CVE-2026-43416

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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/powerpc/perf/callchain.c", "arch/powerpc/perf/callchain_32.c", "arch/powerpc/perf/callchain_64.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "98074e16742ae87fb82e234b419783c5ffc9baea", "status": "affected", "version": "20002ded4d937ca87aca6253b874920a96a763c4", "versionType": "git"}, {"lessThan": "7e5f60b8cfc02a2b23a40a5f5fd2fa81d010e737", "status": "affected", "version": "20002ded4d937ca87aca6253b874920a96a763c4", "versionType": "git"}, {"lessThan": "e9bbfb4bfa86c6b5515b868d6982ac60505d7e39", "status": "affected", "version": "20002ded4d937ca87aca6253b874920a96a763c4", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/powerpc/perf/callchain.c", "arch/powerpc/perf/callchain_32.c", "arch/powerpc/perf/callchain_64.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.32"}, {"lessThan": "2.6.32", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.19", "versionType": "semver"}, {"lessThanOrEqual": "6.19.*", "status": "unaffected", "version": "6.19.9", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "96AC6DB0-3EDB-4183-8F29-8EC47393B50E", "versionEndExcluding": "6.18.19", "versionStartIncluding": "2.6.32", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E825E7C3-FEAC-4FD3-8A81-78D7387948C9", "versionEndExcluding": "6.19.9", "versionStartIncluding": "6.19", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*", "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*", "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*", "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc, perf: Check that current->mm is alive before getting user callchain\n\nIt may happen that mm is already released, which leads to kernel panic.\nThis adds the NULL check for current->mm, similarly to\ncommit 20afc60f892d (\"x86, perf: Check that current->mm is alive before getting user callchain\").\n\nI was getting this panic when running a profiling BPF program\n(profile.py from bcc-tools):\n\n [26215.051935] Kernel attempted to read user page (588) - exploit attempt? (uid: 0)\n [26215.051950] BUG: Kernel NULL pointer dereference on read at 0x00000588\n [26215.051952] Faulting instruction address: 0xc00000000020fac0\n [26215.051957] Oops: Kernel access of bad area, sig: 11 [#1]\n [...]\n [26215.052049] Call Trace:\n [26215.052050] [c000000061da6d30] [c00000000020fc10] perf_callchain_user_64+0x2d0/0x490 (unreliable)\n [26215.052054] [c000000061da6dc0] [c00000000020f92c] perf_callchain_user+0x1c/0x30\n [26215.052057] [c000000061da6de0] [c0000000005ab2a0] get_perf_callchain+0x100/0x360\n [26215.052063] [c000000061da6e70] [c000000000573bc8] bpf_get_stackid+0x88/0xf0\n [26215.052067] [c000000061da6ea0] [c008000000042258] bpf_prog_16d4ab9ab662f669_do_perf_event+0xf8/0x274\n [...]\n\nIn addition, move storing the top-level stack entry to generic\nperf_callchain_user to make sure the top-evel entry is always captured,\neven if current->mm is NULL.\n\n[Maddy: fixed message to avoid checkpatch format style error]"}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\npowerpc, perf: Verificar que current -> mm est\u00e9 activo antes de obtener la cadena de llamadas de usuario\n\nPuede ocurrir que mm ya est\u00e9 liberado, lo que lleva a un p\u00e1nico del kernel.\nEsto a\u00f1ade la verificaci\u00f3n de NULL para current -> mm, de forma similar a\ncommit 20afc60f892d (\u2019x86, perf: Verificar que current -> mm est\u00e9 activo antes de obtener la cadena de llamadas de usuario\u2019).\n\nEstaba experimentando este p\u00e1nico al ejecutar un programa BPF de perfilado\n(profile.py de bcc-tools):\n\n [26215.051935] El kernel intent\u00f3 leer la p\u00e1gina de usuario (588) - \u00bfintento de exploit? (uid: 0)\n [26215.051950] ERROR: Desreferencia de puntero NULL del kernel en lectura en 0x 00000588\n [26215.051952] Direcci\u00f3n de instrucci\u00f3n con fallo: 0x c00000000020fac0\n [26215.051957] Oops: Acceso del kernel a \u00e1rea incorrecta, sig: 11 [#1]\n [...]\n [26215.052049] Traza de llamadas:\n [26215.052050] [c000000061da6d30] [c00000000020fc10] perf_callchain_user_64+0x2d0/0x490 (no fiable)\n [26215.052054] [c000000061da6dc0] [c00000000020f92c] perf_callchain_user+0x1c/0x30\n [26215.052057] [c000000061da6de0] [c0000000005ab2a0] get_perf_callchain+0x100/0x360\n [26215.052063] [c000000061da6e70] [c000000000573bc8] bpf_get_stackid+0x88/0xf0\n [26215.052067] [c000000061da6ea0] [c008000000042258] bpf_prog_16d4ab9ab662f669_do_perf_event+0xf8/0x274\n [...]\n\nAdem\u00e1s, mover el almacenamiento de la entrada de pila de nivel superior a perf_callchain_user gen\u00e9rico para asegurar que la entrada de nivel superior siempre sea capturada, incluso si current -> mm es NULL.\n\n[Maddy: mensaje corregido para evitar el error de estilo de formato de checkpatch]"}], "id": "CVE-2026-43416", "lastModified": "2026-11-11T20:10:00.273", "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-2026-43416", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T15:37:49.414507Z", "version": "2.0.3"}}]}, "published": "2026-05-08T15:16:53.597", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7e5f60b8cfc02a2b23a40a5f5fd2fa81d010e737"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/98074e16742ae87fb82e234b419783c5ffc9baea"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e9bbfb4bfa86c6b5515b868d6982ac60505d7e39"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: powerpc, perf: Check that current->mm is alive before getting user callchain", "id": "2468165", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2468165"}, "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"}, "cwe": "CWE-826", "details": ["A flaw was found in the Linux kernel. A local user can cause a denial of service (DoS) by triggering a NULL pointer dereference within the `perf` subsystem. This occurs when the memory management structure (`current->mm`) is prematurely released before the system attempts to retrieve the user callchain, leading to a kernel panic. This vulnerability can be exploited by running a profiling BPF (Berkeley Packet Filter) program."], "name": "CVE-2026-43416", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"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": "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": "2026-05-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43416\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43416\nhttps://lore.kernel.org/linux-cve-announce/2026050845-CVE-2026-43416-8fb1@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[20002ded4d937ca87aca6253b874920a96a763c4,98074e16742ae87fb82e234b419783c5ffc9baea)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[20002ded4d937ca87aca6253b874920a96a763c4,7e5f60b8cfc02a2b23a40a5f5fd2fa81d010e737)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[20002ded4d937ca87aca6253b874920a96a763c4,e9bbfb4bfa86c6b5515b868d6982ac60505d7e39)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2.6.32"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.32)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.19,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.9,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-08T17:15:16.435959+00:00", "updated": "2026-05-26T16:45:06.389639+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}