{"id":"CVE-2026-46283","state":"PUBLISHED","title":"tpm: Use kfree_sensitive() to free auth session in tpm_dev_release()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ntpm: Use kfree_sensitive() to free auth session in tpm_dev_release()\n\ntpm_dev_release() uses plain kfree() to free chip->auth, which contains\nsensitive cryptographic material including HMAC session keys, nonces,\nand passphrase data (struct tpm2_auth).\n\nEvery other code path that frees this structure uses kfree_sensitive()\nto zero the memory before releasing it: both tpm2_end_auth_session()\nand tpm_buf_check_hmac_response() do so. The tpm_dev_release() path\nis the only one that does not, leaving key material in freed slab\nmemory until it is eventually overwritten.\n\nUse kfree_sensitive() for consistency with the rest of the driver and\nto ensure session keys are scrubbed during device teardown.","publishedAt":"2026-06-08T15:41:26.425Z","updatedAt":"2026-06-14T18:06:13.398Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"699e3efd6c645c741ea4d6d58282c56b6d108cf7","status":"affected","lessThan":"dd3ac52ea7a001406c7dbc663aae4b9f89da679a","versionType":"git"},{"version":"699e3efd6c645c741ea4d6d58282c56b6d108cf7","status":"affected","lessThan":"53e6d2d834df40960b655b353e7a8ff4d927e1c7","versionType":"git"},{"version":"699e3efd6c645c741ea4d6d58282c56b6d108cf7","status":"affected","lessThan":"84ced03172da544c9f8c0862faad48104f519352","versionType":"git"},{"version":"699e3efd6c645c741ea4d6d58282c56b6d108cf7","status":"affected","lessThan":"c424d2664f08c77f08b4580b5f0cbaabf7c229b2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/char/tpm/tpm-chip.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.10","versionType":"semver"},{"version":"6.12.86","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.27","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.4","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/char/tpm/tpm-chip.c"]}],"references":["https://git.kernel.org/stable/c/dd3ac52ea7a001406c7dbc663aae4b9f89da679a","https://git.kernel.org/stable/c/53e6d2d834df40960b655b353e7a8ff4d927e1c7","https://git.kernel.org/stable/c/84ced03172da544c9f8c0862faad48104f519352","https://git.kernel.org/stable/c/c424d2664f08c77f08b4580b5f0cbaabf7c229b2"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/46xxx/CVE-2026-46283.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46283","state":"PUBLISHED","datePublished":"2026-06-08T15:41:26.425Z","dateUpdated":"2026-06-14T18:06:13.398Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.110Z"},"containers":{"cna":{"title":"tpm: Use kfree_sensitive() to free auth session in tpm_dev_release()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntpm: Use kfree_sensitive() to free auth session in tpm_dev_release()\n\ntpm_dev_release() uses plain kfree() to free chip->auth, which contains\nsensitive cryptographic material including HMAC session keys, nonces,\nand passphrase data (struct tpm2_auth).\n\nEvery other code path that frees this structure uses kfree_sensitive()\nto zero the memory before releasing it: both tpm2_end_auth_session()\nand tpm_buf_check_hmac_response() do so. The tpm_dev_release() path\nis the only one that does not, leaving key material in freed slab\nmemory until it is eventually overwritten.\n\nUse kfree_sensitive() for consistency with the rest of the driver and\nto ensure session keys are scrubbed during device teardown."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"699e3efd6c645c741ea4d6d58282c56b6d108cf7","status":"affected","lessThan":"dd3ac52ea7a001406c7dbc663aae4b9f89da679a","versionType":"git"},{"version":"699e3efd6c645c741ea4d6d58282c56b6d108cf7","status":"affected","lessThan":"53e6d2d834df40960b655b353e7a8ff4d927e1c7","versionType":"git"},{"version":"699e3efd6c645c741ea4d6d58282c56b6d108cf7","status":"affected","lessThan":"84ced03172da544c9f8c0862faad48104f519352","versionType":"git"},{"version":"699e3efd6c645c741ea4d6d58282c56b6d108cf7","status":"affected","lessThan":"c424d2664f08c77f08b4580b5f0cbaabf7c229b2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/char/tpm/tpm-chip.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.10","versionType":"semver"},{"version":"6.12.86","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.27","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.4","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/char/tpm/tpm-chip.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/dd3ac52ea7a001406c7dbc663aae4b9f89da679a"},{"url":"https://git.kernel.org/stable/c/53e6d2d834df40960b655b353e7a8ff4d927e1c7"},{"url":"https://git.kernel.org/stable/c/84ced03172da544c9f8c0862faad48104f519352"},{"url":"https://git.kernel.org/stable/c/c424d2664f08c77f08b4580b5f0cbaabf7c229b2"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-14T18:06:13.398Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"6.12.86"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"6.18.27"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"7.0.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}