{"affected":[{"defaultStatus":"unaffected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"lessThan":"81f44ed8c3f54abb7561ece774ea4cca5070b2f2","status":"affected","version":"cafe563591446cf80bfbc2fe3bc72a2e36cf1060","versionType":"git"},{"lessThan":"f50e7c325ab1207fe941555bcff659f6d7050572","status":"affected","version":"cafe563591446cf80bfbc2fe3bc72a2e36cf1060","versionType":"git"},{"lessThan":"9467d360be70e6ee55b0c1cd2a1f1424f57b5b85","status":"affected","version":"cafe563591446cf80bfbc2fe3bc72a2e36cf1060","versionType":"git"},{"lessThan":"47fa09fe7f3e09df28a51cb2cbd8f5d2f7f6edc1","status":"affected","version":"cafe563591446cf80bfbc2fe3bc72a2e36cf1060","versionType":"git"},{"lessThan":"add4982510f3b7c318a2dd7438bdc9c63171e753","status":"affected","version":"cafe563591446cf80bfbc2fe3bc72a2e36cf1060","versionType":"git"},{"lessThan":"2d6965581e164fa2ba3f7652ddae5535f6336576","status":"affected","version":"cafe563591446cf80bfbc2fe3bc72a2e36cf1060","versionType":"git"},{"lessThan":"4f71c8ba2dc009042493021d94a9718fbe2ebf27","status":"affected","version":"cafe563591446cf80bfbc2fe3bc72a2e36cf1060","versionType":"git"},{"lessThan":"383f7fec0de8cee1cf7ae1f9d9f14044a61f10f9","status":"affected","version":"cafe563591446cf80bfbc2fe3bc72a2e36cf1060","versionType":"git"},{"lessThan":"fec114a98b8735ee89c75216c45a78e28be0f128","status":"affected","version":"cafe563591446cf80bfbc2fe3bc72a2e36cf1060","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","source":"CNA: Linux","vendor":"Linux","versions":[{"status":"affected","version":"3.10"},{"lessThan":"3.10","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.10.*","status":"unaffected","version":"5.10.258","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.209","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.175","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.136","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.83","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.24","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.14","versionType":"semver"},{"lessThanOrEqual":"7.0.*","status":"unaffected","version":"7.0.1","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.1","versionType":"original_commit_for_fix"}]},{"defaultStatus":"unknown","product":"SIMATIC S7-1500 TM MFP - GNU/Linux subsystem","source":"ADP: siemens-SADP","vendor":"Siemens","versions":[{"lessThan":"*","status":"affected","version":"0","versionType":"custom"}]}],"cveId":"CVE-2026-31580","cwes":[],"description":"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.","epss":{"date":"2026-11-05","percentile":0.02736,"score":0.00131},"exploits":[],"kev":null,"metrics":[],"modifiedAt":1793915109216,"publishedAt":1777041730874,"references":[{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/81f44ed8c3f54abb7561ece774ea4cca5070b2f2"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/f50e7c325ab1207fe941555bcff659f6d7050572"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/9467d360be70e6ee55b0c1cd2a1f1424f57b5b85"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/47fa09fe7f3e09df28a51cb2cbd8f5d2f7f6edc1"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/add4982510f3b7c318a2dd7438bdc9c63171e753"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/2d6965581e164fa2ba3f7652ddae5535f6336576"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/4f71c8ba2dc009042493021d94a9718fbe2ebf27"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/383f7fec0de8cee1cf7ae1f9d9f14044a61f10f9"},{"source":"CNA: Linux","tags":[],"url":"https://git.kernel.org/stable/c/fec114a98b8735ee89c75216c45a78e28be0f128"},{"source":"ADP: siemens-SADP","tags":[],"url":"https://cert-portal.siemens.com/productcert/html/ssa-784472.html"}],"remediation":[],"revision":"77ff75e30b6630e5b3b5d9087a5d484aa45bc34e18a5d1d5f9a2105645ae2174","sources":[{"modifiedAt":1793915109216,"name":"CNA: Linux","retrievedAt":1793917106531,"url":"https://www.cve.org/CVERecord?id=CVE-2026-31580"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1793917131929,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-31580"}],"ssvc":{"assessedAt":1793914786970,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"bcache: fix cached_dev.sb_bio use-after-free and crash","updatedAt":1793917131929}