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NVD / CVE Program· CNA Linux

CVE-2024-38587: speakup: Fix sizeof() vs ARRAY_SIZE() bug

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 0.78% (FIRST EPSS); higher than 56.1% of all records.
  • 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 008ab3c53bc4f0b2f20013c8f6c204a3203d0b8b, 07ef95cc7a579731198c93beed281e3a79a0e586, 3726f75a1ccc16cd335c0ccfad1d92ee08ecba5e.

Low priority for now. Upgrade to Linux Linux 008ab3c53bc4f0b2f20013c8f6c204a3203d0b8b, 07ef95cc7a579731198c93beed281e3a79a0e586, 3726f75a1ccc16cd335c0ccfad1d92ee08ecba5e 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: speakup: Fix sizeof() vs ARRAY_SIZE() bug The "buf" pointer is an array of u16 values. This code should be using ARRAY_SIZE() (which is 256) instead of sizeof() (which is 512), otherwise it can the still got out of bounds.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Jun 19, 2024
Updated
Oct 15, 2026
EPSS
0.7% · 56th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.7%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
7.8
NVD has not scored this yet; the score shown is the CNA’s.

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

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.

Follow CVE-2024-38587

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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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 kernel4.19.313 and later · before 4.19.316
  • linux linux kernel5.4.275 and later · before 5.4.278
  • linux linux kernel5.10.216 and later · before 5.10.219
  • linux linux kernel5.15.157 and later · before 5.15.161
  • linux linux kernel6.1.88 and later · before 6.1.93
  • linux linux kernel6.6.29 and later · before 6.6.33
  • linux linux kernel6.8.8 and later · before 6.8.12
  • linux linux kernel6.9 and later · before 6.9.3

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

    • 6.9affected
    • 756c5cb7c09e537b87b5d3acafcb101b2ccf394f and later · before 42f0a3f67158ed6b2908d2b9ffbf7e96d23fd358affected · git
    • 8f6b62125befe1675446923e4171eac2c012959c and later · before cd7f3978c2ec741aedd1d860b2adb227314cf996affected · git
    • 6401038acfa24cba9c28cce410b7505efadd0222 and later · before 07ef95cc7a579731198c93beed281e3a79a0e586affected · git
    • 0d130158db29f5e0b3893154908cf618896450a8 and later · before 504178fb7d9f6cdb0496d5491efb05f45597e535affected · git
    • 89af25bd4b4bf6a71295f07e07a8ae7dc03c6595 and later · before 3726f75a1ccc16cd335c0ccfad1d92ee08ecba5eaffected · git
    • 8defb1d22ba0395b81feb963b96e252b097ba76f and later · before c6e1650cf5df1bd6638eeee231a683ef30c7d4ebaffected · git
    • 0efb15c14c493263cb3a5f65f5ddfd4603d19a76 and later · before eb1ea64328d4cc7d7a912c563f8523d5259716efaffected · git
    • c8d2f34ea96ea3bce6ba2535f867f0d4ee3b22e1 and later · before d52c04474feac8e305814a5228e622afe481b2efaffected · git
    • c8d2f34ea96ea3bce6ba2535f867f0d4ee3b22e1 and later · before 008ab3c53bc4f0b2f20013c8f6c204a3203d0b8baffected · git

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.94-16.1.94-1
Debian:13linuxbefore 6.8.12-16.8.12-1

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-2024-38578Jun 19, 2024 · ecryptfs: Fix buffer size for tag 66 packet
    31Monitor
  • ← EarlierCVE-2024-38579Jun 19, 2024 · crypto: bcm - Fix pointer arithmetic
    22Monitor
  • Later →CVE-2024-38589Jun 19, 2024 · netrom: fix possible dead-lock in nr_rt_ioctl()
    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 Linux008ab3c53bc4f0b2f20013c8f6c204a3203d0b8bVendor (CNA)
Linux Linux07ef95cc7a579731198c93beed281e3a79a0e586Vendor (CNA)
Linux Linux3726f75a1ccc16cd335c0ccfad1d92ee08ecba5eVendor (CNA)
Linux Linux4.19.316Vendor (CNA)
Linux Linux42f0a3f67158ed6b2908d2b9ffbf7e96d23fd358Vendor (CNA)
Linux Linux5.10.219Vendor (CNA)
Linux Linux5.15.161Vendor (CNA)
Linux Linux5.4.278Vendor (CNA)
Linux Linux504178fb7d9f6cdb0496d5491efb05f45597e535Vendor (CNA)
Linux Linux6.1.93Vendor (CNA)
Linux Linux6.6.33Vendor (CNA)
Linux Linux6.8.12Vendor (CNA)
Linux Linuxc6e1650cf5df1bd6638eeee231a683ef30c7d4ebVendor (CNA)
Linux Linuxcd7f3978c2ec741aedd1d860b2adb227314cf996Vendor (CNA)
Linux Linuxd52c04474feac8e305814a5228e622afe481b2efVendor (CNA)
Linux Linuxeb1ea64328d4cc7d7a912c563f8523d5259716efVendor (CNA)
debian:linux6.1.94-1 · Debian:12Package 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.

  • CVE-2021-4754826 days apartethernet: hisilicon: hns: hns_dsaf_misc: fix a possible array overflow in hns_dsaf_ge_srst_by_port()
    39Monitor
  • CVE-2023-2008432 days apartKernel: udmabuf: improper validation of array index leading to local privilege escalation
    32Monitor
  • CVE-2024-385420 days apartRDMA/mana_ib: boundary check before installing cq callbacks
    31Monitor
  • CVE-2024-385520 days apartdrm/amd/display: Fix potential index out of bounds in color transformation function
    31Monitor
  • CVE-2024-385560 days apartnet/mlx5: Add a timeout to acquire the command queue semaphore
    31Monitor
  • CVE-2024-385690 days apartdrivers/perf: hisi_pcie: Fix out-of-bound access when valid event group
    31Monitor

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
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
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-129 · Improper Validation of Array Index

CVSS vector

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

nvd-secondary

Attack context

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

ATT&CK techniques

—

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