Security readout for executives and security teams
CVE-2020-1983 is a denial-of-service flaw in libslirp. Specially crafted packets can trigger a use-after-free condition and crash or disrupt services that rely on vulnerable libslirp versions. The business risk is service availability, not confirmed data theft or privilege escalation. Exposure is most likely where libslirp 4.2.0 or earlier is installed, or where downstream vendor advisories identify dependent packages such as qemu security updates. The source bundle does not identify every consuming product or deployment pattern. Prioritize routine-to-expedited patching for exposed or shared infrastructure. This is a high-availability risk with no sourced evidence of data compromise or active exploitation, but vulnerable packet handling can still create operational disruption. Mitigation focus: Update libslirp using the relevant OS or vendor security advisory.; Apply downstream qemu-related updates where vendor advisories name qemu packages.; Confirm packages include the upstream fix commit or vendor backport..
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
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ATT&CK lookup starting points
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CWE-416: Exact CWE lookup
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Open ATT&CK lookupCVE-2020-1983 mapping review
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Open ATT&CK lookup- Severity
- High
- CVSS
- 7.5 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
7.5HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Source materials
- CVE List V5 sourceCVE List V5
- https://gitlab.freedesktop.org/slirp/libslirp/-/issues/20CVE reference · x_refsource_MISC
- https://gitlab.freedesktop.org/slirp/libslirp/-/commit/9ac0371bb8c0a40f5d9f82a1c25129660e81df04CVE reference · x_refsource_MISC
- DSA-4665CVE reference · vendor-advisory, x_refsource_DEBIAN
- FEDORA-2020-30c45be10cCVE reference · vendor-advisory, x_refsource_FEDORA
- FEDORA-2020-1608d52724CVE reference · vendor-advisory, x_refsource_FEDORA
- USN-4372-1CVE reference · vendor-advisory, x_refsource_UBUNTU
- [debian-lts-announce] 20200629 [SECURITY] [DLA 2262-1] qemu security updateCVE reference · mailing-list, x_refsource_MLIST
- [debian-lts-announce] 20200726 [SECURITY] [DLA 2288-1] qemu security updateCVE reference · mailing-list, x_refsource_MLIST
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Use After Free
Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.