DEBIAN-CVE-2026-3842

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Source

https://security-tracker.debian.org/tracker/CVE-2026-3842

Import Source

https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-3842.json

JSON Data

https://api.test.osv.dev/v1/vulns/DEBIAN-CVE-2026-3842

Upstream

CVE-2026-3842

Published

2026-07-16T01:16:30Z

Modified

2026-09-02T09:00:17Z

Severity

7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H CVSS Calculator

Summary

[none]

Details

A flaw was found in QEMU. This vulnerability allows a local attacker within a guest virtual machine to write data beyond its allocated memory. This occurs when cpu_physical_memory_map() returns a shorter length than expected, leading to an out-of-bounds write. Successful exploitation could result in unauthorized access to guest memory or corruption of heap-allocated objects, potentially causing information disclosure, data integrity issues, or a denial of service.

References

https://security-tracker.debian.org/tracker/CVE-2026-3842

Affected packages

Debian:12 / qemu

Package

Name: qemu
Purl: pkg:deb/debian/qemu?arch=source&distro=bookworm

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

1:7.*

1:7.2+dfsg-7

1:7.2+dfsg-7+deb12u1

1:7.2+dfsg-7+deb12u2~bpo11+1

1:7.2+dfsg-7+deb12u2

1:7.2+dfsg-7+deb12u3

1:7.2+dfsg-7+deb12u4

1:7.2+dfsg-7+deb12u5

1:7.2+dfsg-7+deb12u6

1:7.2+dfsg-7+deb12u7

1:7.2+dfsg-7+deb12u8

1:7.2+dfsg-7+deb12u9

1:7.2+dfsg-7+deb12u10

1:7.2+dfsg-7+deb12u11

1:7.2+dfsg-7+deb12u12

1:7.2+dfsg-7+deb12u13

1:7.2+dfsg-7+deb12u14

1:7.2+dfsg-7+deb12u15

1:7.2+dfsg-7+deb12u16

1:7.2+dfsg-7+deb12u17

1:7.2+dfsg-7+deb12u18

1:8.*

1:8.0~rc2+dfsg-1

1:8.0~rc3+dfsg-1

1:8.0~rc3+dfsg-2

1:8.0~rc4+dfsg-1

1:8.0~rc4+dfsg-2

1:8.0+dfsg-1

1:8.0+dfsg-2

1:8.0+dfsg-3

1:8.0+dfsg-4

1:8.0.2+dfsg-1

1:8.0.2+dfsg-2

1:8.0.2+dfsg-3

1:8.0.3+dfsg-1~bpo12+1

1:8.0.3+dfsg-1

1:8.0.3+dfsg-2

1:8.0.3+dfsg-3

1:8.0.3+dfsg-4

1:8.0.3+dfsg-5

1:8.0.4+dfsg-1~bpo12+1

1:8.0.4+dfsg-1

1:8.0.4+dfsg-2

1:8.0.4+dfsg-3

1:8.1.0~rc2+dfsg-1

1:8.1.0~rc3+dfsg-1

1:8.1.0~rc3+dfsg-2

1:8.1.0~rc4+ds-1

1:8.1.0~rc4+ds-2

1:8.1.0~rc4+ds-3

1:8.1.0~rc4+ds-4

1:8.1.0+ds-1~exp1

1:8.1.0+ds-1~exp2

1:8.1.0+ds-1

1:8.1.0+ds-2

1:8.1.0+ds-3

1:8.1.0+ds-4

1:8.1.0+ds-5

1:8.1.0+ds-6

1:8.1.1+ds-1

1:8.1.1+ds-2~bpo12+1

1:8.1.1+ds-2

1:8.1.2+ds-1~bpo12+1

1:8.1.2+ds-1

1:8.1.3+ds-1

1:8.2.0~rc0+ds-1

1:8.2.0~rc1+ds-1

1:8.2.0~rc2+ds-1

1:8.2.0+ds-1

1:8.2.0+ds-2

1:8.2.0+ds-3

1:8.2.0+ds-4

1:8.2.0+ds-5~bpo12+1

1:8.2.0+ds-5

1:8.2.1+ds-1~bpo12+1

1:8.2.1+ds-1

1:8.2.1+ds-2

1:8.2.2+ds-1

1:8.2.2+ds-2

1:8.2.3+ds-1

1:8.2.3+ds-2

1:8.2.4+ds-1

1:8.2.4+ds-2

1:8.2.5+ds-1

1:8.2.5+ds-2

1:9.*

1:9.0.0~rc0+ds-1

1:9.0.0~rc0+ds-2

1:9.0.0~rc2+ds-1

1:9.0.1+ds-1~bpo12+1

1:9.0.1+ds-1

1:9.0.2+ds-1~bpo12+1

1:9.0.2+ds-1

1:9.0.2+ds-2

1:9.0.2+ds-3

1:9.0.2+ds-4

1:9.0.2+ds-5

1:9.0.2+ds-6

1:9.0.2+ds-7

1:9.1.0~rc0+ds-1

1:9.1.0~rc0+ds-2

1:9.1.0~rc0+ds-3

1:9.1.0+ds-1

1:9.1.0+ds-2

1:9.1.0+ds-3

1:9.1.0+ds-4

1:9.1.0+ds-5

1:9.1.0+ds-6

1:9.1.0+ds-7

1:9.1.0+ds-8

1:9.1.0+ds-9~exp0

1:9.1.1+ds-1

1:9.1.1+ds-2~bpo12+1

1:9.1.1+ds-2

1:9.1.1+ds-3

1:9.1.1+ds-4

1:9.1.1+ds-5

1:9.1.2+ds-1~bpo12+1

1:9.1.2+ds-1

1:9.2.0~rc0+ds-1

1:9.2.0~rc3+ds-1

1:9.2.0+ds-1~exp1

1:9.2.0+ds-1

1:9.2.0+ds-2

1:9.2.0+ds-3~bpo12+1

1:9.2.0+ds-3~bpo12+2

1:9.2.0+ds-3

1:9.2.0+ds-4

1:9.2.0+ds-5

1:9.2.1+ds-1

1:9.2.2+ds-1~bpo12+1

1:9.2.2+ds-1

1:10.*

1:10.0.0~rc0+ds-1

1:10.0.0~rc0+ds-2

1:10.0.0~rc1+ds-1

1:10.0.0~rc1+ds-2

1:10.0.0~rc2+ds-1

1:10.0.0~rc2+ds-2

1:10.0.0~rc3+ds-1

1:10.0.0~rc3+ds-2

1:10.0.0+ds-1

1:10.0.0+ds-2~bpo12+1

1:10.0.0+ds-2~bpo12+2

1:10.0.0+ds-2

1:10.0.2+ds-1

1:10.0.2+ds-2~bpo12+1

1:10.0.2+ds-2

1:10.0.3+ds-1

1:10.0.3+ds-2

1:10.0.3+ds-3

1:10.0.3+ds-4

1:10.1.0~rc0+ds-1

1:10.1.0~rc0+ds-2

1:10.1.0~rc0+ds-3

1:10.1.0~rc0+ds-4

1:10.1.0~rc1+ds-1

1:10.1.0~rc1+ds-1a

1:10.1.0~rc1+ds-1b

1:10.1.0~rc1+ds-2

1:10.1.0~rc1+ds-3

1:10.1.0~rc2+ds-1

1:10.1.0~rc3+ds-1

1:10.1.0~rc3+ds-2

1:10.1.0+ds-1

1:10.1.0+ds-2

1:10.1.0+ds-3

1:10.1.0+ds-4

1:10.1.0+ds-5

1:10.1.1+ds-1

1:10.1.2+ds-1

1:10.1.2+ds-2

1:10.1.2+ds-3

1:10.1.3+ds-1

1:10.2.0~rc1+ds-1

1:10.2.0+ds-1

1:10.2.0+ds-2

1:10.2.1+ds-1

1:10.2.2+ds-1

1:11.*

1:11.0.0~rc0+ds-1

1:11.0.0~rc0+ds-2

1:11.0.0~rc1+ds-1

1:11.0.0~rc1+ds-2

1:11.0.0~rc1+ds-3

1:11.0.0~rc2+ds-1

1:11.0.0~rc2+ds-2

1:11.0.0~rc3+ds-1

1:11.0.0+ds-1

1:11.0.0+ds-2

1:11.0.1+ds-1

1:11.0.2+ds-1

1:11.0.2+ds-2~bpo13+1

1:11.0.2+ds-2

1:11.0.3+ds-1

1:11.0.3+ds-2

1:11.1.0~rc0+ds-1

1:11.1.0~rc0+ds-2

1:11.1.0~rc1+ds-1

1:11.1.0~rc3+ds-1

1:11.1.0~rc3+ds-2

1:11.1.0+ds-1

1:11.1.0+ds-2

1:11.1.1+ds-1

Ecosystem specific

{
    "urgency":  "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-3842.json"

Debian:13 / qemu

Package

Name: qemu
Purl: pkg:deb/debian/qemu?arch=source&distro=trixie

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

1:10.0.10+ds-0+deb13u1

Affected versions

1:10.*

1:10.0.2+ds-2

1:10.0.2+ds-2+deb13u1~bpo12+1

1:10.0.2+ds-2+deb13u1

1:10.0.3+ds-0+deb13u1

1:10.0.3+ds-1

1:10.0.3+ds-2

1:10.0.3+ds-3

1:10.0.3+ds-4

1:10.0.6+ds-0+deb13u1

1:10.0.6+ds-0+deb13u2

1:10.0.7+ds-0+deb13u1

1:10.0.8+ds-0+deb13u1

Ecosystem specific

{
    "urgency":  "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-3842.json"

Debian:14 / qemu

Package

Name: qemu
Purl: pkg:deb/debian/qemu?arch=source&distro=forky

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

1:10.2.2+ds-1

Affected versions

1:10.*

1:10.0.2+ds-2

1:10.0.3+ds-1

1:10.0.3+ds-2

1:10.0.3+ds-3

1:10.0.3+ds-4

1:10.1.0~rc0+ds-1

1:10.1.0~rc0+ds-2

1:10.1.0~rc0+ds-3

1:10.1.0~rc0+ds-4

1:10.1.0~rc1+ds-1

1:10.1.0~rc1+ds-1a

1:10.1.0~rc1+ds-1b

1:10.1.0~rc1+ds-2

1:10.1.0~rc1+ds-3

1:10.1.0~rc2+ds-1

1:10.1.0~rc3+ds-1

1:10.1.0~rc3+ds-2

1:10.1.0+ds-1

1:10.1.0+ds-2

1:10.1.0+ds-3

1:10.1.0+ds-4

1:10.1.0+ds-5

1:10.1.1+ds-1

1:10.1.2+ds-1

1:10.1.2+ds-2

1:10.1.2+ds-3

1:10.1.3+ds-1

1:10.2.0~rc1+ds-1

1:10.2.0+ds-1

1:10.2.0+ds-2

1:10.2.1+ds-1

Ecosystem specific

{
    "urgency":  "not yet assigned"
}

Database specific

source

"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2026-3842.json"