7.5

CVE-2022-49743: ovl: Use "buf" flexible array for memcpy() destination

Modified
AliasesUBUNTU-CVE-2022-49743DEBIAN-CVE-2022-49743
Published 27-03-2025Last modified 15-10-2026

Vulnerability summary

CVE-2022-49743 is a high (CVSS 7.5) vulnerability in linux. EPSS estimates a 0.45% chance of exploitation in the next 30 days, higher than 39.3% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 7.5 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 0% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.45%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1
DLA-4475-1

Timeline

  1. 27-03-2025
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

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)

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.45%

Chance of exploitation in the next 30 days

Percentile

39%

Versus all other CVEs

30-day change

Increase +0.01 pp

From 0.44% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu114 products
  • linuxAll versions (No fix recorded) | < 5.15.0-72.79
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1036.40
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ cbe7fba8edfc8cb8e621599e376f8ac5c224fa72, < 012cdef22000f3104e4fa8224ad29fde509b8caf | ≥ cbe7fba8edfc8cb8e621599e376f8ac5c224fa72, < a77141a06367825d639ac51b04703d551163e36c | ≥ cbe7fba8edfc8cb8e621599e376f8ac5c224fa72, < 07a96977b2f462337a9121302de64277b8747ab1 | ≥ cbe7fba8edfc8cb8e621599e376f8ac5c224fa72, < cf8aa9bf97cadf85745506c6a3e244b22c268d63 | 5.5
  • linux_kernel< 5.15.93 | ≥ 5.16, < 6.1.11
Debian1 product
  • linux< 6.1.11-1

3 vendors · 117 products

References

8 links