CVE-2017-7539: qemu Reachable Assertion
Vulnerability summary
CVE-2017-7539 is a high (CVSS 7.5) Reachable Assertion vulnerability in qemu. EPSS estimates a 5.46% chance of exploitation in the next 30 days, higher than 92.7% of scored vulnerabilities.
Not severe (CVSS 5.3, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 6Timeline
- 26-07-2018PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
An assertion-failure flaw was found in Qemu before 2.10.1, in the Network Block Device (NBD) server's initial connection negotiation, where the I/O coroutine was undefined. This could crash the qemu-nbd server if a client sent unexpected data during connection negotiation. A remote user or process could use this flaw to crash the qemu-nbd server resulting in denial of service.
CVSS metrics
4 scores · 3 sources · 2 versions- CVE.orgCNA5.3MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LDiffers
- OSV · Red hatEcosystem advisory · calculated5.3MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LDiffers
EPSS trend
Probability
5.46%
Chance of exploitation in the next 30 days
Percentile
93%
Versus all other CVEs
30-day change
No change 0.00 pp
From 5.46% 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 cause- CWE-617Reachable AssertionThe product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.
- CWE-20Improper Input ValidationThe product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly.
Affected systems
Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.
Redhat7 products
- openstack6.0 | 7.0 | 8 | 9 | 10 | 11
- virtualization4.0 | 3.0
- qemu-img-rhev< 10:2.9.0-16.el7_4.5
- qemu-kvm-common-rhev< 10:2.9.0-16.el7_4.5
- qemu-kvm-rhev< 10:2.9.0-16.el7_4.5
Qemu1 product
- qemu2.10.1 | < 2.10.1
2 vendors · 8 products
References
21 links- access.redhat.com/errata/RHSA-2017:2628Vendor AdvisoryX Refsource REDHATThird Party AdvisoryAdvisory
- www.openwall.com/lists/oss-security/2017/07/21/4Mailing ListX Refsource MLISTPatchThird Party Advisory
Show all 21 references
- bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-7539X Refsource CONFIRMIssue TrackingPatchThird Party Advisory
