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    "dateUpdated": "2026-08-05T12:23:05.931Z",
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              "version": "3.10"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "version": "5.10.258",
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            {
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              "status": "unaffected",
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              "status": "unaffected",
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              "status": "unaffected",
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          "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-\u003esb_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."
        }
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          "url": "https://git.kernel.org/stable/c/81f44ed8c3f54abb7561ece774ea4cca5070b2f2"
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          "url": "https://git.kernel.org/stable/c/f50e7c325ab1207fe941555bcff659f6d7050572"
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          "url": "https://git.kernel.org/stable/c/47fa09fe7f3e09df28a51cb2cbd8f5d2f7f6edc1"
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        {
          "url": "https://git.kernel.org/stable/c/add4982510f3b7c318a2dd7438bdc9c63171e753"
        },
        {
          "url": "https://git.kernel.org/stable/c/2d6965581e164fa2ba3f7652ddae5535f6336576"
        },
        {
          "url": "https://git.kernel.org/stable/c/4f71c8ba2dc009042493021d94a9718fbe2ebf27"
        },
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          "url": "https://git.kernel.org/stable/c/383f7fec0de8cee1cf7ae1f9d9f14044a61f10f9"
        },
        {
          "url": "https://git.kernel.org/stable/c/fec114a98b8735ee89c75216c45a78e28be0f128"
        }
      ],
      "title": "bcache: fix cached_dev.sb_bio use-after-free and crash",
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  "cveMetadata": {
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    "dateReserved": "2026-03-09T15:48:24.119Z",
    "dateUpdated": "2026-06-14T17:42:06.405Z",
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          "product": "Linux",
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          ],
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          "programFiles": [
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          "vendor": "Linux",
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              "version": "4.16"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: SEV: Protect *all* of sev_mem_enc_register_region() with kvm-\u003elock\n\nTake and hold kvm-\u003elock for before checking sev_guest() in\nsev_mem_enc_register_region(), as sev_guest() isn\u0027t stable unless kvm-\u003elock\nis held (or KVM can guarantee KVM_SEV_INIT{2} has completed and can\u0027t\nrollack state).  If KVM_SEV_INIT{2} fails, KVM can end up trying to add to\na not-yet-initialized sev-\u003eregions_list, e.g. triggering a #GP\n\n  Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI\n  KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\n  CPU: 110 UID: 0 PID: 72717 Comm: syz.15.11462 Tainted: G     U  W  O        6.16.0-smp-DEV #1 NONE\n  Tainted: [U]=USER, [W]=WARN, [O]=OOT_MODULE\n  Hardware name: Google, Inc. Arcadia_IT_80/Arcadia_IT_80, BIOS 12.52.0-0 10/28/2024\n  RIP: 0010:sev_mem_enc_register_region+0x3f0/0x4f0 ../include/linux/list.h:83\n  Code: \u003c41\u003e 80 3c 04 00 74 08 4c 89 ff e8 f1 c7 a2 00 49 39 ed 0f 84 c6 00\n  RSP: 0018:ffff88838647fbb8 EFLAGS: 00010256\n  RAX: dffffc0000000000 RBX: 1ffff92015cf1e0b RCX: dffffc0000000000\n  RDX: 0000000000000000 RSI: 0000000000001000 RDI: ffff888367870000\n  RBP: ffffc900ae78f050 R08: ffffea000d9e0007 R09: 1ffffd4001b3c000\n  R10: dffffc0000000000 R11: fffff94001b3c001 R12: 0000000000000000\n  R13: ffff8982ab0bde00 R14: ffffc900ae78f058 R15: 0000000000000000\n  FS:  00007f34e9dc66c0(0000) GS:ffff89ee64d33000(0000) knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 00007fe180adef98 CR3: 000000047210e000 CR4: 0000000000350ef0\n  Call Trace:\n   \u003cTASK\u003e\n   kvm_arch_vm_ioctl+0xa72/0x1240 ../arch/x86/kvm/x86.c:7371\n   kvm_vm_ioctl+0x649/0x990 ../virt/kvm/kvm_main.c:5363\n   __se_sys_ioctl+0x101/0x170 ../fs/ioctl.c:51\n   do_syscall_x64 ../arch/x86/entry/syscall_64.c:63 [inline]\n   do_syscall_64+0x6f/0x1f0 ../arch/x86/entry/syscall_64.c:94\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\n  RIP: 0033:0x7f34e9f7e9a9\n  Code: \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48\n  RSP: 002b:00007f34e9dc6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\n  RAX: ffffffffffffffda RBX: 00007f34ea1a6080 RCX: 00007f34e9f7e9a9\n  RDX: 0000200000000280 RSI: 000000008010aebb RDI: 0000000000000007\n  RBP: 00007f34ea000d69 R08: 0000000000000000 R09: 0000000000000000\n  R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\n  R13: 0000000000000000 R14: 00007f34ea1a6080 R15: 00007ffce77197a8\n   \u003c/TASK\u003e\n\nwith a syzlang reproducer that looks like:\n\n  syz_kvm_add_vcpu$x86(0x0, \u0026(0x7f0000000040)={0x0, \u0026(0x7f0000000180)=ANY=[], 0x70}) (async)\n  syz_kvm_add_vcpu$x86(0x0, \u0026(0x7f0000000080)={0x0, \u0026(0x7f0000000180)=ANY=[@ANYBLOB=\"...\"], 0x4f}) (async)\n  r0 = openat$kvm(0xffffffffffffff9c, \u0026(0x7f0000000200), 0x0, 0x0)\n  r1 = ioctl$KVM_CREATE_VM(r0, 0xae01, 0x0)\n  r2 = openat$kvm(0xffffffffffffff9c, \u0026(0x7f0000000240), 0x0, 0x0)\n  r3 = ioctl$KVM_CREATE_VM(r2, 0xae01, 0x0)\n  ioctl$KVM_SET_CLOCK(r3, 0xc008aeba, \u0026(0x7f0000000040)={0x1, 0x8, 0x0, 0x5625e9b0}) (async)\n  ioctl$KVM_SET_PIT2(r3, 0x8010aebb, \u0026(0x7f0000000280)={[...], 0x5}) (async)\n  ioctl$KVM_SET_PIT2(r1, 0x4070aea0, 0x0) (async)\n  r4 = ioctl$KVM_CREATE_VM(0xffffffffffffffff, 0xae01, 0x0)\n  openat$kvm(0xffffffffffffff9c, 0x0, 0x0, 0x0) (async)\n  ioctl$KVM_SET_USER_MEMORY_REGION(r4, 0x4020ae46, \u0026(0x7f0000000400)={0x0, 0x0, 0x0, 0x2000, \u0026(0x7f0000001000/0x2000)=nil}) (async)\n  r5 = ioctl$KVM_CREATE_VCPU(r4, 0xae41, 0x2)\n  close(r0) (async)\n  openat$kvm(0xffffffffffffff9c, \u0026(0x7f0000000000), 0x8000, 0x0) (async)\n  ioctl$KVM_SET_GUEST_DEBUG(r5, 0x4048ae9b, \u0026(0x7f0000000300)={0x4376ea830d46549b, 0x0, [0x46, 0x0, 0x0, 0x0, 0x0, 0x1000]}) (async)\n  ioctl$KVM_RUN(r5, 0xae80, 0x0)\n\nOpportunistically use guard() to avoid having to define a new error label\nand goto usage."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-14T17:42:32.960Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/35a0963d361f98bba798fd15d229dcb166c04684"
        },
        {
          "url": "https://git.kernel.org/stable/c/ab725ac3022469ecd4d7aa7d5646712e98b249d8"
        },
        {
          "url": "https://git.kernel.org/stable/c/0ff93ff0ba82e9511770e175fa50682a1ab14fb6"
        },
        {
          "url": "https://git.kernel.org/stable/c/b6408b6cec5df76a165575777800ef2aba12b109"
        }
      ],
      "title": "KVM: SEV: Protect *all* of sev_mem_enc_register_region() with kvm-\u003elock",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
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  "cveMetadata": {
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    "cveId": "CVE-2026-31592",
    "datePublished": "2026-04-24T14:42:18.921Z",
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    "dateUpdated": "2026-06-14T17:42:32.960Z",
    "state": "PUBLISHED"
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          {
            "defaultStatus": "unknown",
            "product": "SIMATIC S7-1500 CPU 1518-4 PN/DP MFP",
            "vendor": "Siemens",
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              {
                "lessThan": "*",
                "status": "affected",
                "version": "V3.1.6",
                "versionType": "custom"
              }
            ]
          },
          {
            "defaultStatus": "unknown",
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