Is CVE-2017-1000255 in the CISA KEV catalog?

No. CVE-2017-1000255 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2017-1000255?

CVE-2017-1000255 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2017-1000255?

CVE-2017-1000255 has an EPSS score of 0.38% (30th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2017-1000255?

Upgrade linux on debian 11 to 4.13.4-2 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2017-1000255

MEDIUM

5.5

CVSS v3

NVD

Description

On Linux running on PowerPC hardware (Power8 or later) a user process can craft a signal frame and then do a sigreturn so that the kernel will take an exception (interrupt), and use the r1 value *from the signal frame* as the kernel stack pointer. As part of the exception entry the content of the signal frame is written to the kernel stack, allowing an attacker to overwrite arbitrary locations with arbitrary values. The exception handling does produce an oops, and a panic if panic_on_oops=1, but only after kernel memory has been over written. This flaw was introduced in commit: "5d176f751ee3 (powerpc: tm: Enable transactional memory (TM) lazily for userspace)" which was merged upstream into v4.9-rc1. Please note that kernels built with CONFIG_PPC_TRANSACTIONAL_MEM=n are not vulnerable.

CWE-787Out-of-bounds Write

How to fix

Remediation Available

linuxDebian

Fixed in:4.13.4-2CVE-2017-1000255

linux-hweUbuntu

Fixed in:4.10.0-37.41~16.04.1USN-3443-2

linux-image-4.10.0-37-genericUbuntu

Fixed in:4.10.0-37.41~16.04.1USN-3443-2

linux-image-4.10.0-37-generic-lpaeUbuntu

Fixed in:4.10.0-37.41~16.04.1USN-3443-2

linux-image-4.10.0-37-lowlatencyUbuntu

Fixed in:4.10.0-37.41~16.04.1USN-3443-2

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 VectorLocal

Attack ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityNone

IntegrityHigh

AvailabilityNone

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Exploit Intelligence

0.38%probability of exploitation in 30 days

30thpercentile

Low risk: more likely to be exploited than 30% of all known CVEs.

References

Third-Party Advisory2

Other references1

access.redhat.com

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 2026-05-13.