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Bug 655292 (CVE-2018-8897)

Summary: kernel: error in exception handling leads to DoS (CVE-2018-8897)
Product: Gentoo Security Reporter: GLSAMaker/CVETool Bot <glsamaker>
Component: KernelAssignee: Gentoo Kernel Security <security-kernel>
Status: RESOLVED FIXED    
Severity: normal CC: kernel, kfm
Priority: Normal    
Version: unspecified   
Hardware: All   
OS: Linux   
Whiteboard: A3 [stable blocked cve]
Package list:
Runtime testing required: ---
Bug Depends on: 653956, 653958    
Bug Blocks:    

Description GLSAMaker/CVETool Bot gentoo-dev 2018-05-08 19:24:27 UTC
CVE-2018-8897 (https://nvd.nist.gov/vuln/detail/CVE-2018-8897):
  A flaw was found in the way the Linux kernel handled exceptions delivered
  after a stack switch operation via Mov SS or Pop SS instructions. During the
  stack switch operation, the processor did not deliver interrupts and
  exceptions, rather they are delivered once the first instruction after the
  stack switch is executed. An unprivileged system user could use this flaw to
  crash the system kernel resulting in the denial of service.
Comment 2 Thomas Deutschmann gentoo-dev 2018-05-08 19:39:03 UTC
Fixed in

>=sys-kernel/gentoo-sources-4.4.125, 4.4.128 is currently being stabilized in bug 653958

>=sys-kernel/gentoo-sources-4.9.91, 4.9.95 is currently being stabilized in bug 653956
Comment 3 John Helmert III gentoo-dev Security 2022-03-26 00:40:10 UTC
Long been stabilized