Is CVE-2022-26496 in the CISA KEV catalog?

No. CVE-2022-26496 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-26496?

CVE-2022-26496 has a CVSS v3 base score of 9.8 (CRITICAL).

What is the EPSS score for CVE-2022-26496?

CVE-2022-26496 has an EPSS score of 3.47% (88th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-26496?

Upgrade nbd on debian 11 to 1:3.21-1+deb11u1 or later. Fixes are available for 3 affected products.

CVE & CISA-KEV Catalog

CVE-2022-26496

CRITICALEPSS 88th pctl

9.8

CVSS v3

NVD

Description

In nbd-server in nbd before 3.24, there is a stack-based buffer overflow. An attacker can cause a buffer overflow in the parsing of the name field by sending a crafted NBD_OPT_INFO or NBD_OPT_GO message with an large value as the length of the name.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

nbdDebian

Fixed in:1:3.21-1+deb11u1CVE-2022-26496

Fixed in:1:3.24-1CVE-2022-26496

nbdUbuntu

Fixed in:1:3.16.2-1ubuntu0.2USN-5323-1

Fixed in:1:3.20-1ubuntu0.1USN-5323-1

nbd-serverUbuntu

Fixed in:1:3.16.2-1ubuntu0.2USN-5323-1

Fixed in:1:3.20-1ubuntu0.1USN-5323-1

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

3.47%probability of exploitation in 30 days

88thpercentile

Elevated risk: more likely to be exploited than 88% of all known CVEs.

References

Exploit1

lists.debian.org

Third-Party Advisory3

Other references5

Related Vulnerabilities

Other CWE-787 (Out-of-bounds Write) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2025-22457	Critical	9.0	100%	KEV + Ransom	Fix
CVE-2025-0282	Critical	9.0	100%	KEV + Ransom	-
CVE-2015-3113	Critical	9.8	100%	KEV	Fix
CVE-2021-20038	Critical	9.8	100%	KEV + Ransom	-
CVE-2023-4863	High	8.8	100%	KEV	Fix
CVE-2020-16040	Medium	6.5	100%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.