** Changed in: linux (Ubuntu Vivid)
Status: Fix Released => Invalid
** Changed in: linux (Ubuntu Wily)
Status: Fix Released => Invalid
** Changed in: linux-lts-vivid (Ubuntu Trusty)
Status: Fix Committed => Invalid
** Changed in: linux-lts-saucy (Ubuntu Precise)
Status: Invalid => Won't Fix
** Changed in: linux-lts-raring (Ubuntu Precise)
Status: Invalid => Won't Fix
** No longer affects: linux-lts-backport-maverick (Ubuntu)
** No longer affects: linux-lts-backport-maverick (Ubuntu Lucid)
** No longer affects: linux-lts-backport-maverick (Ubuntu Precise)
** No longer affects: linux-lts-backport-maverick (Ubuntu Trusty)
** No longer affects: linux-lts-backport-maverick (Ubuntu Utopic)
** No longer affects: linux-lts-backport-maverick (Ubuntu Vivid)
** No longer affects: linux-lts-backport-maverick (Ubuntu Wily)
** No longer affects: linux-lts-backport-natty (Ubuntu Wily)
** No longer affects: linux-lts-backport-natty (Ubuntu Vivid)
** No longer affects: linux-lts-backport-natty (Ubuntu Utopic)
** No longer affects: linux-lts-backport-natty (Ubuntu Trusty)
** No longer affects: linux-lts-backport-natty (Ubuntu Precise)
** No longer affects: linux-lts-backport-natty (Ubuntu Lucid)
** No longer affects: linux-lts-backport-natty (Ubuntu)
** Description changed:
- [execution in the early microcode loader x86/intel] Guard against stack
- overflow in the loader mc_saved_tmp is a static array allocated on the
- stack, we need to make sure mc_saved_count stays within its bounds,
- otherwise we're overflowing the stack in _save_mc(). A specially crafted
- microcode header could lead to a kernel crash or potentially kernel
- execution.
+ Stack-based buffer overflow in the get_matching_model_microcode function in
+ arch/x86/kernel/cpu/microcode/intel_early.c in the Linux kernel before 4.0
+ allows context-dependent attackers to gain privileges by constructing a
+ crafted microcode header and leveraging root privileges for write access to
+ the initrd.
Break-Fix: ec400ddeff200b068ddc6c70f7321f49ecf32ed5
f84598bd7c851f8b0bf8cd0d7c3be0d73c432ff4
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https://bugs.launchpad.net/bugs/1438504
Title:
CVE-2015-2666
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