5.5

CVE-2018-21008: linux linux_kernel Use After Free

Modified
AliasesUBUNTU-CVE-2018-21008DEBIAN-CVE-2018-21008
Published 04-09-2019Last modified 05-08-2024

Vulnerability summary

CVE-2018-21008 is a medium (CVSS 5.5) Use After Free vulnerability in linux linux_kernel. EPSS estimates a 0.59% chance of exploitation in the next 30 days, higher than 48.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
5.5/10
010
Medium · v3.0 (NVD)
EPSS score
0.59%
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 18 · Related 16
DLA-1930-1DLA-2114-1OPENSUSE-SU-2019:2173-1OPENSUSE-SU-2019:2181-1SUSE-SU-2019:2412-1SUSE-SU-2019:2414-1

Timeline

  1. 04-09-2019
    PublishedVulnerability first disclosed.
  2. 05-08-2024
    Last modifiedVulnerability information updated.

Description

An issue was discovered in the Linux kernel before 4.16.7. A use-after-free can be caused by the function rsi_mac80211_detach in the file drivers/net/wireless/rsi/rsi_91x_mac80211.c.

CVSS metrics

5 scores · 3 sources · 3 versions

EPSS trend

Probability

0.59%

Chance of exploitation in the next 30 days

Percentile

48%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.59% 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.

Ubuntu23 products
  • linux< 4.4.0-166.195 | < 4.15.0-66.75
  • linux-aws< 4.4.0-1056.60 | < 4.4.0-1096.107 | < 4.15.0-1052.54
  • linux-aws-fips< 4.15.0-2018.18 | All versions (No fix recorded)
  • linux-aws-hwe< 4.15.0-1052.54~16.04.1
  • linux-azure< 4.15.0-1061.66~14.04.1 | < 4.15.0-1061.66 | < 4.18.0-1011.11~18.04.1
Debian1 product
  • linux< 4.18.6-1
Linux1 product

3 vendors · 25 products

References

20 links
Show all 20 references