| Name | CVE-2021-3416 |
| Description | A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU in versions up to and including 5.2.0. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the host resulting in DoS scenario. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-2623-1, DLA-3099-1 |
| Debian Bugs | 984448 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| qemu (PTS) | bullseye | 1:5.2+dfsg-11+deb11u3 | fixed |
| bullseye (security) | 1:5.2+dfsg-11+deb11u2 | fixed | |
| bookworm | 1:7.2+dfsg-7+deb12u7 | fixed | |
| sid, trixie | 1:9.2.0+ds-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| qemu | source | stretch | 1:2.8+dfsg-6+deb9u14 | DLA-2623-1 | ||
| qemu | source | buster | 1:3.1+dfsg-8+deb10u9 | DLA-3099-1 | ||
| qemu | source | (unstable) | 1:5.2+dfsg-9 | 984448 |
https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07431.html
https://lists.gnu.org/archive/html/qemu-devel/2021-02/msg07484.html
https://git.qemu.org/?p=qemu.git;a=commit;h=e73adfbeec9d4e008630c814759052ed945c3fed
https://git.qemu.org/?p=qemu.git;a=commit;h=331d2ac9ea307c990dc86e6493e8f0c48d14bb33
https://git.qemu.org/?p=qemu.git;a=commit;h=1caff0340f49c93d535c6558a5138d20d475315c
https://git.qemu.org/?p=qemu.git;a=commit;h=705df5466c98f3efdd2b68d3b31dad86858acad7
https://git.qemu.org/?p=qemu.git;a=commit;h=37cee01784ff0df13e5209517e1b3594a5e792d1
https://git.qemu.org/?p=qemu.git;a=commit;h=26194a58f4eb83c5bdf4061a1628508084450ba1
https://git.qemu.org/?p=qemu.git;a=commit;h=99ccfaa1edafd79f7a3a0ff7b58ae4da7c514928
https://git.qemu.org/?p=qemu.git;a=commit;h=5311fb805a4403bba024e83886fa0e7572265de4
https://git.qemu.org/?p=qemu.git;a=commit;h=8c92060d3c0248bd4d515719a35922cd2391b9b4
https://git.qemu.org/?p=qemu.git;a=commit;h=8c552542b81e56ff532dd27ec6e5328954bdda73