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Bug 839762 (CVE-2021-3611, CVE-2021-3750, CVE-2021-3929, CVE-2021-4158, CVE-2021-4206, CVE-2021-4207, CVE-2022-0358)

Summary: <app-emulation/qemu-7.0.0: multiple vulnerabilities
Product: Gentoo Security Reporter: John Helmert III <ajak>
Component: VulnerabilitiesAssignee: Gentoo Security <security>
Status: IN_PROGRESS ---    
Severity: normal CC: ajak, sam, tamiko, virtualization, zlogene
Priority: Normal    
Version: unspecified   
Hardware: All   
OS: Linux   
Whiteboard: B2 [glsa?]
Package list:
Runtime testing required: ---
Bug Depends on: 839765    
Bug Blocks:    

Description John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2022-04-21 01:10:38 UTC
RedHat has issued these numerous CVEs for QEMu despite
their not making the CVEs public.
Comment 1 John Helmert III archtester Gentoo Infrastructure gentoo-dev Security 2022-05-03 00:32:56 UTC
CVE-2021-3750 (

A DMA reentrancy issue was found in the USB EHCI controller emulation of QEMU. EHCI does not verify if the Buffer Pointer overlaps with its MMIO region when it transfers the USB packets. Crafted content may be written to the controller's registers and trigger undesirable actions (such as reset) while the device is still transferring packets. This can ultimately lead to a use-after-free issue. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition, or potentially execute arbitrary code within the context of the QEMU process on the host. This flaw affects QEMU versions before 7.0.0.
Comment 2 Larry the Git Cow gentoo-dev 2022-05-22 15:59:27 UTC
The bug has been referenced in the following commit(s):

commit adb5b77a6df5abbc85fbb62bd57a1465ec7a7b4b
Author:     John Helmert III <>
AuthorDate: 2022-05-19 17:25:33 +0000
Commit:     John Helmert III <>
CommitDate: 2022-05-22 15:59:11 +0000

    app-emulation/qemu: drop 6.2.0, 6.2.0-r3, 6.2.0-r4, 7.0.0_rc4
    Signed-off-by: John Helmert III <>

 app-emulation/qemu/Manifest                        |   2 -
 ...qemu-6.2.0-also-build-virtfs-proxy-helper.patch |  34 -
 ...u-6.2.0-glibc-2.35-rseq-seccomp-virtiofsd.patch |  61 --
 .../qemu/files/qemu-6.2.0-user-SLIC-crash.patch    | 173 ----
 app-emulation/qemu/metadata.xml                    |   2 -
 app-emulation/qemu/qemu-6.2.0-r3.ebuild            | 924 --------------------
 app-emulation/qemu/qemu-6.2.0-r4.ebuild            | 925 ---------------------
 app-emulation/qemu/qemu-6.2.0.ebuild               | 913 --------------------
 app-emulation/qemu/qemu-7.0.0_rc4.ebuild           | 914 --------------------
 9 files changed, 3948 deletions(-)