CVE-2020-27675

Katalog CVE

CVSS 4.7 · Medium EPSS 0,27%

Kerentanan Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') pada linux kernel, fedoraproject fedora +1 lainnya. Skor CVSS 3.1 4.7 (Medium) menurut NVD.

Deskripsi (NVD)

An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x. drivers/xen/events/events_base.c allows event-channel removal during the event-handling loop (a race condition). This can cause a use-after-free or NULL pointer dereference, as demonstrated by a dom0 crash via events for an in-reconfiguration paravirtualized device, aka CID-073d0552ead5.

Rincian

Terbit di NVD

22 Oktober 2020

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-416: Use After Free
CWE-476: NULL Pointer Dereference

EPSS (30 hari)

0,27% peluang dieksploitasi; lebih tinggi dari 17,6% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=073d0552ead5bfc7a3a9c01de590e924f11... patch · advisory vendor
• https://xenbits.xen.org/xsa/advisory-331.html patch · advisory vendor
• https://github.com/torvalds/linux/commit/073d0552ead5bfc7a3a9c01de590e924f11b5dd2 patch · advisory pihak ketiga
• http://www.openwall.com/lists/oss-security/2021/01/19/3 mailing list · advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html mailing list · advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html mailing list · advisory pihak ketiga
• https://security.gentoo.org/glsa/202011-06 advisory pihak ketiga
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/3ZG6TZLD23QO3...
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6USZ4APZSBQDH...
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GNF2R7FUT4IOJ...