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Fencer Vulns
critical 9.8

CVE-2022-30767 json

nfs_lookup_reply in net/nfs.c in Das U-Boot through 2022.04 (and through 2022.07-rc2) has an unbounded memcpy with a failed length check, l…

published 2022-05-16 4 y ago modified 2026-06-17 4 mo ago also EUVD-2022-52591

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.7%
EPSS 2.7% chance of exploitation in 30 days, percentile 86%
public exploits
0
none known

Summary

nfs_lookup_reply in net/nfs.c in Das U-Boot through 2022.04 (and through 2022.07-rc2) has an unbounded memcpy with a failed length check, leading to a buffer overflow. NOTE: this issue exists because of an incorrect fix for CVE-2019-14196.

Patch / fix

  • u-boot Debian 14, Debian 13, Debian 12 2022.07+dfsg-1

debian advisories DEBIAN-CVE-2022-30767

  • u-boot Ubuntu 18.04 LTS 2020.10+dfsg-1ubuntu0~18.04.3
  • u-boot Ubuntu 20.04 LTS 2021.01+dfsg-3ubuntu0~20.04.5
  • u-boot Ubuntu 22.04 LTS 2022.01+dfsg-2ubuntu2.3

ubuntu advisories UBUNTU-CVE-2022-30767

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • u-boot SLE Module for Basesystem 15 SP4, openSUSE Leap 15.4 2021.10-150400.4.5.1
  • u-boot-rpi3 openSUSE Leap 15.4 2021.10-150400.4.5.1
  • u-boot-rpi4 openSUSE Leap 15.4 2021.10-150400.4.5.1
  • u-boot-hikey openSUSE Leap 15.4 2021.10-150400.4.5.1
  • u-boot-poplar openSUSE Leap 15.4 2021.10-150400.4.5.1
  • u-boot-geekbox openSUSE Leap 15.4 2021.10-150400.4.5.1
  • u-boot-pineh64 openSUSE Leap 15.4 2021.10-150400.4.5.1
  • u-boot-pinebook openSUSE Leap 15.4 2021.10-150400.4.5.1

suse advisories SUSE-SU-2022:2054-1SUSE-SU-2022:2053-1SUSE-SU-2022:2052-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-23-194-04 updated cvss 9.8

Siemens SIMATIC MV500 Devices

  • Siemens SIMATIC MV540 H (6GF3540-0GE10) <V3.3.4 Siemens SIMATIC MV540 S (6GF3540-0CD10) <V3.3.4 Siemens SIMATIC MV550 H (6GF3550-0GE10) <V3.3.4 Siemens SIMATIC MV550 S (6GF3550-0CD10) <V3.3.4 Siemens SIMATIC MV560 U (6GF3560-0LE10) <V3.3.4 Siemens SIMATIC MV560 X (6GF3560-0HE10) <V3.3.4
    affected: fixed in V3.3.4 support.industry.siemens.com

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Exploit prediction

2.73% chance of exploitation in the next 30 days, higher than 86% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • securitylab.github.com https://securitylab.github.com/research/uboot-rce-nfs-vulnerability/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-120 Buffer Copy without Checking Size of Input

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.