CVE-2018-19824: canonical ubuntu_linux Use After Free
Vulnerability summary
CVE-2018-19824 is a high (CVSS 7.8) Use After Free vulnerability in canonical ubuntu_linux. EPSS estimates a 0.56% chance of exploitation in the next 30 days, higher than 46.9% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 29 · Related 21Timeline
- 03-12-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
In the Linux kernel through 4.19.6, a local user could exploit a use-after-free in the ALSA driver by supplying a malicious USB Sound device (with zero interfaces) that is mishandled in usb_audio_probe in sound/usb/card.c.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.56%
Chance of exploitation in the next 30 days
Percentile
47%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.56% 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
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.
Ubuntu20 products
- linux< 3.13.0-168.218 | < 4.4.0-142.168 | < 4.15.0-47.50
- linux-aws< 4.4.0-1038.41 | < 4.4.0-1075.85 | < 4.15.0-1035.37
- linux-aws-hwe< 4.15.0-1035.37~16.04.1
- linux-azure< 4.15.0-1041.45~14.04.1 | < 4.15.0-1041.45 | < 4.18.0-1014.14~18.04.1
- linux-azure-fdeAll versions (No fix recorded)
Debian2 products
- linux< 4.19.9-1
- debian_linuxEOL8.0
Canonical1 product
- ubuntu_linuxEOL12.04 | 14.04 | 16.04 | 18.04 | 18.10
Linux1 product
- linux_kernel≤ 4.19.6
4 vendors · 24 products
References
28 links- github.com/torvalds/linux/commit/5f8cf712582617d523120df67d392059eaf2fc4bX Refsource MISCPatchVendor Advisory
lists.debian.org/debian-lts-announce/2019/03/msg00034.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.debian.org/debian-lts-announce/2019/04/msg00004.htmlMailing ListX Refsource MLISTThird Party Advisory
Show all 28 references
- lists.debian.org/debian-lts-announce/2019/05/msg00002.htmlMailing ListX Refsource MLISTThird Party Advisory