Description
An issue was discovered in the Linux kernel before 4.20.15. 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 (12)
Core 12
Core References
Patch, Third Party Advisory x_refsource_misc
https://github.com/torvalds/linux/commit/58bdd544e2933a21a51eecf17c3f5f94038261b5
Mailing List, Patch, Vendor Advisory x_refsource_misc
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=58bdd544e2933a21a51eecf17c3f5f94038261b5
Mailing List, Release Notes, Vendor Advisory x_refsource_misc
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.15
Third Party Advisory, VDB Entry vdb-entry
x_refsource_bid
http://www.securityfocus.com/bid/108776
Mailing List vendor-advisory
x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html
Mailing List vendor-advisory
x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00040.html
Mailing List vendor-advisory
x_refsource_suse
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00048.html
Vendor Advisory x_refsource_confirm
https://support.f5.com/csp/article/K91444306
Vendor Advisory x_refsource_confirm
https://security.netapp.com/advisory/ntap-20190710-0002/
Vendor Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/4094-1/
Exploit, Third Party Advisory x_refsource_misc
http://packetstormsecurity.com/files/154245/Kernel-Live-Patch-Security-Notice-LSN-0054-1.html
Vendor Advisory vendor-advisory
x_refsource_ubuntu
https://usn.ubuntu.com/4118-1/
Scores
CVSS v3
7.5
EPSS
0.0554
EPSS Percentile
90.3%
Attack Vector
NETWORK
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Details
CWE
CWE-476
Status
published
Products (1)
linux/linux_kernel
< 4.20.15
Published
Jun 14, 2019
Tracked Since
Feb 18, 2026