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nvd416baaa9-dc9f-4396-8d5f-8c081fb06d67NVD:CVE-2021-46911
HistoryFeb 27, 2024 - 7:15 a.m.

CVE-2021-46911

2024-02-2707:15:07
416baaa9-dc9f-4396-8d5f-8c081fb06d67
web.nvd.nist.gov
linux kernel
ch_ktls
vulnerability
kernel panic
page refcount
tx_ctx lock
skb transmit
page cleanup
ack received

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

5.2 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

5.1%

In the Linux kernel, the following vulnerability has been resolved:

ch_ktls: Fix kernel panic

Taking page refcount is not ideal and causes kernel panic
sometimes. It’s better to take tx_ctx lock for the complete
skb transmit, to avoid page cleanup if ACK received in middle.

Affected configurations

NVD
Node
linuxlinux_kernelRange5.7.05.10.32
OR
linuxlinux_kernelRange5.11.05.11.16

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

5.2 Medium

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

5.1%