CVE-2021-47095

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This\ncauses following kernel crash if an error path is taken:\n\n[ 30.645593][ T674] ipmi_ssif 0-000e: ipmi_ssif: Not probing, Interface already present\n[ 30.657616][ T674] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000088\n...\n[ 30.657723][ T674] pc : __dev_printk+0x28/0xa0\n[ 30.657732][ T674] lr : _dev_err+0x7c/0xa0\n...\n[ 30.657772][ T674] Call trace:\n[ 30.657775][ T674] __dev_printk+0x28/0xa0\n[ 30.657778][ T674] _dev_err+0x7c/0xa0\n[ 30.657781][ T674] ssif_probe+0x548/0x900 [ipmi_ssif 62ce4b08badc1458fd896206d9ef69a3c31f3d3e]\n[ 30.657791][ T674] i2c_device_probe+0x37c/0x3c0\n...\n\nInitialize ssif_info->client before any error path can be taken. Clear\ni2c_client data in the error path to prevent the dangling pointer from\nleaking."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/char/ipmi/ipmi_ssif.c"], "versions": [{"version": "c4436c9149c5d2bc0c49ab57ec85c75ea1c4d61c", "lessThan": "8efd6a3391f7b0b19fb0c38e50add06ca30c94af", "status": "affected", "versionType": "git"}, {"version": "c4436c9149c5d2bc0c49ab57ec85c75ea1c4d61c", "lessThan": "1f6ab847461ce7dd89ae9db2dd4658c993355d7c", "status": "affected", "versionType": "git"}, {"version": "c4436c9149c5d2bc0c49ab57ec85c75ea1c4d61c", "lessThan": "77a7311ca167aa5b7055c549a940a56e73ee5f29", "status": "affected", "versionType": "git"}, {"version": "c4436c9149c5d2bc0c49ab57ec85c75ea1c4d61c", "lessThan": "34f35f8f14bc406efc06ee4ff73202c6fd245d15", "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/char/ipmi/ipmi_ssif.c"], "versions": [{"version": "5.4", "status": "affected"}, {"version": "0", "lessThan": "5.4", "status": "unaffected", "versionType": "semver"}, {"version": "5.4.169", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.89", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.12", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.16", "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": "5.4.169"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.10.89"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.15.12"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4", "versionEndExcluding": "5.16"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/8efd6a3391f7b0b19fb0c38e50add06ca30c94af"}, {"url": "https://git.kernel.org/stable/c/1f6ab847461ce7dd89ae9db2dd4658c993355d7c"}, {"url": "https://git.kernel.org/stable/c/77a7311ca167aa5b7055c549a940a56e73ee5f29"}, {"url": "https://git.kernel.org/stable/c/34f35f8f14bc406efc06ee4ff73202c6fd245d15"}], "title": "ipmi: ssif: initialize ssif_info->client early", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2021-47095", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-03-04T20:32:21.801460Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-07-05T17:22:07.482Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T05:24:39.950Z"}, "title": "CVE Program Container", "references": [{"url": "https://git.kernel.org/stable/c/8efd6a3391f7b0b19fb0c38e50add06ca30c94af", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/1f6ab847461ce7dd89ae9db2dd4658c993355d7c", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/77a7311ca167aa5b7055c549a940a56e73ee5f29", "tags": ["x_transferred"]}, {"url": "https://git.kernel.org/stable/c/34f35f8f14bc406efc06ee4ff73202c6fd245d15", "tags": ["x_transferred"]}]}]}}

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However,\nit is set when some of the error checking has already been done. This\ncauses following kernel crash if an error path is taken:\n\n[ 30.645593][ T674] ipmi_ssif 0-000e: ipmi_ssif: Not probing, Interface already present\n[ 30.657616][ T674] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000088\n...\n[ 30.657723][ T674] pc : __dev_printk+0x28/0xa0\n[ 30.657732][ T674] lr : _dev_err+0x7c/0xa0\n...\n[ 30.657772][ T674] Call trace:\n[ 30.657775][ T674] __dev_printk+0x28/0xa0\n[ 30.657778][ T674] _dev_err+0x7c/0xa0\n[ 30.657781][ T674] ssif_probe+0x548/0x900 [ipmi_ssif 62ce4b08badc1458fd896206d9ef69a3c31f3d3e]\n[ 30.657791][ T674] i2c_device_probe+0x37c/0x3c0\n...\n\nInitialize ssif_info->client before any error path can be taken. Clear\ni2c_client data in the error path to prevent the dangling pointer from\nleaking."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.4.169", "versionStartIncluding": "5.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.10.89", "versionStartIncluding": "5.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.15.12", "versionStartIncluding": "5.4"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "5.16", "versionStartIncluding": "5.4"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T13:47:56.919Z"}}}, "cveMetadata": {"cveId": "CVE-2021-47095", "state": "PUBLISHED", "dateUpdated": "2026-05-11T13:47:56.919Z", "dateReserved": "2024-02-29T22:33:44.300Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2024-03-04T18:10:46.553Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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However,\nit is set when some of the error checking has already been done. This\ncauses following kernel crash if an error path is taken:\n\n[ 30.645593][ T674] ipmi_ssif 0-000e: ipmi_ssif: Not probing, Interface already present\n[ 30.657616][ T674] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000088\n...\n[ 30.657723][ T674] pc : __dev_printk+0x28/0xa0\n[ 30.657732][ T674] lr : _dev_err+0x7c/0xa0\n...\n[ 30.657772][ T674] Call trace:\n[ 30.657775][ T674] __dev_printk+0x28/0xa0\n[ 30.657778][ T674] _dev_err+0x7c/0xa0\n[ 30.657781][ T674] ssif_probe+0x548/0x900 [ipmi_ssif 62ce4b08badc1458fd896206d9ef69a3c31f3d3e]\n[ 30.657791][ T674] i2c_device_probe+0x37c/0x3c0\n...\n\nInitialize ssif_info->client before any error path can be taken. Clear\ni2c_client data in the error path to prevent the dangling pointer from\nleaking."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: ipmi: ssif: inicializa ssif_info->client temprano Durante la sonda, ssif_info->client se desreferencia en la ruta de error. Sin embargo, se establece cuando ya se ha realizado parte de la verificaci\u00f3n de errores. Esto provoca el siguiente fallo del kernel si se toma una ruta de error: [30.645593][ T674] ipmi_ssif 0-000e: ipmi_ssif: No sondeando, la interfaz ya est\u00e1 presente [30.657616][ T674] No se puede manejar la desreferencia del puntero NULL del kernel en la direcci\u00f3n virtual 0000000000000088. [ 30.657723][ T674] pc : __dev_printk+0x28/0xa0 [ 30.657732][ T674] lr : _dev_err+0x7c/0xa0 ... [ 30.657772][ T674] Rastreo de llamadas: [ 30.657775][ T674] __dev_printk+0x28/0 xa0 [ 30.657778][ T674] _dev_err+0x7c/0xa0 [ 30.657781][ T674] ssif_probe+0x548/0x900 [ipmi_ssif 62ce4b08badc1458fd896206d9ef69a3c31f3d3e] [ 30.65779 1][T674] i2c_device_probe+0x37c/0x3c0... Inicialice ssif_info->client antes de que pueda aparecer cualquier ruta de error. ser tomado. Borre los datos de i2c_client en la ruta del error para evitar que se filtre el puntero colgante."}], "id": "CVE-2021-47095", "lastModified": "2026-06-17T04:16:27.773", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-47095", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-03-04T20:32:21.801460Z", "version": "2.0.3"}}]}, "published": "2024-03-04T18:15:07.907", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1f6ab847461ce7dd89ae9db2dd4658c993355d7c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/34f35f8f14bc406efc06ee4ff73202c6fd245d15"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/77a7311ca167aa5b7055c549a940a56e73ee5f29"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8efd6a3391f7b0b19fb0c38e50add06ca30c94af"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1f6ab847461ce7dd89ae9db2dd4658c993355d7c"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/34f35f8f14bc406efc06ee4ff73202c6fd245d15"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/77a7311ca167aa5b7055c549a940a56e73ee5f29"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8efd6a3391f7b0b19fb0c38e50add06ca30c94af"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: ipmi: ssif: initialize ssif_info->client early", "id": "2267928", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2267928"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:H", "status": "draft"}, "cwe": "CWE-402", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nipmi: ssif: initialize ssif_info->client early\nDuring probe ssif_info->client is dereferenced in error path. However,\nit is set when some of the error checking has already been done. This\ncauses following kernel crash if an error path is taken:\n[ 30.645593][ T674] ipmi_ssif 0-000e: ipmi_ssif: Not probing, Interface already present\n[ 30.657616][ T674] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000088\n...\n[ 30.657723][ T674] pc : __dev_printk+0x28/0xa0\n[ 30.657732][ T674] lr : _dev_err+0x7c/0xa0\n...\n[ 30.657772][ T674] Call trace:\n[ 30.657775][ T674] __dev_printk+0x28/0xa0\n[ 30.657778][ T674] _dev_err+0x7c/0xa0\n[ 30.657781][ T674] ssif_probe+0x548/0x900 [ipmi_ssif 62ce4b08badc1458fd896206d9ef69a3c31f3d3e]\n[ 30.657791][ T674] i2c_device_probe+0x37c/0x3c0\n...\nInitialize ssif_info->client before any error path can be taken. Clear\ni2c_client data in the error path to prevent the dangling pointer from\nleaking."], "name": "CVE-2021-47095", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-03-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-47095\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-47095\nhttps://lore.kernel.org/linux-cve-announce/2024030414-CVE-2021-47095-39dd@gregkh/T"], "threat_severity": "Moderate"}

{}