How severe is CVE-2018-17953?

CVE-2018-17953 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2018-17953 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-17953?

CVE-2018-17953 affects Kernel Linux-pam. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-17953?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2018-17953 published?

CVE-2018-17953 was published on 2018-11-27 and last updated on 2026-06-17.

CVE-2018-17953

CVE-2018-17953 is a high-severity vulnerability in Kernel Linux-pam with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-284.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 9.3
EPSS exploit prediction: 1% (68th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-284
Affected product: Kernel Linux-pam
Published: 2018-11-27
Last modified: 2026-06-17

Description

A incorrect variable in a SUSE specific patch for pam_access rule matching in PAM 1.3.0 in openSUSE Leap 15.0 and SUSE Linux Enterprise 15 could lead to pam_access rules not being applied (fail open).

Frequently asked questions

What is CVE-2018-17953?: A incorrect variable in a SUSE specific patch for pam_access rule matching in PAM 1.3.0 in openSUSE Leap 15.0 and SUSE Linux Enterprise 15 could lead to pam_access rules not being applied (fail open).
How severe is CVE-2018-17953?: CVE-2018-17953 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2018-17953 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (68th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-17953?: CVE-2018-17953 affects Kernel Linux-pam. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-17953?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2018-17953 published?: CVE-2018-17953 was published on 2018-11-27 and last updated on 2026-06-17.

References

https://bugzilla.suse.com/show_bug.cgi?id=1115640

Affected products (1)

cpe:2.3:a:kernel:linux-pam:1.3.0:*:*:*:*:*:*:*

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