apparmor: Fix double free of ns_name in aa_replace_profiles()

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Summary

CVECVE-2026-23408
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-01 09:16:16 UTC
Updated2026-04-18 09:16:25 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: apparmor: Fix double free of ns_name in aa_replace_profiles() if ns_name is NULL after 1071 error = aa_unpack(udata, &lh, &ns_name); and if ent->ns_name contains an ns_name in 1089 } else if (ent->ns_name) { then ns_name is assigned the ent->ns_name 1095 ns_name = ent->ns_name; however ent->ns_name is freed at 1262 aa_load_ent_free(ent); and then again when freeing ns_name at 1270 kfree(ns_name); Fix this by NULLing out ent->ns_name after it is transferred to ns_name ")

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.000130000 probability, percentile 0.023950000 (date 2026-04-21)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 145a0ef21c8e944957f58e2c8ffcd8a10f46266a c6347a2116ecccb8fd9ee4ebc75ae41d1d7ef689 git Not specified
CNA Linux Linux affected 145a0ef21c8e944957f58e2c8ffcd8a10f46266a c053ae381ce227577567d1ef10090ce7506d7a28 git Not specified
CNA Linux Linux affected 145a0ef21c8e944957f58e2c8ffcd8a10f46266a 35f4caec1352054b9a61cfdf2bf1898073637aa0 git Not specified
CNA Linux Linux affected 145a0ef21c8e944957f58e2c8ffcd8a10f46266a 55ef2af7490aaf72f8ffe11ec44c6bcb7eb2162a git Not specified
CNA Linux Linux affected 145a0ef21c8e944957f58e2c8ffcd8a10f46266a 86feeccd6b93ed94bd6655f30de80f163f8d5a45 git Not specified
CNA Linux Linux affected 145a0ef21c8e944957f58e2c8ffcd8a10f46266a 7998ab3010d2317643f91828f1853d954ef31387 git Not specified
CNA Linux Linux affected 145a0ef21c8e944957f58e2c8ffcd8a10f46266a 18b5233e860c294a847ee07869d93c0b8673a54b git Not specified
CNA Linux Linux affected 145a0ef21c8e944957f58e2c8ffcd8a10f46266a 5df0c44e8f5f619d3beb871207aded7c78414502 git Not specified
CNA Linux Linux affected 5.5 Not specified
CNA Linux Linux unaffected 5.5 semver Not specified
CNA Linux Linux unaffected 5.10.253 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.203 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.169 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.130 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.77 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.18 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.8 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/55ef2af7490aaf72f8ffe11ec44c6bcb7eb2162a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7998ab3010d2317643f91828f1853d954ef31387 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/86feeccd6b93ed94bd6655f30de80f163f8d5a45 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/18b5233e860c294a847ee07869d93c0b8673a54b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c053ae381ce227577567d1ef10090ce7506d7a28 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/5df0c44e8f5f619d3beb871207aded7c78414502 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c6347a2116ecccb8fd9ee4ebc75ae41d1d7ef689 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/35f4caec1352054b9a61cfdf2bf1898073637aa0 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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