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NVD / CVE Program· CNA Linux

CVE-2022-50425: x86/fpu: Fix copy_xstate_to_uabi() to copy init states correctly

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.14% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 471f0aa7fa64e23766a1473b32d9ec3f0718895a, 6ff29642fd28965a8f8d6d326ac91bf6075f3113.

Low priority for now. Upgrade to Linux Linux 471f0aa7fa64e23766a1473b32d9ec3f0718895a, 6ff29642fd28965a8f8d6d326ac91bf6075f3113 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: x86/fpu: Fix copy_xstate_to_uabi() to copy init states correctly When an extended state component is not present in fpstate, but in init state, the function copies from init_fpstate via copy_feature(). But, dynamic states are not present in init_fpstate because of all-zeros init states. Then retrieving them from init_fpstate will explode like this: BUG: kernel NULL pointer dereference, address: 0000000000000000 ... RIP: 0010:memcpy_erms+0x6/0x10 ? __copy_xstate_to_uabi_buf+0x381/0x870 fpu_copy_guest_fpstate_to_uabi+0x28/0x80 kvm_arch_vcpu_ioctl+0x14c/0x1460 [kvm] ? __this_cpu_preempt_check+0x13/0x20 ? vmx_vcpu_put+0x2e/0x260 [kvm_intel] kvm_vcpu_ioctl+0xea/0x6b0 [kvm] ? kvm_vcpu_ioctl+0xea/0x6b0 [kvm] ? __fget_light+0xd4/0x130 __x64_sys_ioctl+0xe3/0x910 ? debug_smp_processor_id+0x17/0x20 ? fpregs_assert_state_consistent+0x27/0x50 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x63/0xcd Adjust the 'mask' to zero out the userspace buffer for the features that are not available both from fpstate and from init_fpstate. The dynamic features depend on the compacted XSAVE format. Ensure it is enabled before reading XCOMP_BV in init_fpstate.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Oct 1, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 3th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel5.16 and later · before 6.0.7
  • linux linux kernel6.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.16affected
    • 2308ee57d93d896618dd65c996429c9d3e469fe0 and later · before 6ff29642fd28965a8f8d6d326ac91bf6075f3113affected · git
    • 2308ee57d93d896618dd65c996429c9d3e469fe0 and later · before 471f0aa7fa64e23766a1473b32d9ec3f0718895aaffected · git
    • before 5.16not affected · semver
    • 6.0.7 and later · up to and including 6.0.*not affected · semver
    • 6.1 and laternot affected · original_commit_for_fix

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.0.7-16.0.7-1
Red Hat:enterprise_linux:9::appstreambpftool-debuginfobefore 0:5.14.0-162.22.2.el9_10:5.14.0-162.22.2.el9_1
Red Hat:enterprise_linux:9::appstreamkernel-debug-debuginfobefore 0:5.14.0-162.22.2.el9_10:5.14.0-162.22.2.el9_1
Red Hat:enterprise_linux:9::appstreamkernel-debug-develbefore 0:5.14.0-162.22.2.el9_10:5.14.0-162.22.2.el9_1
Red Hat:enterprise_linux:9::appstreamkernel-debug-devel-matchedbefore 0:5.14.0-162.22.2.el9_10:5.14.0-162.22.2.el9_1
Red Hat:enterprise_linux:9::appstreamkernel-debuginfobefore 0:5.14.0-162.22.2.el9_10:5.14.0-162.22.2.el9_1
Red Hat:enterprise_linux:9::appstreamkernel-debuginfo-common-aarch64before 0:5.14.0-162.22.2.el9_10:5.14.0-162.22.2.el9_1
Red Hat:enterprise_linux:9::appstreamkernel-debuginfo-common-ppc64lebefore 0:5.14.0-162.22.2.el9_10:5.14.0-162.22.2.el9_1
Red Hat:enterprise_linux:9::appstreamkernel-debuginfo-common-s390xbefore 0:5.14.0-162.22.2.el9_10:5.14.0-162.22.2.el9_1
Red Hat:enterprise_linux:9::appstreamkernel-debuginfo-common-x86_64before 0:5.14.0-162.22.2.el9_10:5.14.0-162.22.2.el9_1
Red Hat:enterprise_linux:9::appstreamkernel-develbefore 0:5.14.0-162.22.2.el9_10:5.14.0-162.22.2.el9_1
Red Hat:enterprise_linux:9::appstreamkernel-devel-matchedbefore 0:5.14.0-162.22.2.el9_10:5.14.0-162.22.2.el9_1
Red Hat:enterprise_linux:9::appstreamkernel-docbefore 0:5.14.0-162.22.2.el9_10:5.14.0-162.22.2.el9_1
Red Hat:enterprise_linux:9::appstreamkernel-tools-debuginfobefore 0:5.14.0-162.22.2.el9_10:5.14.0-162.22.2.el9_1
Red Hat:enterprise_linux:9::appstreamkernel-zfcpdump-debuginfobefore 0:5.14.0-162.22.2.el9_10:5.14.0-162.22.2.el9_1
Red Hat:enterprise_linux:9::appstreamkernel-zfcpdump-develbefore 0:5.14.0-162.22.2.el9_10:5.14.0-162.22.2.el9_1
Red Hat:enterprise_linux:9::appstreamkernel-zfcpdump-devel-matchedbefore 0:5.14.0-162.22.2.el9_10:5.14.0-162.22.2.el9_1
Red Hat:enterprise_linux:9::appstreamperfbefore 0:5.14.0-162.22.2.el9_10:5.14.0-162.22.2.el9_1
Red Hat:enterprise_linux:9::appstreamperf-debuginfobefore 0:5.14.0-162.22.2.el9_10:5.14.0-162.22.2.el9_1
Red Hat:enterprise_linux:9::appstreampython3-perf-debuginfobefore 0:5.14.0-162.22.2.el9_10:5.14.0-162.22.2.el9_1
Red Hat:enterprise_linux:9::baseosbpftoolbefore 0:5.14.0-162.22.2.el9_10:5.14.0-162.22.2.el9_1
Red Hat:enterprise_linux:9::baseoskernelbefore 0:5.14.0-162.22.2.el9_10:5.14.0-162.22.2.el9_1
Red Hat:enterprise_linux:9::baseoskernel-abi-stablelistsbefore 0:5.14.0-162.22.2.el9_10:5.14.0-162.22.2.el9_1
Red Hat:enterprise_linux:9::baseoskernel-corebefore 0:5.14.0-162.22.2.el9_10:5.14.0-162.22.2.el9_1

+48

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2022-50424Oct 1, 2025 · wifi: mt76: mt7921: resource leaks at mt7921_check_offload_capability()
    22Monitor
  • ← EarlierCVE-2025-39909Oct 1, 2025 · mm/damon/lru_sort: avoid divide-by-zero in damon_lru_sort_apply_parameters()
    22Monitor
  • Later →CVE-2025-39910Oct 1, 2025 · mm/vmalloc, mm/kasan: respect gfp mask in kasan_populate_vmalloc()
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux471f0aa7fa64e23766a1473b32d9ec3f0718895aVendor (CNA)
Linux Linux6ff29642fd28965a8f8d6d326ac91bf6075f3113Vendor (CNA)
debian:linux6.0.7-1 · Debian:12Package registry (OSV)
red hat:bpftool-debuginfo0:5.14.0-162.22.2.el9_1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-162.22.2.el9_1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel0:5.14.0-162.22.2.el9_1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel-matched0:5.14.0-162.22.2.el9_1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debuginfo0:5.14.0-162.22.2.el9_1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-aarch640:5.14.0-162.22.2.el9_1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-ppc64le0:5.14.0-162.22.2.el9_1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-s390x0:5.14.0-162.22.2.el9_1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-x86_640:5.14.0-162.22.2.el9_1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-devel0:5.14.0-162.22.2.el9_1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-devel-matched0:5.14.0-162.22.2.el9_1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-doc0:5.14.0-162.22.2.el9_1 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records