CVE-2020-27171

תיאור (מקור, אנגלית)

An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c has an off-by-one error (with a resultant integer underflow) affecting out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory, aka CID-10d2bb2e6b1d.

מדדים

CVSS 3.1

6.0 (MEDIUM) מקור הציון: NVD CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H

EPSS — סבירות ניצול

1% (אחוזון 000) נכון ל-18/10/2026

CWE

CWE-193

מוצרים מושפעים

linux: linux kernel; fedoraproject: fedora; debian: debian linux; canonical: ubuntu linux

קישורים

• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.8 PatchVendor Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/patch/?id=10d2bb2e‮… PatchVendor Advisory
• https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.8 PatchVendor Advisory
• https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf.git/patch/?id=10d2bb2e‮… PatchVendor Advisory
• https://www.openwall.com/lists/oss-security/2021/03/19/3 Mailing ListPatchThird Party Advisory
• https://www.openwall.com/lists/oss-security/2021/03/19/3 Mailing ListPatchThird Party Advisory
• http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-‮… Third Party AdvisoryVDB Entry
• http://www.openwall.com/lists/oss-security/2021/03/24/5 Mailing ListThird Party Advisory
• https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html Mailing ListThird Party Advisory
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorap‮…