Unrated severityNVD Advisory· Published May 26, 2021· Updated Aug 3, 2024
CVE-2021-3527
CVE-2021-3527
Description
A flaw was found in the USB redirector device (usb-redir) of QEMU. Small USB packets are combined into a single, large transfer request, to reduce the overhead and improve performance. The combined size of the bulk transfer is used to dynamically allocate a variable length array (VLA) on the stack without proper validation. Since the total size is not bounded, a malicious guest could use this flaw to influence the array length and cause the QEMU process to perform an excessive allocation on the stack, resulting in a denial of service.
Affected products
1Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
8- security.gentoo.org/glsa/202208-27mitrevendor-advisoryx_refsource_GENTOO
- bugzilla.redhat.com/show_bug.cgimitrex_refsource_MISC
- gitlab.com/qemu-project/qemu/-/commit/05a40b172e4d691371534828078be47e7fff524cmitrex_refsource_MISC
- gitlab.com/qemu-project/qemu/-/commit/7ec54f9eb62b5d177e30eb8b1cad795a5f8d8986mitrex_refsource_MISC
- lists.debian.org/debian-lts-announce/2021/09/msg00000.htmlmitremailing-listx_refsource_MLIST
- lists.debian.org/debian-lts-announce/2022/09/msg00008.htmlmitremailing-listx_refsource_MLIST
- security.netapp.com/advisory/ntap-20210708-0008/mitrex_refsource_CONFIRM
- www.openwall.com/lists/oss-security/2021/05/05/5mitrex_refsource_MISC
News mentions
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