63921)

* kernel: xfrm: input: hold netns during deferred transport reinjection (CVE-2026-63919)

* kernel: ip6: vti: Use ip6_tnl.net in vti6_changelink() (CVE-2026-63917)

* kernel: AMD-SN-7061: Safe RET Interrupt Vulnerability (CVE-2026-68480)

* kernel: RDMA/rxe: Fix a use-after-free problem in rxe_mmap (CVE-2026-64582)

* kernel: net: qrtr: restrict socket creation to the initial network namespace (CVE-2026-68294)

* kernel: xfrm: fix stale skb->prev after async crypto steals a GSO segment (CVE-2026-68426)

* kernel: netfilter: flowtable: publish GC-visible tuple last (CVE-2026-74746)

* kernel: RDMA/rxe: Fix responder UAF on IB_QP_MAX_DEST_RD_ATOMIC modify_qp (CVE-2026-80864)

* kernel: RDMA/rxe: Fix OOB in free_rd_atomic_resources() (CVE-2026-80863)

Bug Fix(es) and Enhancement(s):

* scsi: mpt3sas: avoid freeing unallocated PCIe SGL buffers (JIRA:RHEL-256999)

* xfs corruption from [xfs_trans_cancel] during inode allocation (JIRA:RHEL-257187)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

Solution

Update the affected packages.

Plugin Details

Severity: High

ID: 363823

File Name: redhat-RHSA-2026-77301.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Red Hat Local Security Checks

Published: 10/7/2026

Updated: 10/7/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.6

Percentile: 98.3

Vendor

Vendor Severity: Important

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:C/A:C

CVSS Score Source: CVE-2026-43020

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:redhat:rhel_e4s:8.8, cpe:/o:redhat:rhel_tus:8.8, p-cpe:/a:redhat:enterprise_linux:bpftool, p-cpe:/a:redhat:enterprise_linux:kernel-core, p-cpe:/a:redhat:enterprise_linux:kernel-debug-core, p-cpe:/a:redhat:enterprise_linux:kernel-debug-devel, p-cpe:/a:redhat:enterprise_linux:kernel-debug-modules-extra, p-cpe:/a:redhat:enterprise_linux:kernel-debug-modules, p-cpe:/a:redhat:enterprise_linux:kernel-debug, p-cpe:/a:redhat:enterprise_linux:kernel-devel, p-cpe:/a:redhat:enterprise_linux:kernel-modules-extra, p-cpe:/a:redhat:enterprise_linux:kernel-modules, p-cpe:/a:redhat:enterprise_linux:kernel-tools-libs, p-cpe:/a:redhat:enterprise_linux:kernel-tools, p-cpe:/a:redhat:enterprise_linux:kernel, p-cpe:/a:redhat:enterprise_linux:perf, p-cpe:/a:redhat:enterprise_linux:python3-perf

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list, Host/cpu

Exploit Ease: No known exploits are available

Patch Publication Date: 10/7/2026

Vulnerability Publication Date: 12/9/2025

Reference Information

CVE: CVE-2023-53781, CVE-2025-68347, CVE-2026-31663, CVE-2026-43020, CVE-2026-46043, CVE-2026-46133, CVE-2026-52924, CVE-2026-53239, CVE-2026-63917, CVE-2026-63919, CVE-2026-63921, CVE-2026-64582, CVE-2026-68294, CVE-2026-68426, CVE-2026-68480, CVE-2026-74746, CVE-2026-80863, CVE-2026-80864

CWE: 120, 191, 201, 364, 653, 787, 825, 826, 911

RHSA: 2026:77301

Detections

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