by Kastro
Paper/Archive/CVE-2021-46911

CVE-2021-46911

Linux Linux — ch_ktls: Fix kernel panic

EPSS 0.6%CVSS 9.8
critical.is priorityof 100
39
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 48.7.487 × 209.7No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
Linux5a4b9fe7fece62ecab6fb28fe92362f83b41c33e – < 8d5a9dbd2116a852f8f0f91f6fbc42a0afe1091f8d5a9dbd2116a852f8f0f91f6fbc42a0afe1091fCNA
Linux5a4b9fe7fece62ecab6fb28fe92362f83b41c33e – < 8348665d4181c68b0ca1205b48e1753d78bc810f8348665d4181c68b0ca1205b48e1753d78bc810fCNA
Linux5a4b9fe7fece62ecab6fb28fe92362f83b41c33e – < 1a73e427b824133940c2dd95ebe26b6dce1cbf101a73e427b824133940c2dd95ebe26b6dce1cbf10CNA
Linux5.75.10.32CNA

Scores by source

Linux (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: partial

References

refgit.kernel.org/stable/c/8d5a9dbd2116a852f8f0f91f6fbc42a0afe1091frefgit.kernel.org/stable/c/8348665d4181c68b0ca1205b48e1753d78bc810frefgit.kernel.org/stable/c/1a73e427b824133940c2dd95ebe26b6dce1cbf10