GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2026-23374 (GCVE-0-2026-23374)

Vulnerability from cvelistv5 – Published: 2026-03-25 10:27 – Updated: 2026-05-11 22:05
VLAI
Title
blktrace: fix __this_cpu_read/write in preemptible context
Summary
In the Linux kernel, the following vulnerability has been resolved: blktrace: fix __this_cpu_read/write in preemptible context tracing_record_cmdline() internally uses __this_cpu_read() and __this_cpu_write() on the per-CPU variable trace_cmdline_save, and trace_save_cmdline() explicitly asserts preemption is disabled via lockdep_assert_preemption_disabled(). These operations are only safe when preemption is off, as they were designed to be called from the scheduler context (probe_wakeup_sched_switch() / probe_wakeup()). __blk_add_trace() was calling tracing_record_cmdline(current) early in the blk_tracer path, before ring buffer reservation, from process context where preemption is fully enabled. This triggers the following using blktests/blktrace/002: blktrace/002 (blktrace ftrace corruption with sysfs trace) [failed] runtime 0.367s ... 0.437s something found in dmesg: [ 81.211018] run blktests blktrace/002 at 2026-02-25 22:24:33 [ 81.239580] null_blk: disk nullb1 created [ 81.357294] BUG: using __this_cpu_read() in preemptible [00000000] code: dd/2516 [ 81.362842] caller is tracing_record_cmdline+0x10/0x40 [ 81.362872] CPU: 16 UID: 0 PID: 2516 Comm: dd Tainted: G N 7.0.0-rc1lblk+ #84 PREEMPT(full) [ 81.362877] Tainted: [N]=TEST [ 81.362878] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014 [ 81.362881] Call Trace: [ 81.362884] <TASK> [ 81.362886] dump_stack_lvl+0x8d/0xb0 ... (See '/mnt/sda/blktests/results/nodev/blktrace/002.dmesg' for the entire message) [ 81.211018] run blktests blktrace/002 at 2026-02-25 22:24:33 [ 81.239580] null_blk: disk nullb1 created [ 81.357294] BUG: using __this_cpu_read() in preemptible [00000000] code: dd/2516 [ 81.362842] caller is tracing_record_cmdline+0x10/0x40 [ 81.362872] CPU: 16 UID: 0 PID: 2516 Comm: dd Tainted: G N 7.0.0-rc1lblk+ #84 PREEMPT(full) [ 81.362877] Tainted: [N]=TEST [ 81.362878] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014 [ 81.362881] Call Trace: [ 81.362884] <TASK> [ 81.362886] dump_stack_lvl+0x8d/0xb0 [ 81.362895] check_preemption_disabled+0xce/0xe0 [ 81.362902] tracing_record_cmdline+0x10/0x40 [ 81.362923] __blk_add_trace+0x307/0x5d0 [ 81.362934] ? lock_acquire+0xe0/0x300 [ 81.362940] ? iov_iter_extract_pages+0x101/0xa30 [ 81.362959] blk_add_trace_bio+0x106/0x1e0 [ 81.362968] submit_bio_noacct_nocheck+0x24b/0x3a0 [ 81.362979] ? lockdep_init_map_type+0x58/0x260 [ 81.362988] submit_bio_wait+0x56/0x90 [ 81.363009] __blkdev_direct_IO_simple+0x16c/0x250 [ 81.363026] ? __pfx_submit_bio_wait_endio+0x10/0x10 [ 81.363038] ? rcu_read_lock_any_held+0x73/0xa0 [ 81.363051] blkdev_read_iter+0xc1/0x140 [ 81.363059] vfs_read+0x20b/0x330 [ 81.363083] ksys_read+0x67/0xe0 [ 81.363090] do_syscall_64+0xbf/0xf00 [ 81.363102] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 81.363106] RIP: 0033:0x7f281906029d [ 81.363111] Code: 31 c0 e9 c6 fe ff ff 50 48 8d 3d 66 63 0a 00 e8 59 ff 01 00 66 0f 1f 84 00 00 00 00 00 80 3d 41 33 0e 00 00 74 17 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 5b c3 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec [ 81.363113] RSP: 002b:00007ffca127dd48 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 [ 81.363120] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f281906029d [ 81.363122] RDX: 0000000000001000 RSI: 0000559f8bfae000 RDI: 0000000000000000 [ 81.363123] RBP: 0000000000001000 R08: 0000002863a10a81 R09: 00007f281915f000 [ 81.363124] R10: 00007f2818f77b60 R11: 0000000000000246 R12: 0000559f8bfae000 [ 81.363126] R13: 0000000000000000 R14: 0000000000000000 R15: 000000000000000a [ 81.363142] </TASK> The same BUG fires from blk_add_trace_plug(), blk_add_trace_unplug(), and blk_add_trace_rq() paths as well. The purpose of tracin ---truncated---
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 7ffbd48d5cab22bcd1120eb2349db1319e2d827a , < aaba6ee63ba65b026401c94e2dd16b9f6e895934 (git)
Affected: 7ffbd48d5cab22bcd1120eb2349db1319e2d827a , < e5584932ac1dacc182c430d09e2b5490d1d4372b (git)
Affected: 7ffbd48d5cab22bcd1120eb2349db1319e2d827a , < 59efa088752b1c380a0475974679850cc8aef907 (git)
Affected: 7ffbd48d5cab22bcd1120eb2349db1319e2d827a , < da46b5dfef48658d03347cda21532bcdbb521e67 (git)
guessed Create a notification for this product.
Linux Linux Affected: 3.8
Unaffected: 0 , < 3.8 (semver)
Unaffected: 6.6.136 , ≤ 6.6.* (semver)
Unaffected: 6.12.82 , ≤ 6.12.* (semver)
Unaffected: 6.19.7 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "kernel/trace/blktrace.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "aaba6ee63ba65b026401c94e2dd16b9f6e895934",
              "status": "affected",
              "version": "7ffbd48d5cab22bcd1120eb2349db1319e2d827a",
              "versionType": "git"
            },
            {
              "lessThan": "e5584932ac1dacc182c430d09e2b5490d1d4372b",
              "status": "affected",
              "version": "7ffbd48d5cab22bcd1120eb2349db1319e2d827a",
              "versionType": "git"
            },
            {
              "lessThan": "59efa088752b1c380a0475974679850cc8aef907",
              "status": "affected",
              "version": "7ffbd48d5cab22bcd1120eb2349db1319e2d827a",
              "versionType": "git"
            },
            {
              "lessThan": "da46b5dfef48658d03347cda21532bcdbb521e67",
              "status": "affected",
              "version": "7ffbd48d5cab22bcd1120eb2349db1319e2d827a",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "kernel/trace/blktrace.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.8"
            },
            {
              "lessThan": "3.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.136",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.82",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.136",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.82",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.7",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "3.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblktrace: fix __this_cpu_read/write in preemptible context\n\ntracing_record_cmdline() internally uses __this_cpu_read() and\n__this_cpu_write() on the per-CPU variable trace_cmdline_save, and\ntrace_save_cmdline() explicitly asserts preemption is disabled via\nlockdep_assert_preemption_disabled(). These operations are only safe\nwhen preemption is off, as they were designed to be called from the\nscheduler context (probe_wakeup_sched_switch() / probe_wakeup()).\n\n__blk_add_trace() was calling tracing_record_cmdline(current) early in\nthe blk_tracer path, before ring buffer reservation, from process\ncontext where preemption is fully enabled. This triggers the following\nusing blktests/blktrace/002:\n\nblktrace/002 (blktrace ftrace corruption with sysfs trace)   [failed]\n    runtime  0.367s  ...  0.437s\n    something found in dmesg:\n    [   81.211018] run blktests blktrace/002 at 2026-02-25 22:24:33\n    [   81.239580] null_blk: disk nullb1 created\n    [   81.357294] BUG: using __this_cpu_read() in preemptible [00000000] code: dd/2516\n    [   81.362842] caller is tracing_record_cmdline+0x10/0x40\n    [   81.362872] CPU: 16 UID: 0 PID: 2516 Comm: dd Tainted: G                 N  7.0.0-rc1lblk+ #84 PREEMPT(full)\n    [   81.362877] Tainted: [N]=TEST\n    [   81.362878] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014\n    [   81.362881] Call Trace:\n    [   81.362884]  \u003cTASK\u003e\n    [   81.362886]  dump_stack_lvl+0x8d/0xb0\n    ...\n    (See \u0027/mnt/sda/blktests/results/nodev/blktrace/002.dmesg\u0027 for the entire message)\n\n[   81.211018] run blktests blktrace/002 at 2026-02-25 22:24:33\n[   81.239580] null_blk: disk nullb1 created\n[   81.357294] BUG: using __this_cpu_read() in preemptible [00000000] code: dd/2516\n[   81.362842] caller is tracing_record_cmdline+0x10/0x40\n[   81.362872] CPU: 16 UID: 0 PID: 2516 Comm: dd Tainted: G                 N  7.0.0-rc1lblk+ #84 PREEMPT(full)\n[   81.362877] Tainted: [N]=TEST\n[   81.362878] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014\n[   81.362881] Call Trace:\n[   81.362884]  \u003cTASK\u003e\n[   81.362886]  dump_stack_lvl+0x8d/0xb0\n[   81.362895]  check_preemption_disabled+0xce/0xe0\n[   81.362902]  tracing_record_cmdline+0x10/0x40\n[   81.362923]  __blk_add_trace+0x307/0x5d0\n[   81.362934]  ? lock_acquire+0xe0/0x300\n[   81.362940]  ? iov_iter_extract_pages+0x101/0xa30\n[   81.362959]  blk_add_trace_bio+0x106/0x1e0\n[   81.362968]  submit_bio_noacct_nocheck+0x24b/0x3a0\n[   81.362979]  ? lockdep_init_map_type+0x58/0x260\n[   81.362988]  submit_bio_wait+0x56/0x90\n[   81.363009]  __blkdev_direct_IO_simple+0x16c/0x250\n[   81.363026]  ? __pfx_submit_bio_wait_endio+0x10/0x10\n[   81.363038]  ? rcu_read_lock_any_held+0x73/0xa0\n[   81.363051]  blkdev_read_iter+0xc1/0x140\n[   81.363059]  vfs_read+0x20b/0x330\n[   81.363083]  ksys_read+0x67/0xe0\n[   81.363090]  do_syscall_64+0xbf/0xf00\n[   81.363102]  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n[   81.363106] RIP: 0033:0x7f281906029d\n[   81.363111] Code: 31 c0 e9 c6 fe ff ff 50 48 8d 3d 66 63 0a 00 e8 59 ff 01 00 66 0f 1f 84 00 00 00 00 00 80 3d 41 33 0e 00 00 74 17 31 c0 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 5b c3 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec\n[   81.363113] RSP: 002b:00007ffca127dd48 EFLAGS: 00000246 ORIG_RAX: 0000000000000000\n[   81.363120] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f281906029d\n[   81.363122] RDX: 0000000000001000 RSI: 0000559f8bfae000 RDI: 0000000000000000\n[   81.363123] RBP: 0000000000001000 R08: 0000002863a10a81 R09: 00007f281915f000\n[   81.363124] R10: 00007f2818f77b60 R11: 0000000000000246 R12: 0000559f8bfae000\n[   81.363126] R13: 0000000000000000 R14: 0000000000000000 R15: 000000000000000a\n[   81.363142]  \u003c/TASK\u003e\n\nThe same BUG fires from blk_add_trace_plug(), blk_add_trace_unplug(),\nand blk_add_trace_rq() paths as well.\n\nThe purpose of tracin\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:05:38.477Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/aaba6ee63ba65b026401c94e2dd16b9f6e895934"
        },
        {
          "url": "https://git.kernel.org/stable/c/e5584932ac1dacc182c430d09e2b5490d1d4372b"
        },
        {
          "url": "https://git.kernel.org/stable/c/59efa088752b1c380a0475974679850cc8aef907"
        },
        {
          "url": "https://git.kernel.org/stable/c/da46b5dfef48658d03347cda21532bcdbb521e67"
        }
      ],
      "title": "blktrace: fix __this_cpu_read/write in preemptible context",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23374",
    "datePublished": "2026-03-25T10:27:55.117Z",
    "dateReserved": "2026-01-13T15:37:46.003Z",
    "dateUpdated": "2026-05-11T22:05:38.477Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-23374",
      "date": "2026-09-19",
      "epss": "0.00119",
      "percentile": "0.02"
    },
    "microsoft_vex": {
      "current_release_date": "2026-05-02T14:38:06.000Z",
      "cve": "CVE-2026-23374",
      "id": "msrc_CVE-2026-23374",
      "initial_release_date": "2026-03-02T00:00:00.000Z",
      "product_status:fixed": "1",
      "product_status:known_affected": "4",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "blktrace: fix __this_cpu_read/write in preemptible context",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-23374.json",
      "version": "6"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "kernel/trace/blktrace.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "aaba6ee63ba65b026401c94e2dd16b9f6e895934",
                    "status": "affected",
                    "version": "7ffbd48d5cab22bcd1120eb2349db1319e2d827a",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "e5584932ac1dacc182c430d09e2b5490d1d4372b",
                    "status": "affected",
                    "version": "7ffbd48d5cab22bcd1120eb2349db1319e2d827a",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "59efa088752b1c380a0475974679850cc8aef907",
                    "status": "affected",
                    "version": "7ffbd48d5cab22bcd1120eb2349db1319e2d827a",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "da46b5dfef48658d03347cda21532bcdbb521e67",
                    "status": "affected",
                    "version": "7ffbd48d5cab22bcd1120eb2349db1319e2d827a",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "kernel/trace/blktrace.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "3.8"
                  },
                  {
                    "lessThan": "3.8",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.6.*",
                    "status": "unaffected",
                    "version": "6.6.136",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.12.*",
                    "status": "unaffected",
                    "version": "6.12.82",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.19.*",
                    "status": "unaffected",
                    "version": "6.19.7",
                    "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": "AB6C394B-F0A9-4190-9CBC-1BAB1C855A4B",
                    "versionEndExcluding": "6.12.82",
                    "versionStartIncluding": "3.8.1",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "C2A3780B-B1B6-4EA6-8269-4844D4E70029",
                    "versionEndExcluding": "6.19.7",
                    "versionStartIncluding": "6.13",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:3.8:-:*:*:*:*:*:*",
                    "matchCriteriaId": "BEE536AD-20BA-4893-AF2B-B6CF446F5FB3",
                    "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
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*",
                    "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*",
                    "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*",
                    "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*",
                    "matchCriteriaId": "512EE3A8-A590-4501-9A94-5D4B268D6138",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nblktrace: fix __this_cpu_read/write in preemptible context\n\ntracing_record_cmdline() internally uses __this_cpu_read() and\n__this_cpu_write() on the per-CPU variable trace_cmdline_save, and\ntrace_save_cmdline() explicitly asserts preemption is disabled via\nlockdep_assert_preemption_disabled(). These operations are only safe\nwhen preemption is off, as they were designed to be called from the\nscheduler context (probe_wakeup_sched_switch() / probe_wakeup()).\n\n__blk_add_trace() was calling tracing_record_cmdline(current) early in\nthe blk_tracer path, before ring buffer reservation, from process\ncontext where preemption is fully enabled. This triggers the following\nusing blktests/blktrace/002:\n\nblktrace/002 (blktrace ftrace corruption with sysfs trace)   [failed]\n    runtime  0.367s  ...  0.437s\n    something found in dmesg:\n    [   81.211018] run blktests blktrace/002 at 2026-02-25 22:24:33\n    [   81.239580] null_blk: disk nullb1 created\n    [   81.357294] BUG: using __this_cpu_read() in preemptible [00000000] code: dd/2516\n    [   81.362842] caller is tracing_record_cmdline+0x10/0x40\n    [   81.362872] CPU: 16 UID: 0 PID: 2516 Comm: dd Tainted: G                 N  7.0.0-rc1lblk+ #84 PREEMPT(full)\n    [   81.362877] Tainted: [N]=TEST\n    [   81.362878] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014\n    [   81.362881] Call Trace:\n    [   81.362884]  \u003cTASK\u003e\n    [   81.362886]  dump_stack_lvl+0x8d/0xb0\n    ...\n    (See \u0027/mnt/sda/blktests/results/nodev/blktrace/002.dmesg\u0027 for the entire message)\n\n[   81.211018] run blktests blktrace/002 at 2026-02-25 22:24:33\n[   81.239580] null_blk: disk nullb1 created\n[   81.357294] BUG: using __this_cpu_read() in preemptible [00000000] code: dd/2516\n[   81.362842] caller is tracing_record_cmdline+0x10/0x40\n[   81.362872] CPU: 16 UID: 0 PID: 2516 Comm: dd Tainted: G                 N  7.0.0-rc1lblk+ #84 PREEMPT(full)\n[   81.362877] Tainted: [N]=TEST\n[   81.362878] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.17.0-0-gb52ca86e094d-prebuilt.qemu.org 04/01/2014\n[   81.362881] Call Trace:\n[   81.362884]  \u003cTASK\u003e\n[   81.362886]  dump_stack_lvl+0x8d/0xb0\n[   81.362895]  check_preemption_disabled+0xce/0xe0\n[   81.362902]  tracing_record_cmdline+0x10/0x40\n[   81.362923]  __blk_add_trace+0x307/0x5d0\n[   81.362934]  ? lock_acquire+0xe0/0x300\n[   81.362940]  ? iov_iter_extract_pages+0x101/0xa30\n[   81.362959]  blk_add_trace_bio+0x106/0x1e0\n[   81.362968]  submit_bio_noacct_nocheck+0x24b/0x3a0\n[   81.362979]  ? lockdep_init_map_type+0x58/0x260\n[   81.362988]  submit_bio_wait+0x56/0x90\n[   81.363009]  __blkdev_direct_IO_simple+0x16c/0x250\n[   81.363026]  ? __pfx_submit_bio_wait_endio+0x10/0x10\n[   81.363038]  ? rcu_read_lock_any_held+0x73/0xa0\n[   81.363051]  blkdev_read_iter+0xc1/0x140\n[   81.363059]  vfs_read+0x20b/0x330\n[   81.363083]  ksys_read+0x67/0xe0\n[   81.363090]  do_syscall_64+0xbf/0xf00\n[   81.363102]  entry_SYSCALL_64_after_hwframe+0x76/0x7e\n[   81.363106] RIP: 0033:0x7f281906029d\n[   81.363111] Code: 31 c0 e9 c6 fe ff ff 50 48 8d 3d 66 63 0a 00 e8 59 ff 01 00 66 0f 1f 84 00 00 00 00 00 80 3d 41 33 0e 00 00 74 17 31 c0 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 5b c3 66 2e 0f 1f 84 00 00 00 00 00 48 83 ec\n[   81.363113] RSP: 002b:00007ffca127dd48 EFLAGS: 00000246 ORIG_RAX: 0000000000000000\n[   81.363120] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f281906029d\n[   81.363122] RDX: 0000000000001000 RSI: 0000559f8bfae000 RDI: 0000000000000000\n[   81.363123] RBP: 0000000000001000 R08: 0000002863a10a81 R09: 00007f281915f000\n[   81.363124] R10: 00007f2818f77b60 R11: 0000000000000246 R12: 0000559f8bfae000\n[   81.363126] R13: 0000000000000000 R14: 0000000000000000 R15: 000000000000000a\n[   81.363142]  \u003c/TASK\u003e\n\nThe same BUG fires from blk_add_trace_plug(), blk_add_trace_unplug(),\nand blk_add_trace_rq() paths as well.\n\nThe purpose of tracin\n---truncated---"
          }
        ],
        "id": "CVE-2026-23374",
        "lastModified": "2026-06-17T10:21:27.320",
        "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"
            }
          ]
        },
        "published": "2026-03-25T11:16:37.077",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/59efa088752b1c380a0475974679850cc8aef907"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/aaba6ee63ba65b026401c94e2dd16b9f6e895934"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/da46b5dfef48658d03347cda21532bcdbb521e67"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/e5584932ac1dacc182c430d09e2b5490d1d4372b"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-noinfo"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-28T07:20:32+00:00",
      "cve": "CVE-2026-23374",
      "id": "CVE-2026-23374",
      "initial_release_date": "2026-03-25T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: blktrace: fix __this_cpu_read/write in preemptible context",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23374.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-11T01:36:52Z",
      "cve": "CVE-2026-23374",
      "id": "CVE-2026-23374",
      "initial_release_date": "2026-03-25T16:55:16Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "305",
      "product_status:known_not_affected": "4",
      "product_status:recommended": "280",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-23374",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-23374.json",
      "version": "24"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.