CVE-2018-14612: linux linux_kernel NULL Pointer Dereference
Vulnerability summary
CVE-2018-14612 is a high (CVSS 7.1) NULL Pointer Dereference vulnerability in linux linux_kernel. EPSS estimates a 2.56% chance of exploitation in the next 30 days, higher than 85% of scored vulnerabilities. 1 public exploit is recorded.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 6 · Related 4Timeline
- 27-07-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
An issue was discovered in the Linux kernel through 4.17.10. There is an invalid pointer dereference in btrfs_root_node() when mounting a crafted btrfs image, because of a lack of chunk block group mapping validation in btrfs_read_block_groups in fs/btrfs/extent-tree.c, and a lack of empty-tree checks in check_leaf in fs/btrfs/tree-checker.c.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS trend
Probability
2.56%
Chance of exploitation in the next 30 days
Percentile
85%
Versus all other CVEs
30-day change
No change 0.00 pp
From 2.56% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
1 foundExploit Reference (bugzilla.kernel.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu24 products
- linuxAll versions (No fix recorded) | < 4.4.0-145.171 | < 4.15.0-58.64
- linux-aws< 4.4.0-1040.43 | < 4.4.0-1079.89 | < 4.15.0-1047.49
- linux-aws-fips< 4.15.0-2018.18 | All versions (No fix recorded)
- linux-aws-hwe< 4.15.0-1047.49~16.04.1
- linux-azure< 4.15.0-1059.64~14.04.1 | < 4.15.0-1055.60 | < 5.0.0-1014.14~18.04.1
Debian1 product
- linux< 4.18.8-1
Linux1 product
- linux_kernel≤ 4.17.10
3 vendors · 26 products
References
18 links- bugzilla.kernel.org/show_bug.cgi?id=199847X Refsource MISCExploitIssue TrackingThird Party AdvisoryREPORT
