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cve[email protected]CVE-2020-29368
HistoryNov 28, 2020 - 7:15 a.m.

CVE-2020-29368

2020-11-2807:15:11
CWE-362
web.nvd.nist.gov
265
1
cve-2020-29368
linux kernel
mm/huge_memory.c
race condition
copy-on-write
unintended write access
thp mapcount check
nvd

6.9 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:M/Au:N/C:C/I:C/A:C

7 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

6.6 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

34.6%

An issue was discovered in __split_huge_pmd in mm/huge_memory.c in the Linux kernel before 5.7.5. The copy-on-write implementation can grant unintended write access because of a race condition in a THP mapcount check, aka CID-c444eb564fb1.

Affected configurations

NVD
Node
linuxlinux_kernelRange4.5.5–4.9.228
OR
linuxlinux_kernelRange4.10–4.14.185
OR
linuxlinux_kernelRange4.15–4.19.129
OR
linuxlinux_kernelRange4.20–5.4.48
OR
linuxlinux_kernelRange5.5–5.7.5
Node
netappcloud_backupMatch-
OR
netappelement_softwareMatch-
OR
netapphci_management_nodeMatch-
OR
netappsolidfireMatch-
Node
netapphci_compute_nodeMatch-
AND
netapphci_bootstrap_osMatch-
Node
netapph410cMatch-
AND
netapph410c_firmwareMatch-

Social References

More

6.9 Medium

CVSS2

Attack Vector

LOCAL

Attack Complexity

MEDIUM

Authentication

NONE

Confidentiality Impact

COMPLETE

Integrity Impact

COMPLETE

Availability Impact

COMPLETE

AV:L/AC:M/Au:N/C:C/I:C/A:C

7 High

CVSS3

Attack Vector

LOCAL

Attack Complexity

HIGH

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

6.6 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

34.6%