CVE-2020-13659: canonical ubuntu_linux NULL Pointer Dereference
Vulnerability summary
CVE-2020-13659 is a low (CVSS 2.5) NULL Pointer Dereference vulnerability in canonical ubuntu_linux. EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 37.1% of scored vulnerabilities.
Not severe (CVSS 2.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 13 · Related 11Timeline
- 02-06-2020PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
address_space_map in exec.c in QEMU 4.2.0 can trigger a NULL pointer dereference related to BounceBuffer.
CVSS metrics
5 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated2.5LowCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:L
- OSV · DebianEcosystem advisory · calculated2.5LowCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:L
- OSV · AlpineEcosystem advisory · calculated2.5LowCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:L
EPSS trend
Probability
0.43%
Chance of exploitation in the next 30 days
Percentile
37%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.43% 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, administrative account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian2 products
- qemu< 1:5.0-6
- debian_linuxEOL9.0 | 10.0
Alpine1 product
- qemu< 5.0.0-r0
Canonical1 product
- ubuntu_linuxEOL16.04 | 18.04 | 20.04
Opensuse1 product
- leapEOL15.2
Qemu1 product
- qemu4.2.0
Ubuntu1 product
- qemu< 2.0.0+dfsg-2ubuntu1.47+esm1 | < 1:2.5+dfsg-5ubuntu10.45 | < 1:2.11+dfsg-1ubuntu7.31 | < 1:4.2-3ubuntu6.4
6 vendors · 7 products
References
15 links- lists.gnu.org/archive/html/qemu-devel/2020-05/msg07313.htmlX Refsource MISCREPORTMailing ListPatchThird Party Advisory
- www.openwall.com/lists/oss-security/2020/06/01/3X Refsource CONFIRMMailing ListPatchThird Party Advisory
- lists.debian.org/debian-lts-announce/2020/07/msg00020.htmlMailing ListX Refsource MLISTThird Party Advisory
- lists.opensuse.org/opensuse-security-announce/2020-07/msg00086.htmlVendor AdvisoryX Refsource SUSEBroken LinkMailing ListThird Party Advisory
