amd64-microcode 2.20160316.1 source package in Ubuntu
Changelog
amd64-microcode (2.20160316.1) unstable; urgency=critical * Upstream release 20160316 built from linux-firmware: + Updated Microcodes: sig 0x00600f20, patch id 0x0600084f, 2016-01-25 + This microcode updates fixes a critical erratum on NMI handling introduced by microcode patch id 0x6000832 from the 20141028 update. The erratum is also present on microcode patch id 0x6000836. + THIS IS A CRITICAL STABILITY AND SECURITY UPDATE FOR THE EARLIER AMD PILEDRIVER PROCESSORS, including: + AMD Opteron 3300, 4300, 6300 + AMD FX "Vishera" (43xx, 63xx, 83xx, 93xx, 95xx) + AMD processors with family 21, model 2, stepping 0 * Robert Święcki, while fuzzing the kernel using the syzkaller tool, uncovered very strange behavior on an AMD FX-8320, later reproduced on other AMD Piledriver model 2, stepping 0 processors including the Opteron 6300. Robert discovered, using his proof-of-concept exploit code, that the incorrect behavior allows an unpriviledged attacker on an unpriviledged VM to corrupt the return stack of the host kernel's NMI handler. At best, this results in unpredictable host behavior. At worst, it allows for an unpriviledged user on unpriviledged VM to carry a sucessful host-kernel ring 0 code injection attack. * The erratum is timing-dependant, easily triggered by workloads that cause a high number of NMIs, such as running the "perf" tool. -- Henrique de Moraes Holschuh <email address hidden> Sat, 19 Mar 2016 14:02:44 -0300
Upload details
- Uploaded by:
- Henrique de Moraes Holschuh
- Uploaded to:
- Stretch
- Original maintainer:
- Henrique de Moraes Holschuh
- Architectures:
- i386 amd64 x32
- Section:
- admin
- Urgency:
- Critically Urgent
See full publishing history Publishing
Series | Published | Component | Section | |
---|---|---|---|---|
Xenial | release | multiverse | admin |
Downloads
File | Size | SHA-256 Checksum |
---|---|---|
amd64-microcode_2.20160316.1.dsc | 1.6 KiB | 203e8720e927f261dbd5c361248bdde041016eaf4ee45626bfbfe97b0b457bce |
amd64-microcode_2.20160316.1.tar.xz | 28.4 KiB | 25c38601269a0c84f53dd6ec48136d50f600418a09557806b008f8b5d9cad72a |
Available diffs
- diff from 2.20141028.1 to 2.20160316.1 (2.3 KiB)
No changes file available.
Binary packages built by this source
- amd64-microcode: Processor microcode firmware for AMD CPUs
This package contains microcode patches for all AMD AMD64
processors. AMD releases microcode patches to correct
processor behavior as documented in the respective processor
revision guides.
.
For Intel processors, please refer to the intel-microcode package.