The vulnerability of the setup_callback_client() function in the fs/nfsd/nfs4callback.c module, which supports the Network File System in Linux kernels, allows a attacker to compromise the confidentiality, integrity, and accessibility of the protected information.

🗓️ 02 Mar 2026 00:00:00Reported by FSTEC of Russia — Information Security Threat DatabaseType

bdu_fstec

bdu_fstec🔗 bdu.fstec.ru👁 4 Views

Weakness in setup_callback_client in fs/nfsd/nfs4callback.c reusing freed memory risks data confidentiality, integrity, and availability.

Reporter	Title	Published	Views	Family All 83
Tenable Nessus	Amazon Linux 2 : kernel, --advisory ALAS2-2023-1932 (ALAS-2023-1932)	8 Feb 202300:00	–	nessus
Tenable Nessus	Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.10-2023-026 (ALASKERNEL-5.10-2023-026)	8 Feb 202300:00	–	nessus
Tenable Nessus	Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.15-2023-012 (ALASKERNEL-5.15-2023-012)	24 Jan 202300:00	–	nessus
Tenable Nessus	Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.4-2023-042 (ALASKERNEL-5.4-2023-042)	23 Feb 202300:00	–	nessus
Tenable Nessus	EulerOS 2.0 SP13 : kernel (EulerOS-SA-2026-1212)	2 Feb 202600:00	–	nessus
Tenable Nessus	EulerOS 2.0 SP13 : kernel (EulerOS-SA-2026-1224)	2 Feb 202600:00	–	nessus
Tenable Nessus	EulerOS Virtualization 2.13.0 : kernel (EulerOS-SA-2026-1629)	18 Mar 202600:00	–	nessus
Tenable Nessus	EulerOS Virtualization 2.13.1 : kernel (EulerOS-SA-2026-1637)	18 Mar 202600:00	–	nessus
Tenable Nessus	Photon OS 4.0: Linux PHSA-2021-4.0-0065	22 Jul 202100:00	–	nessus
Tenable Nessus	SUSE SLES12 Security Update : kernel (SUSE-SU-2025:03614-1)	21 Oct 202500:00	–	nessus

Vulners

Node

OR

red_hat red_hat_enterprise_linuxMatch8

red_hat red_hat_enterprise_linuxMatch9

Source	Link
cve	www.cve.org/CVERecord
git	www.git.kernel.org/stable/c/707bcca9616002d204091ca7c4d1d91151104332
git	www.git.kernel.org/stable/c/15fc60aa5bdcf6d5f93000d3d00579fc67632ee0
git	www.git.kernel.org/stable/c/9b4ae8c42d2ff09ed7c5832ccce5684c55e5ed23
git	www.git.kernel.org/stable/c/fddac3b4578d302ac9e51e7f03a9aae6254ae2a3
git	www.git.kernel.org/stable/c/c1207219a4bfa50121c9345d5d165470d0a82531
git	www.git.kernel.org/stable/c/a472f069ced8601979f53c13c0cf20236074ed46
git	www.git.kernel.org/stable/c/e2f9f03e4537f3fcc8fd2bdd3248530c3477a371
git	www.git.kernel.org/stable/c/d843ebd860c58a38e45527e8ec6516059f4c97f3
git	www.git.kernel.org/linus/3bc8edc98bd43540dbe648e4ef91f443d6d20a24

02 Mar 2026 00:00Current

6Medium risk

Vulners AI Score6

CVSS 26

CVSS 37

EPSS0.00153

memory reuse setup callback client nfsd module data confidentiality data integrity service availability