Bug 1919900 (CVE-2020-27830) - CVE-2020-27830 kernel: null pointer dereference in in spk_ttyio_receive_buf2
Summary: CVE-2020-27830 kernel: null pointer dereference in in spk_ttyio_receive_buf2
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2020-27830
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1919903
Blocks: 1919902 1939850
TreeView+ depends on / blocked
 
Reported: 2021-01-25 11:39 UTC by Dhananjay Arunesh
Modified: 2021-05-12 05:49 UTC (History)
46 users (show)

Fixed In Version: kernel 5.9.14
Doc Type: If docs needed, set a value
Doc Text:
A vulnerability was found in Linux Kernel where in the spk_ttyio_receive_buf2() function, it would dereference spk_ttyio_synth without checking whether it is NULL or not, and may lead to a NULL-ptr deref crash.
Clone Of:
Environment:
Last Closed: 2021-01-28 14:41:37 UTC

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Description Dhananjay Arunesh 2021-01-25 11:39:12 UTC 
A vulnerability was found in Linux Kernel, where in the spk_ttyio_receive_buf2() function, it would dereference spk_ttyio_synth without checking whether it is NULL or not, and may lead to a NULL-ptr deref crash.

References:
https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git/commit/?h=char-misc-linus&id=f0992098cadb4c9c6a00703b66cafe604e178fea
Comment 1 Dhananjay Arunesh 2021-01-25 11:41:31 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1919903]
Comment 2 Justin M. Forbes 2021-01-25 17:31:10 UTC 
This was fixed for Fedora with the 5.9.14 stable kernel updates.
Comment 3 Product Security DevOps Team 2021-01-28 14:41:37 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2020-27830
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