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.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00008.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Linux Linux unaffected
Version Status Constraints
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected
< be8869d388593e57223ad39297c8e54be632f2f2
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected
< 502e1146873d870f87da3b8f93d6bf2de5f38d0c
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected
< 8af815ab052eaf74addbbfb556d63ce2137c0e1b
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected
< f96c0959c1ee92adc911c10d6ec209af50105049
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected
< f12c8a7515f641885677960af450082569a87243
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected
< 02b2b691b77cd7b951fa7b6c9d44d4e472cdc823
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected
< 00a860678098fcd9fa8db2b5fb9d2ddf4776d4cc
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 affected
< 9d2479c960875ca1239bcb899f386970c13d9cfe
Linux Linux affected
Version Status Constraints
2.6.12 affected
—
0 unaffected
< 2.6.12
4.4.295 unaffected
≤ 4.4.*
4.9.293 unaffected
≤ 4.9.*
4.14.258 unaffected
≤ 4.14.*
4.19.221 unaffected
≤ 4.19.*
5.4.165 unaffected
≤ 5.4.*
5.10.85 unaffected
≤ 5.10.*
5.15.8 unaffected
≤ 5.15.*
5.16 unaffected
≤ *

Configuration 1 [-]

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:*

No data.

Vendor Product Confidence Versions
Linux Linux Kernel — —

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Advisories

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Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://git.kernel.org/stable/c/00a860678098fcd9fa8db2b5fb9d2ddf4776d4cc cve-icon cve-icon
https://git.kernel.org/stable/c/02b2b691b77cd7b951fa7b6c9d44d4e472cdc823 cve-icon cve-icon
https://git.kernel.org/stable/c/502e1146873d870f87da3b8f93d6bf2de5f38d0c cve-icon cve-icon
https://git.kernel.org/stable/c/8af815ab052eaf74addbbfb556d63ce2137c0e1b cve-icon cve-icon
https://git.kernel.org/stable/c/9d2479c960875ca1239bcb899f386970c13d9cfe cve-icon cve-icon
https://git.kernel.org/stable/c/be8869d388593e57223ad39297c8e54be632f2f2 cve-icon cve-icon
https://git.kernel.org/stable/c/f12c8a7515f641885677960af450082569a87243 cve-icon cve-icon
https://git.kernel.org/stable/c/f96c0959c1ee92adc911c10d6ec209af50105049 cve-icon cve-icon
https://lore.kernel.org/linux-cve-announce/2024052430-CVE-2021-47511-7bec@gregkh/T cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2021-47511 cve-icon
https://www.cve.org/CVERecord?id=CVE-2021-47511 cve-icon
History

Mon, 29 Sep 2025 17:15:00 +0000

Type Values Removed Values Added
Weaknesses NVD-CWE-noinfo
CPEs cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:5.16:rc4:*:*:*:*:*:*

Mon, 04 Nov 2024 21:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 4.7, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H'}

 cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}

Mon, 04 Nov 2024 12:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}
cve-icon MITRE

Status: PUBLISHED

Assigner: Linux

Published:

Updated: 2025-12-18T11:37:48.615Z

Reserved: 2024-05-24T15:02:54.823Z

Link: CVE-2021-47511

cve-icon Vulnrichment

Updated: 2024-08-04T05:39:59.645Z

cve-icon NVD

Status : Analyzed

Published: 2024-05-24T15:15:12.237

Modified: 2025-09-29T17:09:23.837

Link: CVE-2021-47511

cve-icon Redhat

Severity : Moderate

Publid Date: 2024-05-24T00:00:00Z

Links: CVE-2021-47511 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2025-07-12T22:31:36Z

Weaknesses