tpm2-sessions: Fix missing tpm_buf_destroy() in tpm2_read_public()

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-46096
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-27 14:17:31 UTC
Updated2026-06-25 21:17:06 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: tpm2-sessions: Fix missing tpm_buf_destroy() in tpm2_read_public() tpm2_read_public() calls tpm_buf_init() but fails to call tpm_buf_destroy() on two exit paths, leaking a page allocation: 1. When name_size() returns an error (unrecognized hash algorithm), the function returns directly without destroying the buffer. 2. On the success path, the buffer is never destroyed before returning. All other error paths in the function correctly call tpm_buf_destroy() before returning. Fix both by adding the missing tpm_buf_destroy() calls.

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

EPSS: 0.000170000 probability, percentile 0.042650000 (date 2026-06-01)

Problem Types: NVD-CWE-noinfo

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 20eda7c74b69fe9e1caf9b930a5c016bf8d755fa f8775d9d9062da662cc861f9ff7722a65896d4cd git Not specified
CNA Linux Linux affected bda1cbf73c6e241267c286427f2ed52b5735d872 2f434be87e256fd58254f60ddf5d7d58e775ca0b git Not specified
CNA Linux Linux affected bda1cbf73c6e241267c286427f2ed52b5735d872 f0f75a3d98b7959a8677b6363e23190f3018636b git Not specified
CNA Linux Linux affected a3b7eb67225c486a2da357c5db3e386f4e64bcde git Not specified
CNA Linux Linux affected 6.18.3 6.18.27 semver Not specified
CNA Linux Linux affected 6.12.64 6.13 semver Not specified
CNA Linux Linux affected 6.19 Not specified
CNA Linux Linux unaffected 6.19 semver Not specified
CNA Linux Linux unaffected 6.18.27 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.4 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/f0f75a3d98b7959a8677b6363e23190f3018636b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/f8775d9d9062da662cc861f9ff7722a65896d4cd 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/2f434be87e256fd58254f60ddf5d7d58e775ca0b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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