| Name | CVE-2022-2962 |
| Description | A DMA reentrancy issue was found in the Tulip device emulation in QEMU. When Tulip reads or writes to the rx/tx descriptor or copies the rx/tx frame, it doesn't check whether the destination address is its own MMIO address. This can cause the device to trigger MMIO handlers multiple times, possibly leading to a stack or heap overflow. A malicious guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| Debian Bugs | 1018055 |
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 | |
| trixie | 1:9.2.0+ds-2 | fixed | |
| sid | 1:9.2.0+ds-3 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| qemu | source | buster | (not affected) | |||
| qemu | source | bullseye | (not affected) | |||
| qemu | source | (unstable) | 1:7.1+dfsg-2 | 1018055 |
[bullseye] - qemu <not-affected> (Vulnerable code not present)
[buster] - qemu <not-affected> (Vulnerable code/Tulip NIC emulator added later)
https://bugzilla.redhat.com/show_bug.cgi?id=2120631
https://gitlab.com/qemu-project/qemu/-/issues/1171
Fixed by: https://gitlab.com/qemu-project/qemu/-/commit/36a894aeb64a2e02871016da1c37d4a4ca109182 (v7.2.0-rc0)
Introduced by https://gitlab.com/qemu-project/qemu/-/commit/398f9a84ac7132e38caf7b066273734b3bf619ff (v7.0.0-rc0)