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NVD / CVE Program· CNA Linux

CVE-2024-40984: ACPICA: Revert "ACPICA: avoid Info: mapping multiple BARs. Your kernel is fine."

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: 0.29% (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 434c6b924e1f4c219aab2d9e05fe79c5364e37d3, 435ecc978c3d5d0c4e172ec5b956dc1904061d98, 6eca23100e9030725f69c1babacd58803f29ec8d.
  • Severity is disputed: the assigning authority (CNA) scores it 7.8, NVD 5.5.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 434c6b924e1f4c219aab2d9e05fe79c5364e37d3, 435ecc978c3d5d0c4e172ec5b956dc1904061d98, 6eca23100e9030725f69c1babacd58803f29ec8d 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: ACPICA: Revert "ACPICA: avoid Info: mapping multiple BARs. Your kernel is fine." Undo the modifications made in commit d410ee5109a1 ("ACPICA: avoid "Info: mapping multiple BARs. Your kernel is fine.""). The initial purpose of this commit was to stop memory mappings for operation regions from overlapping page boundaries, as it can trigger warnings if different page attributes are present. However, it was found that when this situation arises, mapping continues until the boundary's end, but there is still an attempt to read/write the entire length of the map, leading to a NULL pointer deference. For example, if a four-byte mapping request is made but only one byte is mapped because it hits the current page boundary's end, a four-byte read/write attempt is still made, resulting in a NULL pointer deference. Instead, map the entire length, as the ACPI specification does not mandate that it must be within the same page boundary. It is permissible for it to be mapped across different regions.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jul 12, 2024
Updated
Oct 15, 2026
EPSS
0.2% · 22th 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 · 0.2%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.5
CNA · Linux
7.8
2.3 point gap

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

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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

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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 kernel2.6.32 and later · before 4.19.317
  • linux linux kernel4.20 and later · before 5.4.279
  • linux linux kernel5.5 and later · before 5.10.221
  • linux linux kernel5.11 and later · before 5.15.162
  • linux linux kernel5.16 and later · before 6.1.96
  • linux linux kernel6.2 and later · before 6.6.36
  • linux linux kernel6.7 and later · before 6.9.7
  • linux linux kernel6.10

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

    • 2.6.32affected
    • d410ee5109a1633a686a5663c6743a92e1181f9b and later · before 435ecc978c3d5d0c4e172ec5b956dc1904061d98affected · git
    • d410ee5109a1633a686a5663c6743a92e1181f9b and later · before ae465109d82f4fb03c5adbe85f2d6a6a3d59124caffected · git
    • d410ee5109a1633a686a5663c6743a92e1181f9b and later · before 6eca23100e9030725f69c1babacd58803f29ec8daffected · git
    • d410ee5109a1633a686a5663c6743a92e1181f9b and later · before dc5017c57f5eee80020c73ff8b67ba7f9fd08b1faffected · git
    • d410ee5109a1633a686a5663c6743a92e1181f9b and later · before ddc1f5f124479360a1fd43f73be950781d172239affected · git
    • d410ee5109a1633a686a5663c6743a92e1181f9b and later · before 434c6b924e1f4c219aab2d9e05fe79c5364e37d3affected · git
    • d410ee5109a1633a686a5663c6743a92e1181f9b and later · before e21a4c9129c72fa54dd00f5ebf71219b41d43c04affected · git
    • d410ee5109a1633a686a5663c6743a92e1181f9b and later · before a83e1385b780d41307433ddbc86e3c528db031f0affected · git
    • before 2.6.32not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:9bpftoolbefore 7.3.0-427.37.1.el9_47.3.0-427.37.1.el9_4
AlmaLinux:9kernelbefore 5.14.0-427.37.1.el9_45.14.0-427.37.1.el9_4
AlmaLinux:9kernel-64kbefore 5.14.0-427.37.1.el9_45.14.0-427.37.1.el9_4
AlmaLinux:9kernel-64k-corebefore 5.14.0-427.37.1.el9_45.14.0-427.37.1.el9_4
AlmaLinux:9kernel-64k-debugbefore 5.14.0-427.37.1.el9_45.14.0-427.37.1.el9_4
AlmaLinux:9kernel-64k-debug-corebefore 5.14.0-427.37.1.el9_45.14.0-427.37.1.el9_4
AlmaLinux:9kernel-64k-debug-develbefore 5.14.0-427.37.1.el9_45.14.0-427.37.1.el9_4
AlmaLinux:9kernel-64k-debug-devel-matchedbefore 5.14.0-427.37.1.el9_45.14.0-427.37.1.el9_4
AlmaLinux:9kernel-64k-debug-modulesbefore 5.14.0-427.37.1.el9_45.14.0-427.37.1.el9_4
AlmaLinux:9kernel-64k-debug-modules-corebefore 5.14.0-427.37.1.el9_45.14.0-427.37.1.el9_4
AlmaLinux:9kernel-64k-debug-modules-extrabefore 5.14.0-427.37.1.el9_45.14.0-427.37.1.el9_4
AlmaLinux:9kernel-64k-develbefore 5.14.0-427.37.1.el9_45.14.0-427.37.1.el9_4
AlmaLinux:9kernel-64k-devel-matchedbefore 5.14.0-427.37.1.el9_45.14.0-427.37.1.el9_4
AlmaLinux:9kernel-64k-modulesbefore 5.14.0-427.37.1.el9_45.14.0-427.37.1.el9_4
AlmaLinux:9kernel-64k-modules-corebefore 5.14.0-427.37.1.el9_45.14.0-427.37.1.el9_4
AlmaLinux:9kernel-64k-modules-extrabefore 5.14.0-427.37.1.el9_45.14.0-427.37.1.el9_4
AlmaLinux:9kernel-abi-stablelistsbefore 5.14.0-427.37.1.el9_45.14.0-427.37.1.el9_4
AlmaLinux:9kernel-corebefore 5.14.0-427.37.1.el9_45.14.0-427.37.1.el9_4
AlmaLinux:9kernel-cross-headersbefore 5.14.0-427.37.1.el9_45.14.0-427.37.1.el9_4
AlmaLinux:9kernel-debugbefore 5.14.0-427.37.1.el9_45.14.0-427.37.1.el9_4
AlmaLinux:9kernel-debug-corebefore 5.14.0-427.37.1.el9_45.14.0-427.37.1.el9_4
AlmaLinux:9kernel-debug-develbefore 5.14.0-427.37.1.el9_45.14.0-427.37.1.el9_4
AlmaLinux:9kernel-debug-devel-matchedbefore 5.14.0-427.37.1.el9_45.14.0-427.37.1.el9_4
AlmaLinux:9kernel-debug-modulesbefore 5.14.0-427.37.1.el9_45.14.0-427.37.1.el9_4

+96

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-2024-40979Jul 12, 2024 · wifi: ath12k: fix kernel crash during resume
    22Monitor
  • ← EarlierCVE-2024-40980Jul 12, 2024 · drop_monitor: replace spin_lock by raw_spin_lock
    22Monitor
  • Later →CVE-2024-40993Jul 12, 2024 · netfilter: ipset: Fix suspicious rcu_dereference_protected()
    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 Linux434c6b924e1f4c219aab2d9e05fe79c5364e37d3Vendor (CNA)
Linux Linux435ecc978c3d5d0c4e172ec5b956dc1904061d98Vendor (CNA)
Linux Linux6eca23100e9030725f69c1babacd58803f29ec8dVendor (CNA)
Linux Linuxa83e1385b780d41307433ddbc86e3c528db031f0Vendor (CNA)
Linux Linuxae465109d82f4fb03c5adbe85f2d6a6a3d59124cVendor (CNA)
Linux Linuxdc5017c57f5eee80020c73ff8b67ba7f9fd08b1fVendor (CNA)
Linux Linuxddc1f5f124479360a1fd43f73be950781d172239Vendor (CNA)
Linux Linuxe21a4c9129c72fa54dd00f5ebf71219b41d43c04Vendor (CNA)
almalinux:bpftool7.3.0-427.37.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel5.14.0-427.37.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k5.14.0-427.37.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-core5.14.0-427.37.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug5.14.0-427.37.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-core5.14.0-427.37.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel5.14.0-427.37.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel-matched5.14.0-427.37.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules5.14.0-427.37.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-core5.14.0-427.37.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-extra5.14.0-427.37.1.el9_4 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel5.14.0-427.37.1.el9_4 · AlmaLinux:9Package registry (OSV)
debian:linux6.1.99-1 · Debian:12Package registry (OSV)
red hat:bpftool-debuginfo0:7.0.0-284.84.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-debuginfo0:5.14.0-284.84.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel0:5.14.0-284.84.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel-matched0:5.14.0-284.84.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-debuginfo0:5.14.0-284.84.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-devel0:5.14.0-284.84.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-devel-matched0:5.14.0-284.84.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-284.84.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-debug-devel0:5.14.0-284.84.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)

+3

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

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

All national notices →

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 (11 more)

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

All records