CVE-2019-18885

MEDIUMNVD 5.55.5—Elevated

5.5

fs/btrfs/volumes.c in the Linux kernel before 5.1 allows a btrfs_verify_dev_extents NULL pointer dereference via a crafted btrfs image because fs_devices->devices is mishandled within find_device, aka CID-09ba3bc9dd15.

CVSS v3: 5.5
EG Score: 5.5(medium)
EPSS: 73.0%
KEV: Not listed

Published

November 14, 2019

Last Modified

November 21, 2024

References (24)

cve@mitrehttp://packetstormsecurity.com/files/156185/Kernel-Live-Patch-Security-Notice-LSN-0062-1.html
cve@mitrehttps://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=09ba3bc9dd150457c506e4661380a6183af651c1
cve@mitrehttps://github.com/bobfuzzer/CVE-2019-18885
cve@mitrehttps://github.com/torvalds/linux/commit/09ba3bc9dd150457c506e4661380a6183af651c1
cve@mitrehttps://lists.debian.org/debian-lts-announce/2020/08/msg00019.html
cve@mitrehttps://security.netapp.com/advisory/ntap-20191205-0001/
cve@mitrehttps://usn.ubuntu.com/4254-1/
cve@mitrehttps://usn.ubuntu.com/4254-2/
cve@mitrehttps://usn.ubuntu.com/4258-1/
cve@mitrehttps://usn.ubuntu.com/4287-1/
cve@mitrehttps://usn.ubuntu.com/4287-2/
cve@mitrehttps://www.oracle.com/security-alerts/cpuApr2021.html
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/156185/Kernel-Live-Patch-Security-Notice-LSN-0062-1.html
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=09ba3bc9dd150457c506e4661380a6183af651c1
af854a3a-2127-422b-91ae-364da2661108https://github.com/bobfuzzer/CVE-2019-18885

Patch Availability(5)

Vendor / Ecosystem	Fixed in / Patch	Released	Source
ubuntu	linux-image-virtual-hwe-16.04-edge (4.15.0.88.98) @ xenial	2026-05-27	ubuntu
ubuntu	linux-image-oracle-edge (5.0.0.1010.9) @ bionic	2026-05-27	ubuntu
ubuntu	linux-image-azure (4.15.0.1069.55) @ trusty	2026-05-27	ubuntu
ubuntu	linux-image-virtual-lts-xenial (4.4.0.173.181) @ xenial	2026-05-27	ubuntu
ubuntu	linux-image-virtual-lts-xenial (4.4.0.173.152) @ trusty	2026-05-27	ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-476NULL Pointer Dereference

All Vendor Advisories

(5)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 10× in last 7d / 20× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-02 20:11 UTCepss_batch
2026-06-02 20:11 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-06-01 13:50 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 22:29 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-31 00:14 UTCepss_batch
2026-05-29 13:42 UTCepss_batch
2026-05-28 13:43 UTCepss_batch
2026-05-27 13:38 UTCepss_batch
2026-05-27 11:47 UTCEG score recompute
2026-05-27 11:47 UTCVendor advisory
2026-05-27 11:47 UTCGHSA enrichment
2026-05-26 13:42 UTCepss_batch
2026-05-26 13:42 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-26 07:17 UTCepss_batch
2026-05-25 10:16 UTCOSV refresh

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

GitHub PoCbobfuzzer/CVE-2019-18885
First seen Nov 12, 2019
Open source ↗

Frequently asked(5)

What is CVE-2019-18885?

CVE-2019-18885 is a medium vulnerability published on November 14, 2019. fs/btrfs/volumes.c in the Linux kernel before 5.1 allows a btrfsverifydevextents NULL pointer dereference via a crafted btrfs image because fsdevices->devices is mishandled within find_device, aka CID-09ba3bc9dd15.

When was CVE-2019-18885 disclosed?

CVE-2019-18885 was first published in the National Vulnerability Database on November 14, 2019, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2019-18885 actively exploited?

CVE-2019-18885 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 73.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2019-18885?

CVE-2019-18885 has a CVSS v3 base score of 5.5 (NVD).

How do I remediate CVE-2019-18885?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2019-18885, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2019-18885

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CVE-2019-18885

Published

Last Modified

References (24)

Patch Availability(5)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2019-18885?

Same vendor

Same CWE

CVE-2019-18885

📅 Published

🔄 Last Modified

🔗 References (24)

Patch Availability(5)

Weakness Classification(1)

All Vendor Advisories

Data Freshness Timeline

Publicly available exploits

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2019-18885?

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References (24)

Frequently asked(5)

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