{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2022-50394", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-09-17T14:53:06.998Z", "datePublished": "2025-09-18T13:33:12.992Z", "dateUpdated": "2026-05-11T19:18:41.200Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:18:41.200Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: ismt: Fix an out-of-bounds bug in ismt_access()\n\nWhen the driver does not check the data from the user, the variable\n'data->block[0]' may be very large to cause an out-of-bounds bug.\n\nThe following log can reveal it:\n\n[ 33.995542] i2c i2c-1: ioctl, cmd=0x720, arg=0x7ffcb3dc3a20\n[ 33.995978] ismt_smbus 0000:00:05.0: I2C_SMBUS_BLOCK_DATA: WRITE\n[ 33.996475] ==================================================================\n[ 33.996995] BUG: KASAN: out-of-bounds in ismt_access.cold+0x374/0x214b\n[ 33.997473] Read of size 18446744073709551615 at addr ffff88810efcfdb1 by task ismt_poc/485\n[ 33.999450] Call Trace:\n[ 34.001849] memcpy+0x20/0x60\n[ 34.002077] ismt_access.cold+0x374/0x214b\n[ 34.003382] __i2c_smbus_xfer+0x44f/0xfb0\n[ 34.004007] i2c_smbus_xfer+0x10a/0x390\n[ 34.004291] i2cdev_ioctl_smbus+0x2c8/0x710\n[ 34.005196] i2cdev_ioctl+0x5ec/0x74c\n\nFix this bug by checking the size of 'data->block[0]' first."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/i2c/busses/i2c-ismt.c"], "versions": [{"version": "13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9", "lessThan": "4a7bb1d93addb2f67e36fed00a53cb7f270d7b7a", "status": "affected", "versionType": "git"}, {"version": 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"https://git.kernel.org/stable/c/4a7bb1d93addb2f67e36fed00a53cb7f270d7b7a"}, {"url": "https://git.kernel.org/stable/c/03b7ef7a6c5ca1ff553470166b4919db88b810f6"}, {"url": "https://git.kernel.org/stable/c/bfe41d966c860a8ad4c735639d616da270c92735"}, {"url": "https://git.kernel.org/stable/c/cdcbae2c5003747ddfd14e29db9c1d5d7e7c44dd"}, {"url": "https://git.kernel.org/stable/c/9ac541a0898e8ec187a3fa7024b9701cffae6bf2"}, {"url": "https://git.kernel.org/stable/c/96c12fd0ec74641295e1c3c34dea3dce1b6c3422"}, {"url": "https://git.kernel.org/stable/c/a642469d464b2780a25a49b51ae56623c65eac34"}, {"url": "https://git.kernel.org/stable/c/233348a04becf133283f0076e20b317302de21d9"}, {"url": "https://git.kernel.org/stable/c/39244cc754829bf707dccd12e2ce37510f5b1f8d"}], "title": "i2c: ismt: Fix an out-of-bounds bug in ismt_access()", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "LOCAL", "baseSeverity": 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{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2022-50394", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-01-14T18:51:21.854586Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-125", "description": "CWE-125 Out-of-bounds Read"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-01-14T18:51:17.904Z"}}], "cna": {"title": "i2c: ismt: Fix an out-of-bounds bug in ismt_access()", "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9", "lessThan": "4a7bb1d93addb2f67e36fed00a53cb7f270d7b7a", "versionType": "git"}, {"status": "affected", "version": "13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9", "lessThan": "03b7ef7a6c5ca1ff553470166b4919db88b810f6", "versionType": "git"}, {"status": "affected", "version": "13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9", "lessThan": "bfe41d966c860a8ad4c735639d616da270c92735", "versionType": "git"}, {"status": "affected", "version": "13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9", "lessThan": "cdcbae2c5003747ddfd14e29db9c1d5d7e7c44dd", "versionType": "git"}, {"status": "affected", "version": "13f35ac14cd0a9a1c4f0034c4c40d0ae98844ce9", "lessThan": "9ac541a0898e8ec187a3fa7024b9701cffae6bf2", "versionType": "git"}, 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[{"url": "https://git.kernel.org/stable/c/4a7bb1d93addb2f67e36fed00a53cb7f270d7b7a"}, {"url": "https://git.kernel.org/stable/c/03b7ef7a6c5ca1ff553470166b4919db88b810f6"}, {"url": "https://git.kernel.org/stable/c/bfe41d966c860a8ad4c735639d616da270c92735"}, {"url": "https://git.kernel.org/stable/c/cdcbae2c5003747ddfd14e29db9c1d5d7e7c44dd"}, {"url": "https://git.kernel.org/stable/c/9ac541a0898e8ec187a3fa7024b9701cffae6bf2"}, {"url": "https://git.kernel.org/stable/c/96c12fd0ec74641295e1c3c34dea3dce1b6c3422"}, {"url": "https://git.kernel.org/stable/c/a642469d464b2780a25a49b51ae56623c65eac34"}, {"url": "https://git.kernel.org/stable/c/233348a04becf133283f0076e20b317302de21d9"}, {"url": "https://git.kernel.org/stable/c/39244cc754829bf707dccd12e2ce37510f5b1f8d"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: ismt: Fix an out-of-bounds bug in ismt_access()\n\nWhen the driver does not check the data from the user, the variable\n'data->block[0]' may be very large to cause an out-of-bounds bug.\n\nThe following log can reveal it:\n\n[ 33.995542] i2c i2c-1: ioctl, cmd=0x720, arg=0x7ffcb3dc3a20\n[ 33.995978] ismt_smbus 0000:00:05.0: I2C_SMBUS_BLOCK_DATA: WRITE\n[ 33.996475] ==================================================================\n[ 33.996995] BUG: KASAN: out-of-bounds in ismt_access.cold+0x374/0x214b\n[ 33.997473] Read of size 18446744073709551615 at addr ffff88810efcfdb1 by task ismt_poc/485\n[ 33.999450] Call Trace:\n[ 34.001849] memcpy+0x20/0x60\n[ 34.002077] ismt_access.cold+0x374/0x214b\n[ 34.003382] __i2c_smbus_xfer+0x44f/0xfb0\n[ 34.004007] i2c_smbus_xfer+0x10a/0x390\n[ 34.004291] i2cdev_ioctl_smbus+0x2c8/0x710\n[ 34.005196] i2cdev_ioctl+0x5ec/0x74c\n\nFix this bug by checking the size of 'data->block[0]' first."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.9.337", "versionStartIncluding": "3.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.14.303", "versionStartIncluding": "3.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "4.19.270", "versionStartIncluding": "3.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.229", "versionStartIncluding": "3.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.163", "versionStartIncluding": "3.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.86", "versionStartIncluding": "3.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.0.16", "versionStartIncluding": "3.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.1.2", "versionStartIncluding": "3.9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.2", "versionStartIncluding": "3.9"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:18:41.200Z"}}}, "cveMetadata": {"cveId": "CVE-2022-50394", "state": "PUBLISHED", "dateUpdated": "2026-05-11T19:18:41.200Z", "dateReserved": "2025-09-17T14:53:06.998Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2025-09-18T13:33:12.992Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "0E0273F2-224A-448F-92F6-D08F1E18B7CD", "versionEndExcluding": "4.9.337", "versionStartIncluding": "3.9", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "1E7450AD-4739-46F0-B81B-C02E7B35A97B", "versionEndExcluding": "4.14.303", "versionStartIncluding": "4.10", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "AE8904A3-99BE-4E49-9682-1F90A6373F4F", "versionEndExcluding": "4.19.270", "versionStartIncluding": "4.15", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "A0C0D95E-414A-445E-941B-3EF6A4D3A093", "versionEndExcluding": "5.4.229", "versionStartIncluding": "4.20", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "D05D31FC-BD74-4F9E-B1D8-9CED62BE6F65", "versionEndExcluding": "5.10.163", "versionStartIncluding": "5.5", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "47237296-55D1-4ED4-8075-D00FC85A61EE", "versionEndExcluding": "5.15.86", "versionStartIncluding": "5.11", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "C720A569-3D93-4D77-95F6-E2B3A3267D9F", "versionEndExcluding": "6.0.16", "versionStartIncluding": "5.16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "77239F4B-6BB2-4B9E-A654-36A52396116C", "versionEndExcluding": "6.1.2", "versionStartIncluding": "6.1", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: ismt: Fix an out-of-bounds bug in ismt_access()\n\nWhen the driver does not check the data from the user, the variable\n'data->block[0]' may be very large to cause an out-of-bounds bug.\n\nThe following log can reveal it:\n\n[ 33.995542] i2c i2c-1: ioctl, cmd=0x720, arg=0x7ffcb3dc3a20\n[ 33.995978] ismt_smbus 0000:00:05.0: I2C_SMBUS_BLOCK_DATA: WRITE\n[ 33.996475] ==================================================================\n[ 33.996995] BUG: KASAN: out-of-bounds in ismt_access.cold+0x374/0x214b\n[ 33.997473] Read of size 18446744073709551615 at addr ffff88810efcfdb1 by task ismt_poc/485\n[ 33.999450] Call Trace:\n[ 34.001849] memcpy+0x20/0x60\n[ 34.002077] ismt_access.cold+0x374/0x214b\n[ 34.003382] __i2c_smbus_xfer+0x44f/0xfb0\n[ 34.004007] i2c_smbus_xfer+0x10a/0x390\n[ 34.004291] i2cdev_ioctl_smbus+0x2c8/0x710\n[ 34.005196] i2cdev_ioctl+0x5ec/0x74c\n\nFix this bug by checking the size of 'data->block[0]' first."}], "id": "CVE-2022-50394", "lastModified": "2026-01-14T19:16:14.790", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2025-09-18T14:15:38.490", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/03b7ef7a6c5ca1ff553470166b4919db88b810f6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/233348a04becf133283f0076e20b317302de21d9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/39244cc754829bf707dccd12e2ce37510f5b1f8d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/4a7bb1d93addb2f67e36fed00a53cb7f270d7b7a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/96c12fd0ec74641295e1c3c34dea3dce1b6c3422"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9ac541a0898e8ec187a3fa7024b9701cffae6bf2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a642469d464b2780a25a49b51ae56623c65eac34"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/bfe41d966c860a8ad4c735639d616da270c92735"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/cdcbae2c5003747ddfd14e29db9c1d5d7e7c44dd"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-125"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: i2c: ismt: Fix an out-of-bounds bug in ismt_access()", "id": "2396414", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2396414"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "details": ["No description is available for this CVE."], "name": "CVE-2022-50394", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Under investigation", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-09-18T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2022-50394\nhttps://nvd.nist.gov/vuln/detail/CVE-2022-50394\nhttps://lore.kernel.org/linux-cve-announce/2025091853-CVE-2022-50394-fcaa@gregkh/T"], "threat_severity": "Important"}

{"created": "2025-09-19T09:36:52.550882+00:00", "updated": "2025-09-19T09:36:52.550935+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}