CVE-2022-49743

ovl: Use "buf" flexible array for memcpy() destination

MEDIUM
5.5
CVSS Score
Published: March 27, 2025 at 04:42 PM UTC
Updated: October 15, 2026 at 10:17 PM UTC
1 product affected across 1 vendorLinux Kernel

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: ovl: Use "buf" flexible array for memcpy() destination The "buf" flexible array needs to be the memcpy() destination to avoid false positive run-time warning from the recent FORTIFY_SOURCE hardening: memcpy: detected field-spanning write (size 93) of single field "&fh->fb" at fs/overlayfs/export.c:799 (size 21)

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 5.15.935.16 ≤ v < 6.1.115.5cbe7fba8edfc8cb8e621599e376f8ac5c224fa72
Vendor states this is fixed in 012cdef22000f3104e4fa8224ad29fde509b8caf (fixed)
Vendor states this is fixed in 07a96977b2f462337a9121302de64277b8747ab1 (fixed)
Vendor states this is fixed in a77141a06367825d639ac51b04703d551163e36c (fixed)
Vendor states this is fixed in cf8aa9bf97cadf85745506c6a3e244b22c268d63 (fixed)
Vendor states this is fixed in 5.10.248 (unaffected)
Vendor states this is fixed in 5.15.93 (unaffected)
Vendor states this is fixed in 5.5 (unaffected)
Vendor states this is fixed in 6.1.11 (unaffected)
Vendor states this is fixed in 6.2 (unaffected)

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
NVD-CWE-noinfo

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