CVE-2026-31580

{"id": "CVE-2026-31580", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-31580", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-11-05T21:39:46.970760Z"}}], "cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060", "lessThan": "81f44ed8c3f54abb7561ece774ea4cca5070b2f2", "versionType": "git"}, {"status": "affected", "version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060", "lessThan": "f50e7c325ab1207fe941555bcff659f6d7050572", "versionType": "git"}, {"status": "affected", "version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060", "lessThan": "9467d360be70e6ee55b0c1cd2a1f1424f57b5b85", "versionType": "git"}, {"status": "affected", "version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060", "lessThan": "47fa09fe7f3e09df28a51cb2cbd8f5d2f7f6edc1", "versionType": "git"}, {"status": "affected", "version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060", "lessThan": "add4982510f3b7c318a2dd7438bdc9c63171e753", "versionType": "git"}, {"status": "affected", "version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060", "lessThan": "2d6965581e164fa2ba3f7652ddae5535f6336576", "versionType": "git"}, {"status": "affected", "version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060", "lessThan": "4f71c8ba2dc009042493021d94a9718fbe2ebf27", "versionType": "git"}, {"status": "affected", "version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060", "lessThan": "383f7fec0de8cee1cf7ae1f9d9f14044a61f10f9", "versionType": "git"}, {"status": "affected", "version": "cafe563591446cf80bfbc2fe3bc72a2e36cf1060", "lessThan": "fec114a98b8735ee89c75216c45a78e28be0f128", "versionType": "git"}], "programFiles": ["drivers/md/bcache/super.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "3.10"}, {"status": "unaffected", "version": "0", "lessThan": "3.10", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.258", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.209", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.175", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.136", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.83", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.24", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.14", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0.1", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/md/bcache/super.c"], "defaultStatus": "affected"}]}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "affectedData": [{"vendor": "Siemens", "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem", "versions": [{"status": "affected", "version": "0", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}]}], "published": "2026-04-24T15:16:32.683", "references": [{"url": "https://git.kernel.org/stable/c/2d6965581e164fa2ba3f7652ddae5535f6336576", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/383f7fec0de8cee1cf7ae1f9d9f14044a61f10f9", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/47fa09fe7f3e09df28a51cb2cbd8f5d2f7f6edc1", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/4f71c8ba2dc009042493021d94a9718fbe2ebf27", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/81f44ed8c3f54abb7561ece774ea4cca5070b2f2", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/9467d360be70e6ee55b0c1cd2a1f1424f57b5b85", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/add4982510f3b7c318a2dd7438bdc9c63171e753", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/f50e7c325ab1207fe941555bcff659f6d7050572", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/fec114a98b8735ee89c75216c45a78e28be0f128", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html", "source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbcache: fix cached_dev.sb_bio use-after-free and crash\n\nIn our production environment, we have received multiple crash reports\nregarding libceph, which have caught our attention:\n\n```\n[6888366.280350] Call Trace:\n[6888366.280452] blk_update_request+0x14e/0x370\n[6888366.280561] blk_mq_end_request+0x1a/0x130\n[6888366.280671] rbd_img_handle_request+0x1a0/0x1b0 [rbd]\n[6888366.280792] rbd_obj_handle_request+0x32/0x40 [rbd]\n[6888366.280903] __complete_request+0x22/0x70 [libceph]\n[6888366.281032] osd_dispatch+0x15e/0xb40 [libceph]\n[6888366.281164] ? inet_recvmsg+0x5b/0xd0\n[6888366.281272] ? ceph_tcp_recvmsg+0x6f/0xa0 [libceph]\n[6888366.281405] ceph_con_process_message+0x79/0x140 [libceph]\n[6888366.281534] ceph_con_v1_try_read+0x5d7/0xf30 [libceph]\n[6888366.281661] ceph_con_workfn+0x329/0x680 [libceph]\n```\n\nAfter analyzing the coredump file, we found that the address of\ndc->sb_bio has been freed. We know that cached_dev is only freed when it\nis stopped.\n\nSince sb_bio is a part of struct cached_dev, rather than an alloc every\ntime. If the device is stopped while writing to the superblock, the\nreleased address will be accessed at endio.\n\nThis patch hopes to wait for sb_write to complete in cached_dev_free.\n\nIt should be noted that we analyzed the cause of the problem, then tell\nall details to the QWEN and adopted the modifications it made."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nbcache: corrige el uso despu\u00e9s de liberaci\u00f3n de cached_dev.sb_bio y la ca\u00edda\n\nEn nuestro entorno de producci\u00f3n, hemos recibido m\u00faltiples informes de ca\u00eddas relacionados con libceph, que han llamado nuestra atenci\u00f3n:\n\n\u201d\u201d\u201c\n[6888366.280350] Call Trace:\n[6888366.280452] blk_update_request+0x14e/0x370\n[6888366.280561] blk_mq_end_request+0x1a/0x130\n[6888366.280671] rbd_img_handle_request+0x1a0/0x1b0 [rbd]\n[6888366.280792] rbd_obj_handle_request+0x32/0x40 [rbd]\n[6888366.280903] __complete_request+0x22/0x70 [libceph]\n[6888366.281032] osd_dispatch+0x15e/0xb40 [libceph]\n[6888366.281164] ? inet_recvmsg+0x5b/0xd0\n[6888366.281272] ? ceph_tcp_recvmsg+0x6f/0xa0 [libceph]\n[6888366.281405] ceph_con_process_message+0x79/0x140 [libceph]\n[6888366.281534] ceph_con_v1_try_read+0x5d7/0xf30 [libceph]\n[6888366.281661] ceph_con_workfn+0x329/0x680 [libceph]\n\u201d\u201d\u201d\n\nDespu\u00e9s de analizar el archivo coredump, encontramos que la direcci\u00f3n de dc -> sb_bio ha sido liberada. Sabemos que cached_dev solo se libera cuando se detiene.\n\nDado que sb_bio es parte de la estructura cached_dev, en lugar de una asignaci\u00f3n cada vez. Si el dispositivo se detiene mientras se escribe en el superbloque, la direcci\u00f3n liberada ser\u00e1 accedida en endio.\n\nEste parche espera a que sb_write se complete en cached_dev_free.\n\nCabe se\u00f1alar que analizamos la causa del problema, luego contamos todos los detalles a QWEN y adoptamos las modificaciones que realiz\u00f3."}], "lastModified": "2026-11-11T23:10:00.263", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "14109CEF-714B-4029-A318-97AA58A01833", "versionEndExcluding": "6.6.136"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A8BAD957-8E20-401C-A129-DFF3655CA0B7", "versionEndExcluding": "6.12.83", "versionStartIncluding": "6.12"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8126B8B8-6D0B-4443-86C1-672AEE893555", "versionEndExcluding": "6.18.24", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "D6A8A074-BBF4-4803-ABED-519A839435BB", "versionEndExcluding": "6.19.14", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "9B5888AB-7403-4335-89E4-21CC0B48366A", "versionEndExcluding": "7.0.1", "versionStartIncluding": "7.0"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}