01 Record

CVE-2021-47511

ALSA: pcm: oss: Fix negative period/buffer sizes

MediumPUBLISHEDCNA: Linux

CNA base score5.5 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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02 Description

ALSA: pcm: oss: Fix negative period/buffer sizes

03 Exploitation and scoring

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.24% probability of exploitation activity in the next 30 days.

EPSS percentile

Ranks above 15.2% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

NVD analysis status

Analyzed. NVD last modified this record on 2026-06-17.

Red Hat severity

Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2024-05-24 15:09Z2 YR AGO

Last updated

2026-05-11 13:56Z3 MO AGO

Reserved

2024-05-24

Assigning CNA

Linux

Record state

PUBLISHED

Severity

Medium (CVSS 5.5)

CNA CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weaknesses

CWE-839Numeric Range Comparison Without Minimum CheckBase

Data version

5.2

Document digest

25e96283c3331f227c4093b995433213292386485f3c316139b5cce930fdecf7

05 Affected products

VendorProductVersionsPlatforms

LinuxLinux1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < be8869d388593e57223ad39297c8e54be632f2f2, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 502e1146873d870f87da3b8f93d6bf2de5f38d0c, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 8af815ab052eaf74addbbfb556d63ce2137c0e1b, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < f96c0959c1ee92adc911c10d6ec209af50105049, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < f12c8a7515f641885677960af450082569a87243, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 02b2b691b77cd7b951fa7b6c9d44d4e472cdc823, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 00a860678098fcd9fa8db2b5fb9d2ddf4776d4cc, 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 to < 9d2479c960875ca1239bcb899f386970c13d9cfe, 2.6.12—

06 References

git.kernel.orghttps://git.kernel.org/stable/c/be8869d388593e57223ad39297c8e54be632f2f2
git.kernel.orghttps://git.kernel.org/stable/c/502e1146873d870f87da3b8f93d6bf2de5f38d0c
git.kernel.orghttps://git.kernel.org/stable/c/8af815ab052eaf74addbbfb556d63ce2137c0e1b
git.kernel.orghttps://git.kernel.org/stable/c/f96c0959c1ee92adc911c10d6ec209af50105049
git.kernel.orghttps://git.kernel.org/stable/c/f12c8a7515f641885677960af450082569a87243
git.kernel.orghttps://git.kernel.org/stable/c/02b2b691b77cd7b951fa7b6c9d44d4e472cdc823
git.kernel.orghttps://git.kernel.org/stable/c/00a860678098fcd9fa8db2b5fb9d2ddf4776d4cc
git.kernel.orghttps://git.kernel.org/stable/c/9d2479c960875ca1239bcb899f386970c13d9cfe

01 Record index

CVE-2021-47511

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References

02 Records

CVE-2021-47511

02 Description

03 Exploitation and scoring

04 Metadata

05 Affected products

06 References