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Vulnerability record · CVE-2020-25743 · published 6 October 2020

CVE-2020-25743: Qemu null pointer dereference vulnerability

Qemu · Qemu

hw/ide/pci.c in QEMU before 5.1.1 can trigger a NULL pointer dereference because it lacks a pointer check before an ide_cancel_dma_sync call.

3.2 CVSS 3.1 Low EPSS 0.47% · top 62.0% CWE-476 · NULL pointer dereference
3.2CVSS 3.1 base score, v2 2.1
0.47%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

hw/ide/pci.c in QEMU before 5.1.1 can trigger a NULL pointer dereference because it lacks a pointer check before an ide_cancel_dma_sync call.

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:L

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://www.openwall.com/lists/oss-security/2020/09/29/1 Mailing ListPatchThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1881409 Issue TrackingPatchThird Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2020-09/msg05967.html PatchThird Party Advisory
https://ruhr-uni-bochum.sciebo.de/s/NNWP2GfwzYKeKwE?path=%2Fide_nullptr1b Broken Link
http://www.openwall.com/lists/oss-security/2020/09/29/1 Mailing ListPatchThird Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1881409 Issue TrackingPatchThird Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2020-09/msg05967.html PatchThird Party Advisory
https://ruhr-uni-bochum.sciebo.de/s/NNWP2GfwzYKeKwE?path=%2Fide_nullptr1b Broken Link

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Source: NIST National Vulnerability Database (record CVE-2020-25743), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.