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Vulnerability record · CVE-2019-12818 · published 14 June 2019

CVE-2019-12818: Linux kernel null pointer dereference vulnerability

Linux · Linux Kernel

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.

7.5 CVSS 3.0 High EPSS 6.0% · top 6.9% CWE-476 · NULL pointer dereference
7.5CVSS 3.0 base score, v2 5.0
6.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
24References
17 Jun 2026Last modified by NVD

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.

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00040.html
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00048.html
http://packetstormsecurity.com/files/154245/Kernel-Live-Patch-Security-Notice-LSN-0054-1.html
http://www.securityfocus.com/bid/108776 Third Party AdvisoryVDB Entry
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=58bdd544e2933a21a51eecf17c3f5f94038261b5 Mailing ListPatchVendor Advisory
https://github.com/torvalds/linux/commit/58bdd544e2933a21a51eecf17c3f5f94038261b5 PatchThird Party Advisory
https://security.netapp.com/advisory/ntap-20190710-0002/
https://support.f5.com/csp/article/K91444306
https://usn.ubuntu.com/4094-1/
https://usn.ubuntu.com/4118-1/
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.15 Mailing ListRelease NotesVendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00039.html
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00040.html
http://lists.opensuse.org/opensuse-security-announce/2019-06/msg00048.html
http://packetstormsecurity.com/files/154245/Kernel-Live-Patch-Security-Notice-LSN-0054-1.html
http://www.securityfocus.com/bid/108776 Third Party AdvisoryVDB Entry
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=58bdd544e2933a21a51eecf17c3f5f94038261b5 Mailing ListPatchVendor Advisory
https://github.com/torvalds/linux/commit/58bdd544e2933a21a51eecf17c3f5f94038261b5 PatchThird Party Advisory
https://security.netapp.com/advisory/ntap-20190710-0002/
https://support.f5.com/csp/article/K91444306
https://usn.ubuntu.com/4094-1/
https://usn.ubuntu.com/4118-1/
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.20.15 Mailing ListRelease NotesVendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2019-12818), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.