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NVD / CVE Program· CNA Linux

CVE-2021-46953: ACPI: GTDT: Don't corrupt interrupt mappings on watchdow probe failure

MediumCVSS 6.7 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 26/100)

  • 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: 0.24% (FIRST EPSS).
  • Someone with local access to the system can trigger it. Administrator privileges are required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 1ecd5b129252249b9bc03d7645a7bda512747277, 42e69521ee1fa5abf21f478d147d06bbfe6bf6a8, 504632a3577a049dd9bb7aabae5b4476f9c586b4.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 1ecd5b129252249b9bc03d7645a7bda512747277, 42e69521ee1fa5abf21f478d147d06bbfe6bf6a8, 504632a3577a049dd9bb7aabae5b4476f9c586b4 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: ACPI: GTDT: Don't corrupt interrupt mappings on watchdow probe failure When failing the driver probe because of invalid firmware properties, the GTDT driver unmaps the interrupt that it mapped earlier. However, it never checks whether the mapping of the interrupt actially succeeded. Even more, should the firmware report an illegal interrupt number that overlaps with the GIC SGI range, this can result in an IPI being unmapped, and subsequent fireworks (as reported by Dann Frazier). Rework the driver to have a slightly saner behaviour and actually check whether the interrupt has been mapped before unmapping things.

Published
Feb 27, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 15th percentile
CWE
—

Report tools

JSON

Action score

26

Monitor

Low priority for now.

CVSS
26 / 40 · 6.7 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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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

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

    • 4.12affected
    • ca9ae5ec4ef0ed13833b03297ab319676965492c and later · before c3385a9122f8db15b453e07bfc88117fce7f3724affected · git
    • ca9ae5ec4ef0ed13833b03297ab319676965492c and later · before 7b2162db1498c71962a4bb2f776fa4e76d4d305baffected · git
    • ca9ae5ec4ef0ed13833b03297ab319676965492c and later · before 504632a3577a049dd9bb7aabae5b4476f9c586b4affected · git
    • ca9ae5ec4ef0ed13833b03297ab319676965492c and later · before e0f2d86481eaa83df33b0793f75212919db7a19daffected · git
    • ca9ae5ec4ef0ed13833b03297ab319676965492c and later · before 42e69521ee1fa5abf21f478d147d06bbfe6bf6a8affected · git
    • ca9ae5ec4ef0ed13833b03297ab319676965492c and later · before 596e079c362ac17ed02aa1b99fdc444d62072a01affected · git
    • ca9ae5ec4ef0ed13833b03297ab319676965492c and later · before 1ecd5b129252249b9bc03d7645a7bda512747277affected · git
    • before 4.12not affected · semver
    • 4.14.233 and later · up to and including 4.14.*not affected · semver
Affected versions · NVD (6)

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

  • linux linux kernel4.12.0 and later · before 4.14.233
  • linux linux kernel4.15.0 and later · before 4.19.191
  • linux linux kernel4.20.0 and later · before 5.4.118
  • linux linux kernel5.5.0 and later · before 5.10.36
  • linux linux kernel5.11.0 and later · before 5.11.20
  • linux linux kernel5.12.0 and later · before 5.12.3

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.10.38-15.10.38-1
SUSE:Linux Enterprise High Availability Extension 12 SP5kernel-defaultbefore 4.12.14-122.201.14.12.14-122.201.1
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSkernel-default-basebefore 5.3.18-150200.24.183.1.150200.9.93.25.3.18-150200.24.183.1.150200.9.93.2
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSkernel-docsbefore 5.3.18-150200.24.183.15.3.18-150200.24.183.1
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSkernel-obs-buildbefore 5.3.18-150200.24.183.15.3.18-150200.24.183.1
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSkernel-preemptbefore 5.3.18-150200.24.183.15.3.18-150200.24.183.1
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSkernel-sourcebefore 5.3.18-150200.24.183.15.3.18-150200.24.183.1
SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSkernel-symsbefore 5.3.18-150200.24.183.15.3.18-150200.24.183.1
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-64kbbefore 5.3.18-150300.59.153.25.3.18-150300.59.153.2
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-default-basebefore 5.3.18-150300.59.153.2.150300.18.90.25.3.18-150300.59.153.2.150300.18.90.2
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-docsbefore 5.3.18-150300.59.153.25.3.18-150300.59.153.2
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-obs-buildbefore 5.3.18-150300.59.153.25.3.18-150300.59.153.2
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-preemptbefore 5.3.18-150300.59.153.25.3.18-150300.59.153.2
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-sourcebefore 5.3.18-150300.59.153.25.3.18-150300.59.153.2
SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSkernel-symsbefore 5.3.18-150300.59.153.15.3.18-150300.59.153.1
SUSE:Linux Enterprise Live Patching 12 SP5kgraft-patch-SLE12-SP5_Update_54before 1-8.7.11-8.7.1
SUSE:Linux Enterprise Live Patching 15 SP2kernel-defaultbefore 5.3.18-150200.24.183.15.3.18-150200.24.183.1
SUSE:Linux Enterprise Live Patching 15 SP2kernel-livepatch-SLE15-SP2_Update_46before 1-150200.5.3.21-150200.5.3.2
SUSE:Linux Enterprise Live Patching 15 SP3kernel-defaultbefore 5.3.18-150300.59.153.25.3.18-150300.59.153.2
SUSE:Linux Enterprise Live Patching 15 SP3kernel-livepatch-SLE15-SP3_Update_42before 1-150300.7.3.21-150300.7.3.2
SUSE:Linux Enterprise Micro 5.1kernel-rtbefore 5.3.18-150300.161.15.3.18-150300.161.1
SUSE:Linux Enterprise Micro 5.1kernel-source-rtbefore 5.3.18-150300.161.15.3.18-150300.161.1
SUSE:Linux Enterprise Real Time 12 SP5kernel-rtbefore 4.12.14-10.171.14.12.14-10.171.1
SUSE:Linux Enterprise Real Time 12 SP5kernel-rt_debugbefore 4.12.14-10.171.14.12.14-10.171.1

+10

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-2021-46951Feb 27, 2024 · tpm: efi: Use local variable for calculating final log size
    22Monitor
  • ← EarlierCVE-2021-46952Feb 27, 2024 · NFS: fs_context: validate UDP retrans to prevent shift out-of-bounds
    28Monitor
  • Later →CVE-2021-46954Feb 27, 2024 · net/sched: sch_frag: fix stack OOB read while fragmenting IPv4 packets
    28Monitor

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 Linux1ecd5b129252249b9bc03d7645a7bda512747277Vendor (CNA)
Linux Linux42e69521ee1fa5abf21f478d147d06bbfe6bf6a8Vendor (CNA)
Linux Linux504632a3577a049dd9bb7aabae5b4476f9c586b4Vendor (CNA)
Linux Linux596e079c362ac17ed02aa1b99fdc444d62072a01Vendor (CNA)
Linux Linux7b2162db1498c71962a4bb2f776fa4e76d4d305bVendor (CNA)
Linux Linuxc3385a9122f8db15b453e07bfc88117fce7f3724Vendor (CNA)
Linux Linuxe0f2d86481eaa83df33b0793f75212919db7a19dVendor (CNA)
debian:linux5.10.38-1 · Debian:12Package registry (OSV)
suse:kernel-64kb5.3.18-150300.59.153.2 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSPackage registry (OSV)
suse:kernel-default5.3.18-150300.59.153.2 · SUSE:Linux Enterprise Live Patching 15 SP3Package registry (OSV)
suse:kernel-default-base5.3.18-150300.59.153.2.150300.18.90.2 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSPackage registry (OSV)
suse:kernel-docs5.3.18-150300.59.153.2 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSPackage registry (OSV)
suse:kernel-livepatch-SLE15-SP3_Update_421-150300.7.3.2 · SUSE:Linux Enterprise Live Patching 15 SP3Package registry (OSV)
suse:kernel-obs-build5.3.18-150300.59.153.2 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSPackage registry (OSV)
suse:kernel-preempt5.3.18-150300.59.153.2 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSPackage registry (OSV)
suse:kernel-rt5.3.18-150300.161.1 · SUSE:Linux Enterprise Micro 5.1Package registry (OSV)
suse:kernel-source5.3.18-150300.59.153.2 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSPackage registry (OSV)
suse:kernel-source-rt5.3.18-150300.161.1 · SUSE:Linux Enterprise Micro 5.1Package registry (OSV)
suse:kernel-syms5.3.18-150300.59.153.1 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSPackage registry (OSV)
suse:kernel-zfcpdump5.3.18-150300.59.153.2 · SUSE:Linux Enterprise Server 15 SP3-LTSSPackage 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.

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

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

Weakness class (CWE)

—

CVSS vector

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

References

Show all references (6 more)

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

All records