CVE-2025-39932 (GCVE-0-2025-39932)

Vulnerability from cvelistv5 – Published: 2025-10-04 07:30 – Updated: 2026-05-11 21:39
VLAI
Title
smb: client: let smbd_destroy() call disable_work_sync(&info->post_send_credits_work)
Summary
In the Linux kernel, the following vulnerability has been resolved: smb: client: let smbd_destroy() call disable_work_sync(&info->post_send_credits_work) In smbd_destroy() we may destroy the memory so we better wait until post_send_credits_work is no longer pending and will never be started again. I actually just hit the case using rxe: WARNING: CPU: 0 PID: 138 at drivers/infiniband/sw/rxe/rxe_verbs.c:1032 rxe_post_recv+0x1ee/0x480 [rdma_rxe] ... [ 5305.686979] [ T138] smbd_post_recv+0x445/0xc10 [cifs] [ 5305.687135] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5 [ 5305.687149] [ T138] ? __kasan_check_write+0x14/0x30 [ 5305.687185] [ T138] ? __pfx_smbd_post_recv+0x10/0x10 [cifs] [ 5305.687329] [ T138] ? __pfx__raw_spin_lock_irqsave+0x10/0x10 [ 5305.687356] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5 [ 5305.687368] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5 [ 5305.687378] [ T138] ? _raw_spin_unlock_irqrestore+0x11/0x60 [ 5305.687389] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5 [ 5305.687399] [ T138] ? get_receive_buffer+0x168/0x210 [cifs] [ 5305.687555] [ T138] smbd_post_send_credits+0x382/0x4b0 [cifs] [ 5305.687701] [ T138] ? __pfx_smbd_post_send_credits+0x10/0x10 [cifs] [ 5305.687855] [ T138] ? __pfx___schedule+0x10/0x10 [ 5305.687865] [ T138] ? __pfx__raw_spin_lock_irq+0x10/0x10 [ 5305.687875] [ T138] ? queue_delayed_work_on+0x8e/0xa0 [ 5305.687889] [ T138] process_one_work+0x629/0xf80 [ 5305.687908] [ T138] ? srso_alias_return_thunk+0x5/0xfbef5 [ 5305.687917] [ T138] ? __kasan_check_write+0x14/0x30 [ 5305.687933] [ T138] worker_thread+0x87f/0x1570 ... It means rxe_post_recv was called after rdma_destroy_qp(). This happened because put_receive_buffer() was triggered by ib_drain_qp() and called: queue_work(info->workqueue, &info->post_send_credits_work);
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
Linux Linux Affected: f198186aa9bbd60fae7a2061f4feec614d880299 , < 6ae90a2baf923e85eb037b636aa641250bf4220f (git)
Affected: f198186aa9bbd60fae7a2061f4feec614d880299 , < 3fabb1236f2e3ad78d531be0a4ad9f4a4ccdda87 (git)
Affected: f198186aa9bbd60fae7a2061f4feec614d880299 , < d9dcbbcf9145b68aa85c40947311a6907277e097 (git)
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Linux Linux Affected: 4.16
Unaffected: 0 , < 4.16 (semver)
Unaffected: 6.12.49 , ≤ 6.12.* (semver)
Unaffected: 6.16.9 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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      "affected": [
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          "product": "Linux",
          "programFiles": [
            "fs/smb/client/smbdirect.c"
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            "fs/smb/client/smbdirect.c"
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          "vendor": "Linux",
          "versions": [
            {
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              "version": "4.16"
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.12.49",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.16.*",
              "status": "unaffected",
              "version": "6.16.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17",
              "versionType": "original_commit_for_fix"
            }
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        }
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      "cpeApplicability": [
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                },
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              ],
              "negate": false,
              "operator": "OR"
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          ]
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: let smbd_destroy() call disable_work_sync(\u0026info-\u003epost_send_credits_work)\n\nIn smbd_destroy() we may destroy the memory so we better\nwait until post_send_credits_work is no longer pending\nand will never be started again.\n\nI actually just hit the case using rxe:\n\nWARNING: CPU: 0 PID: 138 at drivers/infiniband/sw/rxe/rxe_verbs.c:1032 rxe_post_recv+0x1ee/0x480 [rdma_rxe]\n...\n[ 5305.686979] [    T138]  smbd_post_recv+0x445/0xc10 [cifs]\n[ 5305.687135] [    T138]  ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687149] [    T138]  ? __kasan_check_write+0x14/0x30\n[ 5305.687185] [    T138]  ? __pfx_smbd_post_recv+0x10/0x10 [cifs]\n[ 5305.687329] [    T138]  ? __pfx__raw_spin_lock_irqsave+0x10/0x10\n[ 5305.687356] [    T138]  ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687368] [    T138]  ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687378] [    T138]  ? _raw_spin_unlock_irqrestore+0x11/0x60\n[ 5305.687389] [    T138]  ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687399] [    T138]  ? get_receive_buffer+0x168/0x210 [cifs]\n[ 5305.687555] [    T138]  smbd_post_send_credits+0x382/0x4b0 [cifs]\n[ 5305.687701] [    T138]  ? __pfx_smbd_post_send_credits+0x10/0x10 [cifs]\n[ 5305.687855] [    T138]  ? __pfx___schedule+0x10/0x10\n[ 5305.687865] [    T138]  ? __pfx__raw_spin_lock_irq+0x10/0x10\n[ 5305.687875] [    T138]  ? queue_delayed_work_on+0x8e/0xa0\n[ 5305.687889] [    T138]  process_one_work+0x629/0xf80\n[ 5305.687908] [    T138]  ? srso_alias_return_thunk+0x5/0xfbef5\n[ 5305.687917] [    T138]  ? __kasan_check_write+0x14/0x30\n[ 5305.687933] [    T138]  worker_thread+0x87f/0x1570\n...\n\nIt means rxe_post_recv was called after rdma_destroy_qp().\nThis happened because put_receive_buffer() was triggered\nby ib_drain_qp() and called:\nqueue_work(info-\u003eworkqueue, \u0026info-\u003epost_send_credits_work);"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T21:39:12.700Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6ae90a2baf923e85eb037b636aa641250bf4220f"
        },
        {
          "url": "https://git.kernel.org/stable/c/3fabb1236f2e3ad78d531be0a4ad9f4a4ccdda87"
        },
        {
          "url": "https://git.kernel.org/stable/c/d9dcbbcf9145b68aa85c40947311a6907277e097"
        }
      ],
      "title": "smb: client: let smbd_destroy() call disable_work_sync(\u0026info-\u003epost_send_credits_work)",
      "x_generator": {
        "engine": "bippy-1.2.0"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39932",
    "datePublished": "2025-10-04T07:30:56.726Z",
    "dateReserved": "2025-04-16T07:20:57.148Z",
    "dateUpdated": "2026-05-11T21:39:12.700Z",
    "state": "PUBLISHED"
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  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-39932",
      "date": "2026-07-19",
      "epss": "0.00135",
      "percentile": "0.03315"
    },
    "microsoft_vex": {
      "current_release_date": "2026-06-28T01:45:00.000Z",
      "cve": "CVE-2025-39932",
      "id": "msrc_CVE-2025-39932",
      "initial_release_date": "2025-10-02T00:00:00.000Z",
      "product_status:known_affected": "15",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "smb: client: let smbd_destroy() call disable_work_sync(\u0026info-\u003epost_send_credits_work)",
      "url": "https://msrc.microsoft.com/csaf/vex/2025/msrc_cve-2025-39932.json",
      "version": "14"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-39932\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-04T08:15:45.953\",\"lastModified\":\"2026-06-17T09:18:51.720\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsmb: client: let smbd_destroy() call disable_work_sync(\u0026info-\u003epost_send_credits_work)\\n\\nIn smbd_destroy() we may destroy the memory so we better\\nwait until post_send_credits_work is no longer pending\\nand will never be started again.\\n\\nI actually just hit the case using rxe:\\n\\nWARNING: CPU: 0 PID: 138 at drivers/infiniband/sw/rxe/rxe_verbs.c:1032 rxe_post_recv+0x1ee/0x480 [rdma_rxe]\\n...\\n[ 5305.686979] [    T138]  smbd_post_recv+0x445/0xc10 [cifs]\\n[ 5305.687135] [    T138]  ? srso_alias_return_thunk+0x5/0xfbef5\\n[ 5305.687149] [    T138]  ? __kasan_check_write+0x14/0x30\\n[ 5305.687185] [    T138]  ? __pfx_smbd_post_recv+0x10/0x10 [cifs]\\n[ 5305.687329] [    T138]  ? __pfx__raw_spin_lock_irqsave+0x10/0x10\\n[ 5305.687356] [    T138]  ? srso_alias_return_thunk+0x5/0xfbef5\\n[ 5305.687368] [    T138]  ? srso_alias_return_thunk+0x5/0xfbef5\\n[ 5305.687378] [    T138]  ? _raw_spin_unlock_irqrestore+0x11/0x60\\n[ 5305.687389] [    T138]  ? srso_alias_return_thunk+0x5/0xfbef5\\n[ 5305.687399] [    T138]  ? get_receive_buffer+0x168/0x210 [cifs]\\n[ 5305.687555] [    T138]  smbd_post_send_credits+0x382/0x4b0 [cifs]\\n[ 5305.687701] [    T138]  ? __pfx_smbd_post_send_credits+0x10/0x10 [cifs]\\n[ 5305.687855] [    T138]  ? __pfx___schedule+0x10/0x10\\n[ 5305.687865] [    T138]  ? __pfx__raw_spin_lock_irq+0x10/0x10\\n[ 5305.687875] [    T138]  ? queue_delayed_work_on+0x8e/0xa0\\n[ 5305.687889] [    T138]  process_one_work+0x629/0xf80\\n[ 5305.687908] [    T138]  ? srso_alias_return_thunk+0x5/0xfbef5\\n[ 5305.687917] [    T138]  ? __kasan_check_write+0x14/0x30\\n[ 5305.687933] [    T138]  worker_thread+0x87f/0x1570\\n...\\n\\nIt means rxe_post_recv was called after rdma_destroy_qp().\\nThis happened because put_receive_buffer() was triggered\\nby ib_drain_qp() and called:\\nqueue_work(info-\u003eworkqueue, \u0026info-\u003epost_send_credits_work);\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/smb/client/smbdirect.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"f198186aa9bbd60fae7a2061f4feec614d880299\",\"lessThan\":\"6ae90a2baf923e85eb037b636aa641250bf4220f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f198186aa9bbd60fae7a2061f4feec614d880299\",\"lessThan\":\"3fabb1236f2e3ad78d531be0a4ad9f4a4ccdda87\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f198186aa9bbd60fae7a2061f4feec614d880299\",\"lessThan\":\"d9dcbbcf9145b68aa85c40947311a6907277e097\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/smb/client/smbdirect.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.16\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.16\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.49\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.16.9\",\"lessThanOrEqual\":\"6.16.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.17\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"4.16\",\"versionEndExcluding\":\"6.12.49\",\"matchCriteriaId\":\"DFEC22E5-D6FE-4371-A285-92B65EBAE3F3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.16.9\",\"matchCriteriaId\":\"638DD910-1189-4F5E-98BF-2D436B695112\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"327D22EF-390B-454C-BD31-2ED23C998A1C\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"C730CD9A-D969-4A8E-9522-162AAF7C0EE9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"39982C4B-716E-4B2F-8196-FA301F47807D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"340BEEA9-D70D-4290-B502-FBB1032353B1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.17:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"47E4C5C0-079F-4838-971B-8C503D48FCC2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.17:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"5A4516A6-C12E-42A4-8C0E-68AEF3264504\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3fabb1236f2e3ad78d531be0a4ad9f4a4ccdda87\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6ae90a2baf923e85eb037b636aa641250bf4220f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/d9dcbbcf9145b68aa85c40947311a6907277e097\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-30T01:25:09+00:00",
      "cve": "CVE-2025-39932",
      "id": "CVE-2025-39932",
      "initial_release_date": "2025-10-04T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: smb: client: let smbd_destroy() call disable_work_sync(\u0026#38;info-\u003epost_send_credits_work)",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-39932.json",
      "version": "3"
    }
  }
}



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