CVE-2020-10742

Published: 2 June 2021

A flaw was found in the Linux kernel. An index buffer overflow during Direct IO write leading to the NFS client to crash. In some cases, a reach out of the index after one memory allocation by kmalloc will cause a kernel panic. The highest threat from this vulnerability is to data confidentiality and system availability.

Notes

Author	Note
sbeattie	reproducer in Red Hat bug 1824270.

Priority

Cvss 3 Severity Score

6.0

Score breakdown

Status

Package	Release	Status
linux-aws Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1001.1)
	eoan	Not vulnerable (5.0.0-1004.4)
	focal	Not vulnerable (5.4.0-1005.5)
	trusty	Ignored (was needs-triage ESM criteria)
	xenial	Not vulnerable (4.4.0-1001.10)
	upstream	Released (3.16~rc1)
linux-aws-5.0 Launchpad, Ubuntu, Debian	bionic	Ignored (end of life, was needs-triage)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Does not exist
linux-gcp-4.15 Launchpad, Ubuntu, Debian	upstream	Released (3.16~rc1)
	bionic	Not vulnerable (4.15.0-1071.81)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	xenial	Does not exist
linux-gke-5.0 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.0.0-1011.11~18.04.1)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Does not exist
linux-gke-5.3 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.3.0-1011.12~18.04.1)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Does not exist
linux-oem Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1002.3)
	eoan	Not vulnerable (4.15.0-1035.40)
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Ignored (end of standard support, was needs-triage)
linux Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.13.0-16.19)
	eoan	Not vulnerable (5.0.0-13.14)
	focal	Not vulnerable (5.4.0-9.12)
	trusty	Ignored (was needs-triage ESM criteria)
	upstream	Released (3.16~rc1)
	xenial	Not vulnerable (4.2.0-16.19)
	Patches: Introduced by 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Fixed by 91f79c43d1b54d7154b118860d81b39bad07dfff
linux-aws-5.3 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.3.0-1016.17~18.04.1)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Does not exist
linux-aws-hwe Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Not vulnerable (4.15.0-1030.31~16.04.1)
linux-azure Launchpad, Ubuntu, Debian	bionic	Ignored (end of life, was needs-triage)
	eoan	Not vulnerable (5.0.0-1004.4)
	focal	Not vulnerable (5.4.0-1006.6)
	trusty	Ignored (was needs-triage ESM criteria)
	upstream	Released (3.16~rc1)
	xenial	Not vulnerable (4.11.0-1009.9)
linux-azure-4.15 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1082.92)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Does not exist
linux-azure-5.3 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.3.0-1007.8~18.04.1)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Does not exist
linux-azure-edge Launchpad, Ubuntu, Debian	bionic	Ignored (end of life, was needs-triage)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Does not exist
linux-gcp Launchpad, Ubuntu, Debian	bionic	Ignored (end of life, was needs-triage)
	eoan	Not vulnerable (5.0.0-1004.4)
	focal	Not vulnerable (5.4.0-1005.5)
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Not vulnerable (4.10.0-1004.4)
linux-gcp-5.3 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.3.0-1008.9~18.04.1)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Does not exist
linux-gcp-edge Launchpad, Ubuntu, Debian	bionic	Ignored (end of life, was needs-triage)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Does not exist
linux-gke-4.15 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1030.32)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Does not exist
linux-hwe Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.18.0-13.14~18.04.1)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Not vulnerable (4.8.0-36.36~16.04.1)
linux-hwe-edge Launchpad, Ubuntu, Debian	bionic	Ignored (end of life, was needs-triage)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Ignored (end of life, was needs-triage)
linux-kvm Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1002.2)
	eoan	Not vulnerable (5.0.0-1004.4)
	focal	Not vulnerable (5.4.0-1004.4)
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Not vulnerable (4.4.0-1004.9)
linux-lts-trusty Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Does not exist
linux-lts-xenial Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Does not exist
	focal	Does not exist
	trusty	Ignored (was needs-triage ESM criteria)
	upstream	Released (3.16~rc1)
	xenial	Does not exist
linux-oem-5.6 Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Does not exist
	focal	Not vulnerable (5.6.0-1007.7)
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Does not exist
linux-oem-osp1 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.0.0-1010.11)
	eoan	Not vulnerable (5.0.0-1010.11)
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Does not exist
linux-oracle Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.15.0-1007.9)
	eoan	Not vulnerable (4.15.0-1011.13)
	focal	Not vulnerable (5.4.0-1005.5)
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Not vulnerable (4.15.0-1007.9~16.04.1)
linux-oracle-5.0 Launchpad, Ubuntu, Debian	bionic	Ignored (end of life, was needs-triage)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Does not exist
linux-oracle-5.3 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.3.0-1011.12~18.04.1)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Does not exist
linux-raspi Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Does not exist
	focal	Not vulnerable (5.4.0-1007.7)
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Does not exist
linux-raspi2 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.13.0-1005.5)
	eoan	Not vulnerable (5.0.0-1006.6)
	focal	Ignored (end of life, was needs-triage)
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Not vulnerable (4.2.0-1013.19)
linux-raspi2-5.3 Launchpad, Ubuntu, Debian	bionic	Not vulnerable (5.3.0-1017.19~18.04.1)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Does not exist
linux-riscv Launchpad, Ubuntu, Debian	bionic	Does not exist
	eoan	Does not exist
	focal	Not vulnerable (5.4.0-24.28)
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Does not exist
linux-snapdragon Launchpad, Ubuntu, Debian	bionic	Not vulnerable (4.4.0-1077.82)
	eoan	Does not exist
	focal	Does not exist
	trusty	Does not exist
	upstream	Released (3.16~rc1)
	xenial	Not vulnerable (4.4.0-1013.15)

Severity score breakdown

Parameter	Value
Base score	6.0
Attack vector	Local
Attack complexity	Low
Privileges required	High
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H

References

Bugs

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