CVE-2017-14340: linux linux_kernel NULL Pointer Dereference
Vulnerability summary
CVE-2017-14340 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux linux_kernel. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 36.1% 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 17 · Related 8Timeline
- 15-09-2017PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
The XFS_IS_REALTIME_INODE macro in fs/xfs/xfs_linux.h in the Linux kernel before 4.13.2 does not verify that a filesystem has a realtime device, which allows local users to cause a denial of service (NULL pointer dereference and OOPS) via vectors related to setting an RHINHERIT flag on a directory.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.42%
Chance of exploitation in the next 30 days
Percentile
36%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.42% 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, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu15 products
- linux< 3.13.0-135.184 | < 4.4.0-98.121
- linux-aws< 4.4.0-1039.48
- linux-azure< 4.13.0-1005.7
- linux-azure-fdeAll versions (No fix recorded)
- linux-gcp< 4.10.0-1008.8
Debian1 product
- linux< 4.12.13-1
Linux1 product
- linux_kernel≤ 4.13.1
3 vendors · 17 products
References
18 links- bugzilla.redhat.com/show_bug.cgi?id=1491344X Refsource CONFIRMIssue TrackingPatchThird Party Advisory
- github.com/torvalds/linux/commit/b31ff3cdf540110da4572e3e29bd172087af65ccX Refsource CONFIRMIssue TrackingPatchThird Party Advisory
- www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.2X Refsource CONFIRMRelease NotesVendor AdvisoryREPORT
- seclists.org/oss-sec/2017/q3/436X Refsource CONFIRMMailing ListMitigationPatchThird Party AdvisoryREPORT