{
"schemaVersion": 1,
"attribution": [
{
"source": "CISA Known Exploited Vulnerabilities",
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
"licence": "US government work"
},
{
"source": "GitHub Advisory Database",
"url": "https://github.com/advisories",
"licence": "CC BY 4.0"
},
{
"source": "Have I Been Pwned",
"url": "https://haveibeenpwned.com/",
"licence": "CC BY 4.0"
},
{
"source": "CVE Program (CVE records)",
"url": "https://www.cve.org/Legal/TermsOfUse",
"licence": "CVE Terms of Use",
"notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
"terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
},
{
"source": "FIRST EPSS",
"url": "https://www.first.org/epss/",
"licence": "free to use; FIRST requests attribution"
}
],
"record": {
"id": "CVE-2026-53038",
"sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-53038",
"idYear": 2026,
"status": "PUBLISHED",
"publishedAt": "2026-06-24T16:29:45.086Z",
"updatedAt": "2026-06-24T16:29:45.086Z",
"importedAt": "2026-10-24T01:58:14.884Z",
"snapshot": {
"id": "cve_2026-10-24_midnight_baseline",
"at": "2026-10-24T00:00:00.000Z",
"source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
},
"facts": {
"title": "ima_fs: Correctly create securityfs files for unsupported hash algos",
"summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nima_fs: Correctly create securityfs files for unsupported hash algos\n\nima_tpm_chip->allocated_banks[i].crypto_id is initialized to\nHASH_ALGO__LAST if the TPM algorithm is not supported. However there\nare places relying on the algorithm to be valid because it is accessed\nby hash_algo_name[].\n\nOn 6.12.40 I observe the following read out-of-bounds in hash_algo_name:\n ==================================================================\n BUG: KASAN: global-out-of-bounds in create_securityfs_measurement_lists+0x396/0x440\n Read of size 8 at addr ffffffff83e18138 by task swapper/0/1\n\n CPU: 4 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.12.40 #3\n Call Trace:\n \n dump_stack_lvl+0x61/0x90\n print_report+0xc4/0x580\n ? kasan_addr_to_slab+0x26/0x80\n ? create_securityfs_measurement_lists+0x396/0x440\n kasan_report+0xc2/0x100\n ? create_securityfs_measurement_lists+0x396/0x440\n create_securityfs_measurement_lists+0x396/0x440\n ima_fs_init+0xa3/0x300\n ima_init+0x7d/0xd0\n init_ima+0x28/0x100\n do_one_initcall+0xa6/0x3e0\n kernel_init_freeable+0x455/0x740\n kernel_init+0x24/0x1d0\n ret_from_fork+0x38/0x80\n ret_from_fork_asm+0x11/0x20\n \n\n The buggy address belongs to the variable:\n hash_algo_name+0xb8/0x420\n\n Memory state around the buggy address:\n ffffffff83e18000: 00 01 f9 f9 f9 f9 f9 f9 00 01 f9 f9 f9 f9 f9 f9\n ffffffff83e18080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00\n >ffffffff83e18100: 00 00 00 00 00 00 00 f9 f9 f9 f9 f9 00 05 f9 f9\n ^\n ffffffff83e18180: f9 f9 f9 f9 00 00 00 00 00 00 00 04 f9 f9 f9 f9\n ffffffff83e18200: 00 00 00 00 00 00 00 00 04 f9 f9 f9 f9 f9 f9 f9\n ==================================================================\n\nSeems like the TPM chip supports sha3_256, which isn't yet in\ntpm_algorithms:\n tpm tpm0: TPM with unsupported bank algorithm 0x0027\n\nThat's TPM_ALG_SHA3_256 == 0x0027 from \"Trusted Platform Module 2.0\nLibrary Part 2: Structures\", page 51 [1].\nSee also the related U-Boot algorithms update [2].\n\nThus solve the problem by creating a file name with \"_tpm_alg_\"\npostfix if the crypto algorithm isn't initialized.\n\nThis is how it looks on the test machine (patch ported to v6.12 release):\n # ls -1 /sys/kernel/security/ima/\n ascii_runtime_measurements\n ascii_runtime_measurements_tpm_alg_27\n ascii_runtime_measurements_sha1\n ascii_runtime_measurements_sha256\n binary_runtime_measurements\n binary_runtime_measurements_tpm_alg_27\n binary_runtime_measurements_sha1\n binary_runtime_measurements_sha256\n policy\n runtime_measurements_count\n violations\n\n[1]: https://trustedcomputinggroup.org/wp-content/uploads/Trusted-Platform-Module-2.0-Library-Part-2-Version-184_pub.pdf\n[2]: https://lists.denx.de/pipermail/u-boot/2024-July/558835.html",
"affected": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"versions": [
{
"version": "9fa8e76250082a45d0d3dad525419ab98bd01658",
"status": "affected",
"versionType": "git",
"lessThan": "081b557cb56e1cfa8d1619b2601b01c53e3f418c"
},
{
"version": "9fa8e76250082a45d0d3dad525419ab98bd01658",
"status": "affected",
"versionType": "git",
"lessThan": "b6766b171a5c4c33b26ff6fec530cb798db1f75e"
},
{
"version": "9fa8e76250082a45d0d3dad525419ab98bd01658",
"status": "affected",
"versionType": "git",
"lessThan": "88d4e89a39f0de07798ca3fd93bd1a9ea212a82e"
},
{
"version": "9fa8e76250082a45d0d3dad525419ab98bd01658",
"status": "affected",
"versionType": "git",
"lessThan": "d7bd8cf0b348d3edae7bee33e74a32b21668b181"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"versions": [
{
"version": "6.10",
"status": "affected"
},
{
"version": "0",
"status": "unaffected",
"versionType": "semver",
"lessThan": "6.10"
},
{
"version": "6.12.91",
"status": "unaffected",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"version": "6.18.33",
"status": "unaffected",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"version": "7.0.10",
"status": "unaffected",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"version": "7.1",
"status": "unaffected",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
]
}
]
}
}
}