CVE-2020-10711: canonical ubuntu_linux NULL Pointer Dereference
Vulnerability summary
CVE-2020-10711 is a medium (CVSS 5.9) NULL Pointer Dereference vulnerability in canonical ubuntu_linux. EPSS estimates a 3.08% chance of exploitation in the next 30 days, higher than 87.7% of scored vulnerabilities.
Not severe (CVSS 5.9, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 43 · Related 22Timeline
- 22-05-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
A NULL pointer dereference flaw was found in the Linux kernel's SELinux subsystem in versions before 5.7. This flaw occurs while importing the Commercial IP Security Option (CIPSO) protocol's category bitmap into the SELinux extensible bitmap via the' ebitmap_netlbl_import' routine. While processing the CIPSO restricted bitmap tag in the 'cipso_v4_parsetag_rbm' routine, it sets the security attribute to indicate that the category bitmap is present, even if it has not been allocated. This issue leads to a NULL pointer dereference issue while importing the same category bitmap into SELinux. This flaw allows a remote network user to crash the system kernel, resulting in a denial of service.
CVSS metrics
6 scores · 5 sources · 2 versions- OSV · Red hatEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- NVDNIST5.9MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
3.08%
Chance of exploitation in the next 30 days
Percentile
88%
Versus all other CVEs
30-day change
No change 0.00 pp
From 3.08% 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
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu41 products
- linuxAll versions (No fix recorded) | < 4.4.0-185.215 | < 4.15.0-109.110 | < 5.4.0-40.44
- linux-aws< 4.4.0-1074.78 | < 4.4.0-1110.121 | < 4.15.0-1077.81 | < 5.4.0-1018.18
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.3< 5.3.0-1030.32~18.04.1
- linux-aws-fips< 4.15.0-2022.22 | All versions (No fix recorded)
Redhat31 products
- 3scale2.0
- enterprise_linuxEOL6.0 | 7.0 | 8.0
- enterprise_linux_aus7.4
- enterprise_linux_server_tus7.4
- messaging_realtime_grid2.0
Debian2 products
- linux< 5.6.14-1
- debian_linuxEOL8.0 | 9.0 | 10.0
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 18.04 | 19.10 | 20.04
Linux1 product
- linux_kernel< 5.7
Opensuse1 product
- leapEOL15.1 | 15.2
Red hat1 product
- kernelall kernel versions before 5.7
7 vendors · 78 products
References
30 links- bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10711X Refsource CONFIRMIssue TrackingPatchThird Party Advisory
- www.openwall.com/lists/oss-security/2020/05/12/2X Refsource CONFIRMREPORTMailing ListPatchThird Party Advisory
lists.debian.org/debian-lts-announce/2020/06/msg00012.htmlMailing ListX Refsource MLISTThird Party Advisory- lists.opensuse.org/opensuse-security-announce/2020-06/msg00022.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00008.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
