5.5

CVE-2021-47511: linux

CVSS: 5.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2021-47511DEBIAN-CVE-2021-47511
Published 24-05-2024Last modified 11-05-2026
Open JSON

Vulnerability summary

CVE-2021-47511 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 14% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)
EPSS score
0.24%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 15 · Related 15
SUSE-SU-2024:1978-1SUSE-SU-2024:1979-1SUSE-SU-2024:1983-1SUSE-SU-2024:2008-1SUSE-SU-2024:2010-1SUSE-SU-2024:2011-1

Timeline

  1. 24-05-2024
    PublishedVulnerability first disclosed.
  2. 11-05-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: ALSA: pcm: oss: Fix negative period/buffer sizes The period size calculation in OSS layer may receive a negative value as an error, but the code there assumes only the positive values and handle them with size_t. Due to that, a too big value may be passed to the lower layers. This patch changes the code to handle with ssize_t and adds the proper error checks appropriately.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.24%

Chance of exploitation in the next 30 days

Percentile

14%

Versus all other CVEs

30-day change

0.00 pp

From 0.24% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.24%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu89 products
  • linuxAll versions (No fix recorded) | < 4.15.0-169.177 | < 5.4.0-100.113
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 4.15.0-1121.129 | < 5.4.0-1066.69
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < be8869d388593e57223ad39297c8e54be632f2f2 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 502e1146873d870f87da3b8f93d6bf2de5f38d0c | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 8af815ab052eaf74addbbfb556d63ce2137c0e1b | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < f96c0959c1ee92adc911c10d6ec209af50105049 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < f12c8a7515f641885677960af450082569a87243 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 02b2b691b77cd7b951fa7b6c9d44d4e472cdc823 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 00a860678098fcd9fa8db2b5fb9d2ddf4776d4cc | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 9d2479c960875ca1239bcb899f386970c13d9cfe | 2.6.12
  • linux_kernel< 4.4.295 | ≥ 4.5, < 4.9.293 | ≥ 4.10, < 4.14.258 | ≥ 4.15, < 4.19.221 | ≥ 4.20, < 5.4.165 | ≥ 5.5, < 5.10.85 | ≥ 5.11, < 5.15.8 | 5.16:rc1 | 5.16:rc2 | 5.16:rc3 | 5.16:rc4
Debian1 product
  • linux< 5.15.15-1

3 vendors · 92 products

References

12 links
Show all 12 references