{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49643", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T02:21:30.431Z", "datePublished": "2025-02-26T02:23:49.658Z", "dateUpdated": "2026-08-05T08:55:52.938Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:55:52.938Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nima: Fix a potential integer overflow in ima_appraise_measurement\n\nWhen the ima-modsig is enabled, the rc passed to evm_verifyxattr() may be\nnegative, which may cause the integer overflow problem." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable path is reached only through local IMA hooks (exec, open/mmap, module/firmware read) in process_measurement → ima_appraise_measurement, not via network packet processing.\nAC:L - On a system with ima-modsig appraisal enabled, an attacker can reliably craft a modsig-bearing file and drive the negative-xattr_len path (including a self-controlled getxattr TOCTOU that leaves a non-NULL buffer), with no dependency on victim-only state.\nPR:L - An unprivileged local user can trigger IMA appraisal of files they control when policy uses appraise_type=imasig|modsig; CAP_SYS_ADMIN is not required to reach the buggy call.\nUI:N - Exploitation does not require a separate user to perform an action; the attacker triggers appraisal themselves via open/exec of their crafted file.\nS:U - Impact stays within the kernel’s integrity/IMA authority; this is not a VM escape, IOMMU bypass, or other cross-boundary break.\nC:H - When the oversized length reaches crypto_shash_update with a non-NULL xattr buffer, the kernel performs an unbounded out-of-bounds read over adjacent memory, which per scoring guidance is Confidentiality High.\nI:N - The misuse is an out-of-bounds read into a hash comparison; it does not provide a write primitive or control-flow hijack, and a failed EVM HMAC takes the fail-closed INTEGRITY_FAIL path.\nA:H - The multi-gigabyte OOB read through crypto_shash_update reliably faults into unmapped memory and causes a kernel oops/panic, fully denying availability." } ] } ], "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_appraise.c" ], "versions": [ { "version": "39b07096364a42c516415d5f841069e885234e61", "lessThan": "388f3df7c3c8b7f2a32b9ae0a9b2f9f6ad3b1b77", "status": "affected", "versionType": "git" }, { "version": "39b07096364a42c516415d5f841069e885234e61", "lessThan": "831e190175f10652be93b08436cc7bf2e62e4bb6", "status": "affected", "versionType": "git" }, { "version": "39b07096364a42c516415d5f841069e885234e61", "lessThan": "c8d5d81940938b5f6c0f495ca9538e7740416f30", "status": "affected", "versionType": "git" }, { "version": "39b07096364a42c516415d5f841069e885234e61", "lessThan": "640cea4c2839a821adfbb703b590a5928abe9286", "status": "affected", "versionType": "git" }, { "version": "39b07096364a42c516415d5f841069e885234e61", "lessThan": "d2ee2cfc4aa85ff6a2a3b198a3a524ec54e3d999", "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_appraise.c" ], "versions": [ { "version": "5.4", "status": "affected" }, { "version": "0", "lessThan": "5.4", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.207", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.132", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.56", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.18.13", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.19", "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": "5.4", "versionEndExcluding": "5.4.207" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.10.132" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.15.56" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.18.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.19" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/388f3df7c3c8b7f2a32b9ae0a9b2f9f6ad3b1b77" }, { "url": "https://git.kernel.org/stable/c/831e190175f10652be93b08436cc7bf2e62e4bb6" }, { "url": "https://git.kernel.org/stable/c/c8d5d81940938b5f6c0f495ca9538e7740416f30" }, { "url": "https://git.kernel.org/stable/c/640cea4c2839a821adfbb703b590a5928abe9286" }, { "url": "https://git.kernel.org/stable/c/d2ee2cfc4aa85ff6a2a3b198a3a524ec54e3d999" } ], "title": "ima: Fix a potential integer overflow in ima_appraise_measurement", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2022-49643", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2025-10-01T19:33:55.240399Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-190", "description": "CWE-190 Integer Overflow or Wraparound" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T19:36:48.850Z" } } ] } }