{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98728","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-25T10:25:14.366Z","datePublished":"2026-10-18T15:47:05.722Z","dateUpdated":"2026-10-19T09:24:38.853Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-10-19T09:24:38.853Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ntpm: fix off-by-four bounds check in tpm2_get_random()\n\nWhen the response carries the TPM2_ST_SESSIONS tag, tpm2_get_random()\nskips the 4-byte parameter size field before locating the random data,\nbut the bounds check still validates the response length against\nTPM_HEADER_SIZE.  A truncated response can pass the check and make\nmemcpy() read up to 4 bytes past the response end, so stale buffer\ncontents end up in the caller's random bytes.\n\nFix this by checking the response length against 'offset', which\nalready includes the skipped parameter size field."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/char/tpm/tpm2-cmd.c"],"versions":[{"version":"1b6d7f9eb150305dcb0da4f7101a8d30dcdf0497","lessThan":"be54101992c2c5218be0e0a87827ccc96e3089af","status":"affected","versionType":"git"},{"version":"1b6d7f9eb150305dcb0da4f7101a8d30dcdf0497","lessThan":"e30a2406408d2df6d9cd48c2e59e913cf266a05a","status":"affected","versionType":"git"},{"version":"1b6d7f9eb150305dcb0da4f7101a8d30dcdf0497","lessThan":"42bb6216b861e892512128219ff23010d656ba14","status":"affected","versionType":"git"},{"version":"1b6d7f9eb150305dcb0da4f7101a8d30dcdf0497","lessThan":"9b522400bf5c082feb9a0037a053ea822a2c7e4d","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/char/tpm/tpm2-cmd.c"],"versions":[{"version":"6.10","status":"affected"},{"version":"0","lessThan":"6.10","status":"unaffected","versionType":"semver"},{"version":"6.12.113","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.56","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.10","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"6.12.113"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"6.18.56"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"7.2.10"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"7.3"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/be54101992c2c5218be0e0a87827ccc96e3089af"},{"url":"https://git.kernel.org/stable/c/e30a2406408d2df6d9cd48c2e59e913cf266a05a"},{"url":"https://git.kernel.org/stable/c/42bb6216b861e892512128219ff23010d656ba14"},{"url":"https://git.kernel.org/stable/c/9b522400bf5c082feb9a0037a053ea822a2c7e4d"}],"title":"tpm: fix off-by-four bounds check in tpm2_get_random()","x_generator":{"engine":"bippy-1.2.0"}}}}