CVE-2020-27170

תיאור (מקור, אנגלית)

An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c performs undesirable 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-f232326f6966. This affects pointer types that do not define a ptr_limit.

מדדים

CVSS 3.1

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

EPSS — סבירות ניצול

1% (אחוזון 000) נכון ל-18/10/2026

CWE

CWE-203

מוצרים מושפעים

linux: linux kernel; fedoraproject: fedora; canonical: ubuntu linux; debian: debian 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/torvalds/linux.git/commit/?id=‮… 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/torvalds/linux.git/commit/?id=‮… PatchVendor Advisory
• https://www.openwall.com/lists/oss-security/2021/03/19/2 Mailing ListPatchThird Party Advisory
• https://www.openwall.com/lists/oss-security/2021/03/19/2 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/2021/03/24/4 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…