CVE-2021-23133

Katalog CVE

CVSS 7.0 · High EPSS 0,48%

Kerentanan Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') pada linux kernel, fedoraproject fedora +13 lainnya. Skor CVSS 3.1 7.0 (High) menurut NVD.

Deskripsi (NVD)

A race condition in Linux kernel SCTP sockets (net/sctp/socket.c) before 5.12-rc8 can lead to kernel privilege escalation from the context of a network service or an unprivileged process. If sctp_destroy_sock is called without sock_net(sk)->sctp.addr_wq_lock then an element is removed from the auto_asconf_splist list without any proper locking. This can be exploited by an attacker with network service privileges to escalate to root or from the context of an unprivileged user directly if a BPF_CGROUP_INET_SOCK_CREATE is attached which denies creation of some SCTP socket.

Rincian

Terbit di NVD

22 April 2021

Terakhir diubah

30 Juli 2026

Status NVD

Analyzed

CVSS 3.1

7.0 (High), sumber NVD
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

EPSS (30 hari)

0,48% peluang dieksploitasi; lebih tinggi dari 39,2% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b166a20b07382b8bc1dcee2a448715c9... mailing list · patch · advisory vendor
• http://www.openwall.com/lists/oss-security/2021/05/10/1 mailing list · patch · advisory pihak ketiga
• http://www.openwall.com/lists/oss-security/2021/05/10/2 mailing list · patch · advisory pihak ketiga
• http://www.openwall.com/lists/oss-security/2021/05/10/3 mailing list · patch · advisory pihak ketiga
• http://www.openwall.com/lists/oss-security/2021/05/10/4 mailing list · patch · advisory pihak ketiga
• https://www.openwall.com/lists/oss-security/2021/04/18/2 exploit · mailing list · patch · advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2021/06/msg00019.html mitigasi · advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2021/06/msg00020.html mitigasi · advisory pihak ketiga
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CUX2CA63453G3... advisory pihak ketiga
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PAEQ3H6HKNO6K... advisory pihak ketiga
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XZASHZVCOFJ4V... advisory pihak ketiga
• https://security.netapp.com/advisory/ntap-20210611-0008/ advisory pihak ketiga