CVE-2024-43865 s390/fpu: Re-add exception handling in load_fpu_state()

2024-08-2023:50:48

Linux

www.cve.org

linux kernel

vulnerability

resolved

s390

fpu

exception handling

load_fpu_state

lfpc instruction

floating point register.

EPSS

Percentile

9.5%

JSON

In the Linux kernel, the following vulnerability has been resolved:

s390/fpu: Re-add exception handling in load_fpu_state()

With the recent rewrite of the fpu code exception handling for the
lfpc instruction within load_fpu_state() was erroneously removed.

Add it again to prevent that loading invalid floating point register
values cause an unhandled specification exception.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "arch/s390/kernel/fpu.c"
    ],
    "versions": [
      {
        "version": "8c09871a950a",
        "lessThan": "494b14138201",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8c09871a950a",
        "lessThan": "4734406c3923",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "arch/s390/kernel/fpu.c"
    ],
    "versions": [
      {
        "version": "6.9",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.9",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10.4",
        "lessThanOrEqual": "6.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.11",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]