Qemu-kvm: virtio-snd: heap buffer overflow in virtio_snd_pcm_in_cb (incomplete fix for cve-2024-7730)
A flaw was found in QEMU. When reading input audio in the virtio-snd device input callback, the `virtio_snd_pcm_in_cb` function did not check whether the iov could fit the data buffer, potentially leading to a heap out-of-bounds write. This issue exists due to an incomplete fix for CVE-2024-7730.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for help- Published
- Jun 19, 2026
- Updated
- Sep 1, 2026
- EPSS
- 0.2% · 6th percentile
- CWE
- CWE-122
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Report tools
Action score
29
Monitor
Low priority for now.
- CVSS
- 29 / 40 · 7.4 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · fedora
- 7.4
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
| Vendor | Product | CPE |
|---|---|---|
| enterprise linux | 10 | cpe:2.3:redhat:enterprise_linux:10 |
| enterprise linux | 6 | cpe:2.3:redhat:enterprise_linux:6 |
| enterprise linux | 7 | cpe:2.3:redhat:enterprise_linux:7 |
| enterprise linux | 8 | cpe:2.3:redhat:enterprise_linux:8 |
| enterprise linux | 9 | cpe:2.3:redhat:enterprise_linux:9 |
| openshift | 4 | cpe:2.3:redhat:openshift:4 |
Versions reported by the vendor
Affected version ranges reported by the assigning authority (fedora). Independent of NVD's CPE analysis and usually ahead of it.
gitlab.com/qemu-project/qemu qemu
- 8.2.0 and later · up to and including 10.2.1affected · semver
Red Hat Red Hat Enterprise Linux 10
- all versionsunknown
Red Hat Red Hat Enterprise Linux 6
- all versionsunknown
Red Hat Red Hat Enterprise Linux 7
- all versionsunknown
- all versionsunknown
Red Hat Red Hat Enterprise Linux 8
- all versionsunknown
Red Hat Red Hat Enterprise Linux 9
- all versionsunknown
Red Hat Red Hat OpenShift Container Platform 4
- all versionsunknown
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:13 | qemu | before 1:10.0.10+ds-0+deb13u1 | 1:10.0.10+ds-0+deb13u1 |
| Debian:14 | qemu | before 1:10.2.2+ds-1 | 1:10.2.2+ds-1 |
| openSUSE:Leap 16.0 | qemu | before 10.0.9-160000.1.1 | 10.0.9-160000.1.1 |
| openSUSE:Leap 16.0 | qemu-linux-user | before 10.0.9-160000.1.1 | 10.0.9-160000.1.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP7 | qemu | before 9.2.4-150700.3.20.1 | 9.2.4-150700.3.20.1 |
| SUSE:Linux Enterprise Module for Package Hub 15 SP7 | qemu-linux-user | before 9.2.4-150700.3.20.1 | 9.2.4-150700.3.20.1 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | qemu | before 8.2.10-150600.3.49.1 | 8.2.10-150600.3.49.1 |
| SUSE:Linux Micro 6.2 | qemu | before 10.0.9-160000.1.1 | 10.0.9-160000.1.1 |
Same product
red hat: all recordsOther highest-scoring records for the same primary product.
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- CVE-2026-4631Cockpit: cockpit: unauthenticated remote code execution due to ssh command-line argument injection42Plan
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- CVE-2025-4404Freeipa: idm: privilege escalation from host to domain admin in freeipa37Monitor
- CVE-2025-7493Freeipa: idm: privilege escalation from host to domain admin in freeipa36Monitor
- CVE-2025-49796Libxml: type confusion leads to denial of service (dos)36Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:qemu | 1:10.0.10+ds-0+deb13u1 · Debian:13 | Package registry (OSV) |
| opensuse:qemu | 10.0.9-160000.1.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| opensuse:qemu-linux-user | 10.0.9-160000.1.1 · openSUSE:Leap 16.0 | Package registry (OSV) |
| suse:qemu | 10.0.9-160000.1.1 · SUSE:Linux Micro 6.2 | Package registry (OSV) |
| suse:qemu-linux-user | 9.2.4-150700.3.20.1 · SUSE:Linux Enterprise Module for Package Hub 15 SP7 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2026-527204 days apartGstreamer1-plugins-bad-free: gstreamer: heap buffer overflow via crafted vnc server rectangle in librfb35Monitor
- CVE-2026-8166577 days apartCorosync: corosync: heap-based buffer overflow in totempg assembly buffer during fragmented message reassembly30Monitor
- CVE-2026-1291210 days apartLibtiff: libtiff: heap-based buffer overflow via crafted pixarlog-compressed tiff image29Monitor
- CVE-2026-489147 days apartQemu-kvm: heap buffer overflow in virtio-blk scsi request handling26Monitor
- CVE-2026-1893849 days apartP11-kit: integer overflow in rpc attribute-array length calculation can under-allocate nested attribute storage on 32 bit systems24Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Someone with local access to the system can trigger it.
- No account or password is required.
- No user action is required.
- Special conditions such as timing or configuration are required.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- High
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-122 · Heap-based Buffer OverflowCVSS vector
CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-secondary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- access.redhat.com/security/cve/CVE-2026-3195
- bugzilla.redhat.com/show_bug.cgi?id=2443817
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3195.json
Vendor advisories and official records. Exploit/PoC links are deliberately left out.