CVE-2020-14356: canonical ubuntu_linux NULL Pointer Dereference
Vulnerability summary
CVE-2020-14356 is a high (CVSS 7.8) NULL Pointer Dereference vulnerability in canonical ubuntu_linux. EPSS estimates a 1.00% chance of exploitation in the next 30 days, higher than 63% of scored vulnerabilities. 2 public exploits are recorded.
Public exploit (reference, Date unknown)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 19 · Related 15Timeline
- 19-08-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A flaw null pointer dereference in the Linux kernel cgroupv2 subsystem in versions before 5.7.10 was found in the way when reboot the system. A local user could use this flaw to crash the system or escalate their privileges on the system.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
1.00%
Chance of exploitation in the next 30 days
Percentile
63%
Versus all other CVEs
30-day change
No change 0.00 pp
From 1.00% 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
2 foundExploit Reference (bugzilla.kernel.org)
Maturity: unknown
Exploit Reference (lore.kernel.org)
Maturity: unknown
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu93 products
- linux< 4.15.0-118.119 | All versions (No fix recorded)
- linux-aws< 4.15.0-1083.87 | All versions (No fix recorded)
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.15All versions (No fix recorded)
- linux-aws-5.3< 5.3.0-1034.36
Netapp5 products
Debian2 products
- linux< 5.7.10-1
- debian_linuxEOL9.0
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 18.04 | 20.04
Linux1 product
- linux_kernel≥ 4.5, < 4.9.231 | ≥ 4.10, < 4.14.189 | ≥ 4.15, < 4.19.134 | ≥ 4.20, < 5.4.53 | ≥ 5.5, < 5.7.10
Opensuse1 product
- leapEOL15.1 | 15.2
Redhat1 product
7 vendors · 104 products
References
19 links- bugzilla.kernel.org/show_bug.cgi?id=208003X Refsource MISCREPORTExploitIssue TrackingVendor Advisory
- lore.kernel.org/netdev/CAM_iQpUKQJrj8wE+Qa8NGR3P0L+5Uz=qo-O5+k_P60HzTde6aw%40mail.gmail.com/t/X Refsource MISCREPORTExploitVendor Advisory
- lists.opensuse.org/opensuse-security-announce/2020-08/msg00047.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-09/msg00007.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
lists.debian.org/debian-lts-announce/2020/09/msg00025.htmlMailing ListX Refsource MLISTThird Party Advisory
Show all 19 references
- lists.debian.org/debian-lts-announce/2020/10/msg00032.htmlMailing ListX Refsource MLISTThird Party Advisory
- lists.debian.org/debian-lts-announce/2020/10/msg00034.htmlMailing ListX Refsource MLISTThird Party Advisory
