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NVD / CVE Program· CNA Linux

CVE-2023-53524: wifi: iwlwifi: pcie: Fix integer overflow in iwl_write_to_user_buf

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: 0.17% (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 059e426d666a41e26b184c177c1ca3ee2d6fa1b6, 0ad8dd870aa187d0c21d032bb2c6433559075eec, 58d1b717879bfeabe09b35e41ad667c79933eb2e.

Low priority for now. Upgrade to Linux Linux 059e426d666a41e26b184c177c1ca3ee2d6fa1b6, 0ad8dd870aa187d0c21d032bb2c6433559075eec, 58d1b717879bfeabe09b35e41ad667c79933eb2e 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: wifi: iwlwifi: pcie: Fix integer overflow in iwl_write_to_user_buf An integer overflow occurs in the iwl_write_to_user_buf() function, which is called by the iwl_dbgfs_monitor_data_read() function. static bool iwl_write_to_user_buf(char __user *user_buf, ssize_t count, void *buf, ssize_t *size, ssize_t *bytes_copied) { int buf_size_left = count - *bytes_copied; buf_size_left = buf_size_left - (buf_size_left % sizeof(u32)); if (*size > buf_size_left) *size = buf_size_left; If the user passes a SIZE_MAX value to the "ssize_t count" parameter, the ssize_t count parameter is assigned to "int buf_size_left". Then compare "*size" with "buf_size_left" . Here, "buf_size_left" is a negative number, so "*size" is assigned "buf_size_left" and goes into the third argument of the copy_to_user function, causing a heap overflow. This is not a security vulnerability because iwl_dbgfs_monitor_data_read() is a debugfs operation with 0400 privileges.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Oct 1, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 6th 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 · 0.1%

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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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  • 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 kernel5.0 and later · before 5.4.244
  • linux linux kernel5.5 and later · before 5.10.181
  • linux linux kernel5.11 and later · before 5.15.113
  • linux linux kernel5.16 and later · before 6.1.30
  • linux linux kernel6.2 and later · before 6.3.4

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

    • 5.0affected
    • f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 and later · before 0ad8dd870aa187d0c21d032bb2c6433559075eecaffected · git
    • f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 and later · before 059e426d666a41e26b184c177c1ca3ee2d6fa1b6affected · git
    • f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 and later · before 82f877ec9b041edc4c7c509c605cc3393d837bf0affected · git
    • f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 and later · before eb1ef44efac797b384d361a76e33f77027c29a14affected · git
    • f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 and later · before de78456976026102babe66258c228691ca5677c0affected · git
    • f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 and later · before 58d1b717879bfeabe09b35e41ad667c79933eb2eaffected · git
    • before 5.0not affected · semver
    • 5.4.244 and later · up to and including 5.4.*not affected · semver
    • 5.10.181 and later · up to and including 5.10.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.37-16.1.37-1
Debian:13linuxbefore 6.3.7-16.3.7-1

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-2023-53521Oct 1, 2025 · scsi: ses: Fix slab-out-of-bounds in ses_intf_remove()
    28Monitor
  • ← EarlierCVE-2023-53522Oct 1, 2025 · cgroup,freezer: hold cpu_hotplug_lock before freezer_mutex
    31Monitor
  • Later →CVE-2023-53525Oct 1, 2025 · RDMA/cma: Allow UD qp_type to join multicast only
    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 Linux059e426d666a41e26b184c177c1ca3ee2d6fa1b6Vendor (CNA)
Linux Linux0ad8dd870aa187d0c21d032bb2c6433559075eecVendor (CNA)
Linux Linux58d1b717879bfeabe09b35e41ad667c79933eb2eVendor (CNA)
Linux Linux82f877ec9b041edc4c7c509c605cc3393d837bf0Vendor (CNA)
Linux Linuxde78456976026102babe66258c228691ca5677c0Vendor (CNA)
Linux Linuxeb1ef44efac797b384d361a76e33f77027c29a14Vendor (CNA)
debian:linux6.1.37-1 · 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-2026-31633205 days apartrxrpc: Fix integer overflow in rxgk_verify_response()
    39Monitor
  • CVE-2026-31649205 days apartnet: stmmac: fix integer underflow in chain mode
    39Monitor
  • CVE-2026-31659205 days apartbatman-adv: reject oversized global TT response buffers
    39Monitor
  • CVE-2026-43341219 days apartnet/ipv6: ioam6: prevent schema length wraparound in trace fill
    39Monitor
  • CVE-2026-46039238 days apartrxgk: Fix potential integer overflow in length check
    39Monitor
  • CVE-2026-46325251 days apartRDMA/rxe: Fix iova-to-va conversion for MR page sizes != PAGE_SIZE
    39Monitor

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-190 · Integer Overflow or Wraparound

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/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.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

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

References

Show all references (5 more)

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

All records