{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-53038", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.380Z", "datePublished": "2026-06-24T16:29:45.086Z", "dateUpdated": "2026-06-24T16:29:45.086Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-24T16:29:45.086Z" }, "descriptions": [ { "lang": "en", "value": "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": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "security/integrity/ima/ima_fs.c" ], "versions": [ { "version": "9fa8e76250082a45d0d3dad525419ab98bd01658", "lessThan": "081b557cb56e1cfa8d1619b2601b01c53e3f418c", "status": "affected", "versionType": "git" }, { "version": "9fa8e76250082a45d0d3dad525419ab98bd01658", "lessThan": "b6766b171a5c4c33b26ff6fec530cb798db1f75e", "status": "affected", "versionType": "git" }, { "version": "9fa8e76250082a45d0d3dad525419ab98bd01658", "lessThan": "88d4e89a39f0de07798ca3fd93bd1a9ea212a82e", "status": "affected", "versionType": "git" }, { "version": "9fa8e76250082a45d0d3dad525419ab98bd01658", "lessThan": "d7bd8cf0b348d3edae7bee33e74a32b21668b181", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "security/integrity/ima/ima_fs.c" ], "versions": [ { "version": "6.10", "status": "affected" }, { "version": "0", "lessThan": "6.10", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.91", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.33", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.10", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1", "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": "6.12.91" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.18.33" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "7.0.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "7.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/081b557cb56e1cfa8d1619b2601b01c53e3f418c" }, { "url": "https://git.kernel.org/stable/c/b6766b171a5c4c33b26ff6fec530cb798db1f75e" }, { "url": "https://git.kernel.org/stable/c/88d4e89a39f0de07798ca3fd93bd1a9ea212a82e" }, { "url": "https://git.kernel.org/stable/c/d7bd8cf0b348d3edae7bee33e74a32b21668b181" } ], "title": "ima_fs: Correctly create securityfs files for unsupported hash algos", "x_generator": { "engine": "bippy-1.2.0" } } } }