CVE-2019-19767: linux linux_kernel Use After Free
Vulnerability summary
CVE-2019-19767 is a medium (CVSS 5.5) Use After Free vulnerability in linux linux_kernel. EPSS estimates a 2.08% chance of exploitation in the next 30 days, higher than 81.5% 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 23 · Related 16Timeline
- 12-12-2019PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
The Linux kernel before 5.4.2 mishandles ext4_expand_extra_isize, as demonstrated by use-after-free errors in __ext4_expand_extra_isize and ext4_xattr_set_entry, related to fs/ext4/inode.c and fs/ext4/super.c, aka CID-4ea99936a163.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS trend
Probability
2.08%
Chance of exploitation in the next 30 days
Percentile
82%
Versus all other CVEs
30-day change
No change 0.00 pp
From 2.08% 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.
Ubuntu32 products
- linux< 4.15.0-88.88
- linux-aws< 4.15.0-1060.62
- linux-aws-5.0< 5.0.0-1024.27~18.04.1
- linux-aws-fips< 4.15.0-2018.18 | All versions (No fix recorded)
- linux-aws-hwe< 4.15.0-1060.62~16.04.1
Debian1 product
- linux< 5.3.15-1
Linux1 product
- linux_kernel< 5.4.2
3 vendors · 34 products
References
21 links- cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4.2X Refsource MISCREPORTRelease NotesVendor Advisory
- bugzilla.kernel.org/show_bug.cgi?id=205609X Refsource MISCREPORTExploitIssue TrackingVendor Advisory
- github.com/torvalds/linux/commit/4ea99936a1630f51fc3a2d61a58ec4a1c4b7d55aX Refsource MISCREPORTPatchThird Party Advisory
- security.netapp.com/advisory/ntap-20200103-0001/X Refsource CONFIRM
