CVE-2023-53509

Estado: AnalizadaMedia (5.5)—

In the Linux kernel, the following vulnerability has been resolved:

qed: allow sleep in qed_mcp_trace_dump()

By default, qed_mcp_cmd_and_union() delays 10us at a time in a loop that can run 500K times, so calls to qed_mcp_nvm_rd_cmd() may block the current thread for over 5s. We observed thread scheduling delays over 700ms in production, with stacktraces pointing to this code as the culprit.

qed_mcp_trace_dump() is called from ethtool, so sleeping is permitted. It already can sleep in qed_mcp_halt(), which calls qed_mcp_cmd().

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Add a "can sleep" parameter to qed_find_nvram_image() and qed_nvram_read() so they can sleep during qed_mcp_trace_dump(). qed_mcp_trace_get_meta_info() and qed_mcp_trace_read_meta(), called only by qed_mcp_trace_dump(), allow these functions to sleep. I can't tell if the other caller (qed_grc_dump_mcp_hw_dump()) can sleep, so keep b_can_sleep set to false when it calls these functions.

Detalles técnicos trazas, registros y código del informe original

An example stacktrace from a custom warning we added to the kernel
showing a thread that has not scheduled despite long needing resched:
[ 2745.362925,17] ------------[ cut here ]------------
[ 2745.362941,17] WARNING: CPU: 23 PID: 5640 at arch/x86/kernel/irq.c:233 do_IRQ+0x15e/0x1a0()
[ 2745.362946,17] Thread not rescheduled for 744 ms after irq 99
[ 2745.362956,17] Modules linked in: ...
[ 2745.363339,17] CPU: 23 PID: 5640 Comm: lldpd Tainted: P           O    4.4.182+ #202104120910+6d1da174272d.61x
[ 2745.363343,17] Hardware name: FOXCONN MercuryB/Quicksilver Controller, BIOS H11P1N09 07/08/2020
[ 2745.363346,17]  0000000000000000 ffff885ec07c3ed8 ffffffff8131eb2f ffff885ec07c3f20
[ 2745.363358,17]  ffffffff81d14f64 ffff885ec07c3f10 ffffffff81072ac2 ffff88be98ed0000
[ 2745.363369,17]  0000000000000063 0000000000000174 0000000000000074 0000000000000000
[ 2745.363379,17] Call Trace:
[ 2745.363382,17]  <IRQ>  [<ffffffff8131eb2f>] dump_stack+0x8e/0xcf
[ 2745.363393,17]  [<ffffffff81072ac2>] warn_slowpath_common+0x82/0xc0
[ 2745.363398,17]  [<ffffffff81072b4c>] warn_slowpath_fmt+0x4c/0x50
[ 2745.363404,17]  [<ffffffff810d5a8e>] ? rcu_irq_exit+0xae/0xc0
[ 2745.363408,17]  [<ffffffff817c99fe>] do_IRQ+0x15e/0x1a0
[ 2745.363413,17]  [<ffffffff817c7ac9>] common_interrupt+0x89/0x89
[ 2745.363416,17]  <EOI>  [<ffffffff8132aa74>] ? delay_tsc+0x24/0x50
[ 2745.363425,17]  [<ffffffff8132aa04>] __udelay+0x34/0x40
[ 2745.363457,17]  [<ffffffffa04d45ff>] qed_mcp_cmd_and_union+0x36f/0x7d0 [qed]
[ 2745.363473,17]  [<ffffffffa04d5ced>] qed_mcp_nvm_rd_cmd+0x4d/0x90 [qed]
[ 2745.363490,17]  [<ffffffffa04e1dc7>] qed_mcp_trace_dump+0x4a7/0x630 [qed]
[ 2745.363504,17]  [<ffffffffa04e2556>] ? qed_fw_asserts_dump+0x1d6/0x1f0 [qed]
[ 2745.363520,17]  [<ffffffffa04e4ea7>] qed_dbg_mcp_trace_get_dump_buf_size+0x37/0x80 [qed]
[ 2745.363536,17]  [<ffffffffa04ea881>] qed_dbg_feature_size+0x61/0xa0 [qed]
[ 2745.363551,17]  [<ffffffffa04eb427>] qed_dbg_all_data_size+0x247/0x260 [qed]
[ 2745.363560,17]  [<ffffffffa0482c10>] qede_get_regs_len+0x30/0x40 [qede]
[ 2745.363566,17]  [<ffffffff816c9783>] ethtool_get_drvinfo+0xe3/0x190
[ 2745.363570,17]  [<ffffffff816cc152>] dev_ethtool+0x1362/0x2140
[ 2745.363575,17]  [<ffffffff8109bcc6>] ? finish_task_switch+0x76/0x260
[ 2745.363580,17]  [<ffffffff817c2116>] ? __schedule+0x3c6/0x9d0
[ 2745.363585,17]  [<ffffffff810dbd50>] ? hrtimer_start_range_ns+0x1d0/0x370
[ 2745.363589,17]  [<ffffffff816c1e5b>] ? dev_get_by_name_rcu+0x6b/0x90
[ 2745.363594,17]  [<ffffffff816de6a8>] dev_ioctl+0xe8/0x710
[ 2745.363599,17]  [<ffffffff816a58a8>] sock_do_ioctl+0x48/0x60
[ 2745.363603,17]  [<ffffffff816a5d87>] sock_ioctl+0x1c7/0x280
[ 2745.363608,17]  [<ffffffff8111f393>] ? seccomp_phase1+0x83/0x220
[ 2745.363612,17]  [<ffffffff811e3503>] do_vfs_ioctl+0x2b3/0x4e0
[ 2745.363616,17]  [<ffffffff811e3771>] SyS_ioctl+0x41/0x70
[ 2745.363619,17]  [<ffffffff817c6ffe>] entry_SYSCALL_64_fastpath+0x1e/0x79
[ 2745.363622,17] ---[ end trace f6954aa440266421 ]---

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Puntuación base: 5.5

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.15%
Percentil entre todas las CVEs puntuadas: 4
Fecha de la puntuación: 5/10/2026

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Linux — Linux Kernel

CWE

NVD-CWE-noinfo

Referencias

JSON original (NVD)

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{
  "id": "CVE-2023-53509",
  "cveTags": [],
  "metrics": {
    "cvssMetricV31": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.5,
          "attackVector": "LOCAL",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "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": "c965db44462919f613973aa618271f6c3f5a1e64",
              "lessThan": "e0387f4f39a8d92302273ac356d1f6b2a38160d8",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c965db44462919f613973aa618271f6c3f5a1e64",
              "lessThan": "50c81b35df01db12b348c5cbf4b1917dc9a7db54",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "c965db44462919f613973aa618271f6c3f5a1e64",
              "lessThan": "5401c3e0992860b11fb4b25796e4c4f1921740df",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "drivers/net/ethernet/qlogic/qed/qed_debug.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.9"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "4.9",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.0.19",
              "versionType": "semver",
              "lessThanOrEqual": "6.0.*"
            },
            {
              "status": "unaffected",
              "version": "6.1.5",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "status": "unaffected",
              "version": "6.2",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "drivers/net/ethernet/qlogic/qed/qed_debug.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-10-01T12:15:54.730",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/50c81b35df01db12b348c5cbf4b1917dc9a7db54",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5401c3e0992860b11fb4b25796e4c4f1921740df",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/e0387f4f39a8d92302273ac356d1f6b2a38160d8",
      "tags": [
        "Patch"
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "NVD-CWE-noinfo"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nqed: allow sleep in qed_mcp_trace_dump()\n\nBy default, qed_mcp_cmd_and_union() delays 10us at a time in a loop\nthat can run 500K times, so calls to qed_mcp_nvm_rd_cmd()\nmay block the current thread for over 5s.\nWe observed thread scheduling delays over 700ms in production,\nwith stacktraces pointing to this code as the culprit.\n\nqed_mcp_trace_dump() is called from ethtool, so sleeping is permitted.\nIt already can sleep in qed_mcp_halt(), which calls qed_mcp_cmd().\nAdd a \"can sleep\" parameter to qed_find_nvram_image() and\nqed_nvram_read() so they can sleep during qed_mcp_trace_dump().\nqed_mcp_trace_get_meta_info() and qed_mcp_trace_read_meta(),\ncalled only by qed_mcp_trace_dump(), allow these functions to sleep.\nI can't tell if the other caller (qed_grc_dump_mcp_hw_dump()) can sleep,\nso keep b_can_sleep set to false when it calls these functions.\n\nAn example stacktrace from a custom warning we added to the kernel\nshowing a thread that has not scheduled despite long needing resched:\n[ 2745.362925,17] ------------[ cut here ]------------\n[ 2745.362941,17] WARNING: CPU: 23 PID: 5640 at arch/x86/kernel/irq.c:233 do_IRQ+0x15e/0x1a0()\n[ 2745.362946,17] Thread not rescheduled for 744 ms after irq 99\n[ 2745.362956,17] Modules linked in: ...\n[ 2745.363339,17] CPU: 23 PID: 5640 Comm: lldpd Tainted: P           O    4.4.182+ #202104120910+6d1da174272d.61x\n[ 2745.363343,17] Hardware name: FOXCONN MercuryB/Quicksilver Controller, BIOS H11P1N09 07/08/2020\n[ 2745.363346,17]  0000000000000000 ffff885ec07c3ed8 ffffffff8131eb2f ffff885ec07c3f20\n[ 2745.363358,17]  ffffffff81d14f64 ffff885ec07c3f10 ffffffff81072ac2 ffff88be98ed0000\n[ 2745.363369,17]  0000000000000063 0000000000000174 0000000000000074 0000000000000000\n[ 2745.363379,17] Call Trace:\n[ 2745.363382,17]  <IRQ>  [<ffffffff8131eb2f>] dump_stack+0x8e/0xcf\n[ 2745.363393,17]  [<ffffffff81072ac2>] warn_slowpath_common+0x82/0xc0\n[ 2745.363398,17]  [<ffffffff81072b4c>] warn_slowpath_fmt+0x4c/0x50\n[ 2745.363404,17]  [<ffffffff810d5a8e>] ? rcu_irq_exit+0xae/0xc0\n[ 2745.363408,17]  [<ffffffff817c99fe>] do_IRQ+0x15e/0x1a0\n[ 2745.363413,17]  [<ffffffff817c7ac9>] common_interrupt+0x89/0x89\n[ 2745.363416,17]  <EOI>  [<ffffffff8132aa74>] ? delay_tsc+0x24/0x50\n[ 2745.363425,17]  [<ffffffff8132aa04>] __udelay+0x34/0x40\n[ 2745.363457,17]  [<ffffffffa04d45ff>] qed_mcp_cmd_and_union+0x36f/0x7d0 [qed]\n[ 2745.363473,17]  [<ffffffffa04d5ced>] qed_mcp_nvm_rd_cmd+0x4d/0x90 [qed]\n[ 2745.363490,17]  [<ffffffffa04e1dc7>] qed_mcp_trace_dump+0x4a7/0x630 [qed]\n[ 2745.363504,17]  [<ffffffffa04e2556>] ? qed_fw_asserts_dump+0x1d6/0x1f0 [qed]\n[ 2745.363520,17]  [<ffffffffa04e4ea7>] qed_dbg_mcp_trace_get_dump_buf_size+0x37/0x80 [qed]\n[ 2745.363536,17]  [<ffffffffa04ea881>] qed_dbg_feature_size+0x61/0xa0 [qed]\n[ 2745.363551,17]  [<ffffffffa04eb427>] qed_dbg_all_data_size+0x247/0x260 [qed]\n[ 2745.363560,17]  [<ffffffffa0482c10>] qede_get_regs_len+0x30/0x40 [qede]\n[ 2745.363566,17]  [<ffffffff816c9783>] ethtool_get_drvinfo+0xe3/0x190\n[ 2745.363570,17]  [<ffffffff816cc152>] dev_ethtool+0x1362/0x2140\n[ 2745.363575,17]  [<ffffffff8109bcc6>] ? finish_task_switch+0x76/0x260\n[ 2745.363580,17]  [<ffffffff817c2116>] ? __schedule+0x3c6/0x9d0\n[ 2745.363585,17]  [<ffffffff810dbd50>] ? hrtimer_start_range_ns+0x1d0/0x370\n[ 2745.363589,17]  [<ffffffff816c1e5b>] ? dev_get_by_name_rcu+0x6b/0x90\n[ 2745.363594,17]  [<ffffffff816de6a8>] dev_ioctl+0xe8/0x710\n[ 2745.363599,17]  [<ffffffff816a58a8>] sock_do_ioctl+0x48/0x60\n[ 2745.363603,17]  [<ffffffff816a5d87>] sock_ioctl+0x1c7/0x280\n[ 2745.363608,17]  [<ffffffff8111f393>] ? seccomp_phase1+0x83/0x220\n[ 2745.363612,17]  [<ffffffff811e3503>] do_vfs_ioctl+0x2b3/0x4e0\n[ 2745.363616,17]  [<ffffffff811e3771>] SyS_ioctl+0x41/0x70\n[ 2745.363619,17]  [<ffffffff817c6ffe>] entry_SYSCALL_64_fastpath+0x1e/0x79\n[ 2745.363622,17] ---[ end trace f6954aa440266421 ]---"
    }
  ],
  "lastModified": "2026-06-17T06:45:29.900",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "E7C6E70E-D2C5-4D3B-BCEE-3491FAF85860",
              "versionEndExcluding": "6.0.19",
              "versionStartIncluding": "4.9"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "8C1E7766-4310-43F9-BAC4-3763A36C043A",
              "versionEndExcluding": "6.1.5",
              "versionStartIncluding": "6.1"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "FF501633-2F44-4913-A8EE-B021929F49F6"
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "2BDA597B-CAC1-4DF0-86F0-42E142C654E9"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}