vsock: prevent null-ptr-deref in vsock_*[has_data|has_space]

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-21666
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-01-31 12:15:27 UTC
Updated2026-05-12 13:16:31 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: vsock: prevent null-ptr-deref in vsock_*[has_data|has_space] Recent reports have shown how we sometimes call vsock_*_has_data() when a vsock socket has been de-assigned from a transport (see attached links), but we shouldn't. Previous commits should have solved the real problems, but we may have more in the future, so to avoid null-ptr-deref, we can return 0 (no space, no data available) but with a warning. This way the code should continue to run in a nearly consistent state and have a warning that allows us to debug future problems.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

Problem Types: CWE-476 | CWE-476 CWE-476 NULL Pointer Dereference

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1ADPDECLARED5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c0cfa2d8a788fcf45df5bf4070ab2474c88d543a daeac89cdb03d30028186f5ff7dc26ec8fa843e7 git Not specified
CNA Linux Linux affected c0cfa2d8a788fcf45df5bf4070ab2474c88d543a 9e5fed46ccd2c34c5fa5a9c8825ce4823fdc853e git Not specified
CNA Linux Linux affected c0cfa2d8a788fcf45df5bf4070ab2474c88d543a b52e50dd4fabd12944172bd486a4f4853b7f74dd git Not specified
CNA Linux Linux affected c0cfa2d8a788fcf45df5bf4070ab2474c88d543a bc9c49341f9728c31fe248c5fbba32d2e81a092b git Not specified
CNA Linux Linux affected c0cfa2d8a788fcf45df5bf4070ab2474c88d543a c23d1d4f8efefb72258e9cedce29de10d057f8ca git Not specified
CNA Linux Linux affected c0cfa2d8a788fcf45df5bf4070ab2474c88d543a 91751e248256efc111e52e15115840c35d85abaf git Not specified
CNA Linux Linux affected 5.5 Not specified
CNA Linux Linux unaffected 5.5 semver Not specified
CNA Linux Linux unaffected 5.10.234 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.177 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.127 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.74 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.11 6.12.* semver Not specified
CNA Linux Linux unaffected 6.13 * original_commit_for_fix Not specified
ADP Siemens SIMATIC S7-1500 TM MFP - GNU/Linux Subsystem affected * custom Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/9e5fed46ccd2c34c5fa5a9c8825ce4823fdc853e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/03/msg00002.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
git.kernel.org/stable/c/91751e248256efc111e52e15115840c35d85abaf 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-265688.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/daeac89cdb03d30028186f5ff7dc26ec8fa843e7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/03/msg00001.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org
git.kernel.org/stable/c/b52e50dd4fabd12944172bd486a4f4853b7f74dd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/bc9c49341f9728c31fe248c5fbba32d2e81a092b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/c23d1d4f8efefb72258e9cedce29de10d057f8ca 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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