CVE-2018-13093: linux linux_kernel NULL Pointer Dereference
Vulnerability summary
CVE-2018-13093 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux linux_kernel. EPSS estimates a 1.73% chance of exploitation in the next 30 days, higher than 77.5% of scored vulnerabilities.
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 20 · Related 16Timeline
- 03-07-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
An issue was discovered in fs/xfs/xfs_icache.c in the Linux kernel through 4.17.3. There is a NULL pointer dereference and panic in lookup_slow() on a NULL inode->i_ops pointer when doing pathwalks on a corrupted xfs image. This occurs because of a lack of proper validation that cached inodes are free during allocation.
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
1.73%
Chance of exploitation in the next 30 days
Percentile
78%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.73% 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
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu22 products
- linuxAll versions (No fix recorded) | < 3.13.0-218.269 | < 4.4.0-201.233 | < 4.15.0-58.64
- linux-aws< 4.4.0-1085.89 | < 4.4.0-1121.135 | < 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 | < 4.18.0-1011.11~18.04.1
Debian1 product
- linux< 4.17.14-1
Linux1 product
- linux_kernel≤ 4.17.3
3 vendors · 24 products
References
16 links- github.com/torvalds/linux/commit/afca6c5b2595fc44383919fba740c194b0b76affX Refsource MISCPatchREPORT
