wifi: iwlwifi: pcie: Fix integer overflow in iwl_write_to_user_buf

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2023-53524
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-10-01 12:15:56 UTC
Updated2026-04-06 13:22:22 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

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

Problem Types: CWE-190

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 0ad8dd870aa187d0c21d032bb2c6433559075eec git Not specified
CNA Linux Linux affected f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 059e426d666a41e26b184c177c1ca3ee2d6fa1b6 git Not specified
CNA Linux Linux affected f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 82f877ec9b041edc4c7c509c605cc3393d837bf0 git Not specified
CNA Linux Linux affected f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 eb1ef44efac797b384d361a76e33f77027c29a14 git Not specified
CNA Linux Linux affected f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 de78456976026102babe66258c228691ca5677c0 git Not specified
CNA Linux Linux affected f7805b33f9b13a87b1fcf9dfbc3dcbce281a1436 58d1b717879bfeabe09b35e41ad667c79933eb2e git Not specified
CNA Linux Linux affected 5.0 Not specified
CNA Linux Linux unaffected 5.0 semver Not specified
CNA Linux Linux unaffected 5.4.244 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.181 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.113 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.30 6.1.* semver Not specified
CNA Linux Linux unaffected 6.3.4 6.3.* semver Not specified
CNA Linux Linux unaffected 6.4 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/0ad8dd870aa187d0c21d032bb2c6433559075eec 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/82f877ec9b041edc4c7c509c605cc3393d837bf0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/059e426d666a41e26b184c177c1ca3ee2d6fa1b6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/de78456976026102babe66258c228691ca5677c0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/eb1ef44efac797b384d361a76e33f77027c29a14 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/58d1b717879bfeabe09b35e41ad667c79933eb2e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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