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GHSA-WVJX-P3C2-7WQP

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-17 06:33

Details

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

netfs: Fix barriering when walking subrequest list

Fix the barriering used when walking the subrequest list in retry as there's a possibility of seeing a subreq that's just been added by the application thread.

Severity

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72355"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:22:08Z",
    "severity": "CRITICAL"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix barriering when walking subrequest list\n\nFix the barriering used when walking the subrequest list in retry as\nthere\u0027s a possibility of seeing a subreq that\u0027s just been added by the\napplication thread.",
  "id": "GHSA-wvjx-p3c2-7wqp",
  "modified": "2026-08-17T06:33:25Z",
  "published": "2026-08-15T06:32:21Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72355"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5c6ce05e406520290c1d89da97fb3cd70c09137d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/be47c047250671c9225c0319ca4695be9b391c59"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-72355 (GCVE-0-2026-72355)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:55 – Updated: 2026-08-17 05:43

Title

netfs: Fix barriering when walking subrequest list

Summary

In the Linux kernel, the following vulnerability has been resolved: netfs: Fix barriering when walking subrequest list Fix the barriering used when walking the subrequest list in retry as there's a possibility of seeing a subreq that's just been added by the application thread.

Severity

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/be47c047250671c92…
https://git.kernel.org/stable/c/5c6ce05e406520290…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 288ace2f57c9d06dd2e42bd80d03747d879a4068 , < be47c047250671c9225c0319ca4695be9b391c59 (git) Affected: 288ace2f57c9d06dd2e42bd80d03747d879a4068 , < 5c6ce05e406520290c1d89da97fb3cd70c09137d (git)
Linux	Linux	Affected: 6.10 Unaffected: 0 , < 6.10 (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/netfs/read_retry.c",
            "fs/netfs/write_retry.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "be47c047250671c9225c0319ca4695be9b391c59",
              "status": "affected",
              "version": "288ace2f57c9d06dd2e42bd80d03747d879a4068",
              "versionType": "git"
            },
            {
              "lessThan": "5c6ce05e406520290c1d89da97fb3cd70c09137d",
              "status": "affected",
              "version": "288ace2f57c9d06dd2e42bd80d03747d879a4068",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/netfs/read_retry.c",
            "fs/netfs/write_retry.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "lessThan": "6.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              "negate": false,
              "operator": "OR"
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      "descriptions": [
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfs: Fix barriering when walking subrequest list\n\nFix the barriering used when walking the subrequest list in retry as\nthere\u0027s a possibility of seeing a subreq that\u0027s just been added by the\napplication thread."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The flaw is in the netfs client retry path used by SMB/CIFS, Ceph, NFS+fscache, and AFS; a remote malicious or MITM file server can trigger NEED_RETRY via short/error network responses during client read/write I/O.\nAC:L - The attacker controls both sides of the race by timing retry-inducing server responses and issuing concurrent reads/writes (multiple threads/fds); no victim-specific memory layout or rare uncontrollable state is required beyond normal mounted-FS I/O.\nPR:N - No local privileges on the victim are required; a remote attacker operating a malicious or compromised SMB/Ceph/NFS/AFS server can exploit any client with an active mount performing file I/O, without shell or admin access on the client.\nUI:N - On commonly pre-mounted enterprise/automounted network shares, kernel readahead and writeback can reach the buggy retry path without additional victim action at exploitation time beyond existing background file access.\nS:U - Exploitation corrupts the client kernel heap and enables local privilege escalation within the same kernel security domain; it does not by itself cross a VM/host or IOMMU boundary.\nC:H - Observing partially published subrequest entries yields stale start/len/flags/io_iter values, causing out-of-bounds kernel reads and information disclosure from adjacent memory via mis-sized iterators.\nI:H - Corrupted subrequest metadata drives wrong-span reissue_read/write, erroneous list deletion, and refcount manipulation, providing heap corruption primitives that can be leveraged for arbitrary kernel writes and code execution.\nA:H - Incorrect list traversal and mis-issued I/O can cause use-after-free, refcount underflow, kernel oops, or panic, reliably crashing or hanging the affected system."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:43:13.252Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/be47c047250671c9225c0319ca4695be9b391c59"
        },
        {
          "url": "https://git.kernel.org/stable/c/5c6ce05e406520290c1d89da97fb3cd70c09137d"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72355",
    "datePublished": "2026-08-15T05:55:56.812Z",
    "dateReserved": "2026-08-09T03:40:39.921Z",
    "dateUpdated": "2026-08-17T05:43:13.252Z",
    "state": "PUBLISHED"
  },
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}

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

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GHSA-WVJX-P3C2-7WQP

CVE-2026-72355 (GCVE-0-2026-72355)

Tags

Sightings

Nomenclature