CVE-2020-27170

⚪ Do wiadomości

Błąd w jądrze Linux umożliwia ataki boczne, które omijają zabezpieczenia Spectre.

CVSS

4.7

EPSS

0.6%

Exploit

none

Vendor

canonical

Opis źródłowy (NVD)

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.

brak Brak patcha

Źródła i daty

Źródło	Wartość
NVD – CVSS	4.7
CISA KEV (aktywnie wykorzystywane)	Nie
FIRST EPSS (prawdopodobieństwo exploita)	0.6%
Opublikowano (NVD)	2021-03-20 22:15:11 UTC
Ostatnia modyfikacja (NVD)	2026-10-08 21:17:27 UTC

Referencje

http://packetstormsecurity.com/files/162117/Kernel-Live-Patch-Security-Notice-LSN-0075-1.html ([email protected]) [Third Party Advisory, VDB Entry]
http://www.openwall.com/lists/oss-security/2021/03/24/4 ([email protected]) [Mailing List, Third Party Advisory]
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.11.8 ([email protected]) [Patch, Vendor Advisory]
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f232326f6966cf2a1d1db7bc917a4ce5f9f55f76 ([email protected]) [Patch, Vendor Advisory]
https://lists.debian.org/debian-lts-announce/2021/03/msg00035.html ([email protected]) [Mailing List, Third Party Advisory]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FB6LUXPEIRLZH32YXWZVEZAD4ZL6SDK2/ ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QRTPQE73ANG7D6M4L4PK5ZQDPO4Y2FVD/ ([email protected])
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T2S3I4SLRNRUQDOFYUS6IUAZMQNMPNLG/ ([email protected])
https://www.openwall.com/lists/oss-security/2021/03/19/2 ([email protected]) [Mailing List, Patch, Third Party Advisory]