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Fencer Intel
high 8.4

CVE-2021-38991 json

IBM AIX 7.0, 7.1, 7.2, and VIOS 3.1 could allow a non-privileged local user to exploit a vulnerability in the lscore command which could le…

published 4y ago modified 4mo ago also EUVD-2021-25428

cvss
8.4
version 3.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 20%
public exploits
0
none known

Summary

IBM AIX 7.0, 7.1, 7.2, and VIOS 3.1 could allow a non-privileged local user to exploit a vulnerability in the lscore command which could lead to code execution. IBM X-Force ID: 212953.

Patch / fix

Is CVE-2021-38991 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Exploit prediction

0.28% chance of exploitation in the next 30 days, higher than 20% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 3.0 8.4 CVSS:3.0/PR:N/A:H/S:U/AV:L/C:H/I:H/UI:N/AC:L/RC:C/RL:O/E:U
NVD 3.1 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CNA 3.0 8.4 CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 4.6 AV:L/AC:L/Au:N/C:P/I:P/A:P

Affected products

  • IBM AIX
  • IBM VIOS

References

Sources

Fencer Intel 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.