Detections
Analytics
MiracleLinux 8 : kernel-4.18.0-553.184.2.el8_10 (AXSA:2026-2309:124)
high Nessus Plugin ID 379550
Synopsis
The remote MiracleLinux host is missing a security update.Description
The remote MiracleLinux 8 host has packages installed that are affected by a vulnerability as referenced in the AXSA:2026-2309:124 advisory.The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security fix(es):
- net: lock the socket in sock_gettstamp() (CVE-2026-98276) CVE(s):
CVE-2026-98276 In the Linux kernel, the following vulnerability has been resolved: net: lock the socket in sock_gettstamp() sk->sk_flags must only be changed while holding the socket lock, because sock_set_flag() and sock_reset_flag() use non atomic operations (__set_bit() and __clear_bit()). sock_gettstamp() is one of the last places where a bit of sk->sk_flags is changed from a syscall without owning the socket lock, through sock_enable_timestamp(sk, SOCK_TIMESTAMP).
sk_set_memalloc() and sk_clear_memalloc() also change sk->sk_flags without the socket lock, but their callers (nbd, iscsi_tcp, nvme-tcp, sunrpc, wireguard) need a careful audit, this will be addressed in a separate patch. Jungwoo Lee and Wongi Lee reported an UDP socket use-after-free caused by this bug: a SIOCGSTAMPNS_NEW ioctl racing with bind() can cancel the SOCK_RCU_FREE bit that udp_lib_get_port() just set, because both threads perform a read-modify-write on the same word. CPU 0 (bind) CPU 1 (SIOCGSTAMPNS_NEW)
-------------------------------- ---------------------------- read sk_flags = F read sk_flags = F compute F | BIT(SOCK_RCU_FREE) compute F | BIT(SOCK_TIMESTAMP) store F | BIT(SOCK_RCU_FREE) sk_add_node_rcu(sk, ...) store F | BIT(SOCK_TIMESTAMP) After the lost update, SOCK_RCU_FREE is clear while the socket is visible to lockless UDP receive lookups. sk_destruct() then frees the socket immediately instead of waiting for a RCU grace period, while the receive path still holds a reference-less pointer to it: BUG: KASAN: slab-use-after-free in ipv4_pktinfo_prepare+0x30/0x410 Read of size 8 at addr ffff888008806610 by task exploit/207 CPU: 0 UID: 1000 PID: 207 Comm: exploit Not tainted 6.12.95+ #1 ipv4_pktinfo_prepare+0x30/0x410 udp_queue_rcv_one_skb+0x51c/0x1180 udp_unicast_rcv_skb+0x109/0x350 ip_protocol_deliver_rcu+0x14b/0x310 ip_local_deliver_finish+0x29d/0x390 ip_local_deliver+0x24d/0x2a0 Only grab the socket lock when SOCK_TIMESTAMP has to be set, to keep the common case lockless.
Tenable has extracted the preceding description block directly from the MiracleLinux security advisory.
Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.
Solution
Update the affected packages.See Also
Plugin Details
Severity: High
ID: 379550
File Name: miracle_linux_AXSA-2026-2309.nasl
Version: 1.1
Type: Local
Published: 11/12/2026
Updated: 11/12/2026
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Medium
Score: 6.9
Percentile: 96.32
Vendor
Vendor Severity: High
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-2026-98276
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:miracle:linux:8, p-cpe:/a:miracle:linux:bpftool, p-cpe:/a:miracle:linux:kernel-abi-stablelists, p-cpe:/a:miracle:linux:kernel-core, p-cpe:/a:miracle:linux:kernel-cross-headers, p-cpe:/a:miracle:linux:kernel-debug-core, p-cpe:/a:miracle:linux:kernel-debug-devel, p-cpe:/a:miracle:linux:kernel-debug-modules-extra, p-cpe:/a:miracle:linux:kernel-debug-modules, p-cpe:/a:miracle:linux:kernel-debug, p-cpe:/a:miracle:linux:kernel-devel, p-cpe:/a:miracle:linux:kernel-headers, p-cpe:/a:miracle:linux:kernel-modules-extra, p-cpe:/a:miracle:linux:kernel-modules, p-cpe:/a:miracle:linux:kernel-tools-libs-devel, p-cpe:/a:miracle:linux:kernel-tools-libs, p-cpe:/a:miracle:linux:kernel-tools, p-cpe:/a:miracle:linux:kernel, p-cpe:/a:miracle:linux:perf, p-cpe:/a:miracle:linux:python3-perf
Required KB Items: Host/local_checks_enabled, Host/cpu, Host/MiracleLinux/release, Host/MiracleLinux/rpm-list
Exploit Ease: No known exploits are available
Patch Publication Date: 11/12/2026
Vulnerability Publication Date: 10/6/2026
Reference Information
CVE: CVE-2026-98276