3.3

CVE-2017-17807: linux linux_kernel Missing Authorization

Modified
AliasesUBUNTU-CVE-2017-17807DEBIAN-CVE-2017-17807
Published 20-12-2017Last modified 05-08-2024

Vulnerability summary

CVE-2017-17807 is a low (CVSS 3.3) Missing Authorization vulnerability in linux linux_kernel. EPSS estimates a 0.44% chance of exploitation in the next 30 days, higher than 38% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 3.3, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
3.3/10
010
Low · v3.0 (NVD)
EPSS score
0.44%
0%100%
Low · 0.00 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 10 · Related 5
DLA-1232-1DSA-4073-1DSA-4082-1RHSA-2020:1016RHSA-2020:1070USN-3617-2

Timeline

  1. 20-12-2017
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

The KEYS subsystem in the Linux kernel before 4.14.6 omitted an access-control check when adding a key to the current task's "default request-key keyring" via the request_key() system call, allowing a local user to use a sequence of crafted system calls to add keys to a keyring with only Search permission (not Write permission) to that keyring, related to construct_get_dest_keyring() in security/keys/request_key.c.

CVSS metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.44%

Chance of exploitation in the next 30 days

Percentile

38%

Versus all other CVEs

30-day change

No change 0.00 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

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu17 products
  • linux< 3.13.0-144.193 | < 4.4.0-119.143
  • linux-aws< 4.4.0-1016.16 | < 4.4.0-1054.63
  • linux-azure< 4.13.0-1014.17
  • linux-azure-fdeAll versions (No fix recorded)
  • linux-fips< 4.4.0-1008.10
Debian1 product
  • linux< 4.14.7-1
Linux1 product

3 vendors · 19 products

References

26 links
Show all 26 references