{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-48632", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-25T13:44:28.315Z", "datePublished": "2024-04-28T12:59:10.481Z", "dateUpdated": "2026-08-05T08:51:34.167Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:51:34.167Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ni2c: mlxbf: prevent stack overflow in mlxbf_i2c_smbus_start_transaction()\n\nmemcpy() is called in a loop while 'operation->length' upper bound\nis not checked and 'data_idx' also increments." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The overflow is in the BlueField I2C master SMBus path (mlxbf_i2c_smbus_xfer → mlxbf_i2c_smbus_start_transaction), reached via local /dev/i2c-* I2C_SMBUS ioctls or in-kernel I2C clients on the DPU—not via network packets or physical bus injection.\nAC:L - An attacker who can issue SMBus transactions supplies the operation lengths and write buffers directly; no race, probabilistic memory layout, or other attacker-uncontrollable condition is required to exercise the unbounded memcpy into the stack buffer.\nPR:L - i2cdev_open() performs no capability check—access is only DAC on /dev/i2c-*. On BlueField management deployments, i2c group or otherwise relaxed device permissions are a realistic worst case, so a non-root local user can reach the path (higher severity than assuming root-only 0600).\nUI:N - The attacker triggers the vulnerable ioctl/transaction path themselves; no victim mount, file open, or other interactive action is required.\nS:U - Impact is ordinary in-kernel stack memory corruption on the BlueField host OS authority. The slave/IPMB path is separate and this is not a VM escape, IOMMU bypass, or host/DPU boundary cross.\nC:H - The bug is a stack buffer overflow via memcpy of attacker-controlled SMBus write data into a fixed 128-byte data_desc; such stack corruption is scored as enabling high confidentiality impact (info disclosure / read primitives) under the higher-severity rule.\nI:H - Attacker-controlled out-of-bounds stack writes can overwrite saved return addresses and adjacent stack state, yielding a control-flow/arbitrary-write primitive and Integrity High for this class of memory corruption.\nA:H - Corrupting the kernel stack in mlxbf_i2c_smbus_start_transaction reliably causes oops/panic or otherwise denies service, which is Availability High under kernel CVSS guidance." } ] } ], "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-mlxbf.c" ], "versions": [ { "version": "b5b5b32081cd206baa6e58cca7f112d9723785d6", "lessThan": "48ee0a864d1af02eea98fc825cc230d61517a71e", "status": "affected", "versionType": "git" }, { "version": "b5b5b32081cd206baa6e58cca7f112d9723785d6", "lessThan": "dc2a0c587006f29b724069740c48654b9dcaebd2", "status": "affected", "versionType": "git" }, { "version": "b5b5b32081cd206baa6e58cca7f112d9723785d6", "lessThan": "3b5ab5fbe69ebbee5692c72b05071a43fc0655d8", "status": "affected", "versionType": "git" }, { "version": "b5b5b32081cd206baa6e58cca7f112d9723785d6", "lessThan": "de24aceb07d426b6f1c59f33889d6a964770547b", "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/i2c/busses/i2c-mlxbf.c" ], "versions": [ { "version": "5.10", "status": "affected" }, { "version": "0", "lessThan": "5.10", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.146", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.71", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.19.12", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0", "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": "5.10", "versionEndExcluding": "5.10.146" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "5.15.71" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "5.19.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "6.0" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/48ee0a864d1af02eea98fc825cc230d61517a71e" }, { "url": "https://git.kernel.org/stable/c/dc2a0c587006f29b724069740c48654b9dcaebd2" }, { "url": "https://git.kernel.org/stable/c/3b5ab5fbe69ebbee5692c72b05071a43fc0655d8" }, { "url": "https://git.kernel.org/stable/c/de24aceb07d426b6f1c59f33889d6a964770547b" } ], "title": "i2c: mlxbf: prevent stack overflow in mlxbf_i2c_smbus_start_transaction()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T15:17:55.519Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/48ee0a864d1af02eea98fc825cc230d61517a71e", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/dc2a0c587006f29b724069740c48654b9dcaebd2", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/3b5ab5fbe69ebbee5692c72b05071a43fc0655d8", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/de24aceb07d426b6f1c59f33889d6a964770547b", "tags": [ "x_transferred" ] } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2022-48632", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T15:46:27.328258Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:12.457Z" } } ] } }