Amazon Linux 2 : kernel (ALASKERNEL-5.10-2026-133)

high Nessus Plugin ID 365191

Language:

Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

The version of kernel installed on the remote host is prior to 5.10.269-270.1108. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2KERNEL-5.10-2026-133 advisory.

An issue in the Linux kernel's virtio-net/TAP networking path could allow an actor with privileged access inside a guest virtual machine to send specially crafted network packets that corrupt host kernel memory on KVM-based hypervisors running unpatched Linux kernel versions 4.4 through 6.18. This could result in disclosure of host memory or a denial of service.

In the Linux kernel, the following vulnerability has been resolved:

netfilter: nf_tables: add hook transactions for device deletions (CVE-2026-63858)

In the Linux kernel, the following vulnerability has been resolved:

bpf, skmsg: fix verdict sk_data_ready racing with ktls rx

sk_psock_strp_data_ready() already checks tls_sw_has_ctx_rx() anddefers to psock->saved_data_ready when a TLS RX context is present,avoiding a conflict with the TLS strparser's ownership of the receivequeue (commit e91de6afa81c, bpf: Fix running sk_skb program typeswith ktls).

sk_psock_verdict_data_ready() has no equivalent guard. When a socketis inserted into a sockmap (BPF_SK_SKB_VERDICT) before TLS RX isconfigured, tls_sw_strparser_arm() saves sk_psock_verdict_data_readyas rx_ctx->saved_data_ready. On data arrival:

tls_data_ready -> tls_strp_data_ready -> tls_rx_msg_ready-> saved_data_ready() = sk_psock_verdict_data_ready()-> tcp_read_skb() drains sk_receive_queue via __skb_unlink()without calling tcp_eat_skb(), so copied_seq is not advanced.

tls_strp_msg_load() then finds tcp_inq() >= full_len (stale), callstcp_recv_skb() on the now-empty queue, hits WARN_ON_ONCE(!first), andreturns with rx_ctx->strp.anchor.frag_list pointing at a psock- owned(potentially freed) skb. tls_decrypt_sg() subsequently walks thatfrag_list: use-after-free.

Apply the same fix as sk_psock_strp_data_ready(): if a TLS RX contextis present, call psock->saved_data_ready (sock_def_readable) to wakerecv() waiters and return immediately, leaving the receive queueuntouched. TLS retains sole ownership of the queue and decrypts therecord normally through tls_sw_recvmsg(). (CVE-2026-64025)

In the Linux kernel, the following vulnerability has been resolved:

USB: iowarrior: fix use-after-free on disconnect race (CVE-2026-64341)

In the Linux kernel, the following vulnerability has been resolved:

ipvs: reload ip header after head reallocation (CVE-2026-68476)

In the Linux kernel, the following vulnerability has been resolved:

ipv4: igmp: Fix potential UAF in igmp_gq_start_timer() (CVE-2026-72323)

In the Linux kernel, the following vulnerability has been resolved:

bridge: stp: Fix a potential use-after-free when deleting a bridge (CVE-2026-72389)

In the Linux kernel, the following vulnerability has been resolved:

ipvlan: inherit needed_headroom and needed_tailroom from phy_dev (CVE-2026-74744)

In the Linux kernel, the following vulnerability has been resolved:

HID: magicmouse: do not keep a stale msc->input if no input is claimed (CVE-2026-80782)

In the Linux kernel, the following vulnerability has been resolved:

ext4: don't enable DAX on new encrypted files (CVE-2026-80806)

In the Linux kernel, the following vulnerability has been resolved:

nilfs2: reject invalid block index in GC ioctl (CVE-2026-80807)

In the Linux kernel, the following vulnerability has been resolved:

usb: usbfs: fix use-after-free of usb_device in usbdev_release() (CVE-2026-80824)

In the Linux kernel, the following vulnerability has been resolved:

USB: serial: option: fix slab OOB read in interrupt URB callback (CVE-2026-80827)

In the Linux kernel, the following vulnerability has been resolved:

usb: core: Add lock to usb_wakeup_notification() (CVE-2026-80830)

In the Linux kernel, the following vulnerability has been resolved:

ipv6: seg6: clear IPv4 control block on IPIP decapsulation (CVE-2026-80840)

In the Linux kernel, the following vulnerability has been resolved:

xfrm: fix xfrm_state_construct() auth-trunc leak (CVE-2026-80843)

In the Linux kernel, the following vulnerability has been resolved:

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

In the Linux kernel, the following vulnerability has been resolved: ipv4: validate checksum_start before completing checksum If a packet with bad checksum metadata gets into the ipv4 stack, skb_checksum_help can corrupt the network header and cause a bunch of mischief. This was discovered and reported by Paulos, and has been reporoduced by others independently since. We really shouldn't allow such packets in, but as a defence in depth measure, let's also check before we complete the checksum. A more complete validation at input is forthcoming, but needs more work. (CVE-2026-99999)

Tenable has extracted the preceding description block directly from the tested product 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

Run 'yum update kernel' or or 'yum update --advisory ALAS2KERNEL-5.10-2026-133' to update your system.

Plugin Details

Severity: High

ID: 365191

File Name: al2_ALASKERNEL-5_10-2026-133.nasl

Version: 1.4

Type: Local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 10/12/2026

Updated: 10/19/2026

Supported Sensors: Frictionless Assessment AWS, Frictionless Assessment Agent, Nessus Agent, Agentless Assessment, Continuous Assessment, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: High

Score: 8

Percentile: 99.7

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.3

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

CVSS Score Source: CVE-2026-64341

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7

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:P/RL:O/RC:C

Vulnerability Information

CPE: cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:bpftool-debuginfo, p-cpe:/a:amazon:linux:bpftool, p-cpe:/a:amazon:linux:kernel-debuginfo-common-aarch64, p-cpe:/a:amazon:linux:kernel-debuginfo-common-x86_64, p-cpe:/a:amazon:linux:kernel-debuginfo, p-cpe:/a:amazon:linux:kernel-devel, p-cpe:/a:amazon:linux:kernel-headers, p-cpe:/a:amazon:linux:kernel-livepatch-5.10.269-270.1108, p-cpe:/a:amazon:linux:kernel-tools-debuginfo, p-cpe:/a:amazon:linux:kernel-tools-devel, p-cpe:/a:amazon:linux:kernel-tools, p-cpe:/a:amazon:linux:kernel, p-cpe:/a:amazon:linux:perf-debuginfo, p-cpe:/a:amazon:linux:perf, p-cpe:/a:amazon:linux:python-perf-debuginfo, p-cpe:/a:amazon:linux:python-perf

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 10/12/2026

Vulnerability Publication Date: 6/4/2026

Reference Information

CVE: CVE-2026-63858, CVE-2026-64025, CVE-2026-64341, CVE-2026-68476, CVE-2026-72323, CVE-2026-72389, CVE-2026-74744, CVE-2026-80782, CVE-2026-80806, CVE-2026-80807, CVE-2026-80824, CVE-2026-80827, CVE-2026-80830, CVE-2026-80840, CVE-2026-80843, CVE-2026-80863, CVE-2026-99999

Detections

Analytics