Bug 1721967 (CVE-2019-12818) - CVE-2019-12818 kernel: null-pointer dereference in function nfc_llcp_build_tlv in net/nfc/llcp_commands.c
Summary: CVE-2019-12818 kernel: null-pointer dereference in function nfc_llcp_build_tl...
Keywords:
Status: CLOSED NOTABUG
Alias: CVE-2019-12818
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: 1721969
Blocks: 1722675
TreeView+ depends on / blocked
 
Reported: 2019-06-19 10:26 UTC by Dhananjay Arunesh
Modified: 2021-02-16 21:48 UTC (History)
43 users (show)

Fixed In Version:
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Last Closed: 2019-07-12 13:07:55 UTC
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Description Dhananjay Arunesh 2019-06-19 10:26:38 UTC 
An issue was discovered in the Linux kernels implementation of NFC drivers. The
nfc_llcp_build_tlv function in net/nfc/llcp_commands.c may return NULL. If the
caller does not check for this, it will trigger a NULL pointer dereference. This
will cause denial of service. This affects nfc_llcp_build_gb in
net/nfc/llcp_core.c.

References:
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=58bdd544e2933a21a51eecf17c3f5f94038261b5
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.15
https://github.com/torvalds/linux/commit/58bdd544e2933a21a51eecf17c3f5f94038261b5
Comment 1 Dhananjay Arunesh 2019-06-19 10:28:04 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1721969]
Comment 2 Justin M. Forbes 2019-06-19 13:04:37 UTC 
This issue was fixed for Fedora in the 4.20.15 stable update.
Comment 5 Product Security DevOps Team 2019-07-12 13:07:55 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-2019-12818
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