github - ghsa-9x2c-7hh8-w98c

GHSA-9X2C-7HH8-W98C

Vulnerability from github – Published: 2025-09-15 15:31 – Updated: 2025-12-04 15:30

Details

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

ext4: Fix function prototype mismatch for ext4_feat_ktype

With clang's kernel control flow integrity (kCFI, CONFIG_CFI_CLANG), indirect call targets are validated against the expected function pointer prototype to make sure the call target is valid to help mitigate ROP attacks. If they are not identical, there is a failure at run time, which manifests as either a kernel panic or thread getting killed.

ext4_feat_ktype was setting the "release" handler to "kfree", which doesn't have a matching function prototype. Add a simple wrapper with the correct prototype.

This was found as a result of Clang's new -Wcast-function-type-strict flag, which is more sensitive than the simpler -Wcast-function-type, which only checks for type width mismatches.

Note that this code is only reached when ext4 is a loadable module and it is being unloaded:

CFI failure at kobject_put+0xbb/0x1b0 (target: kfree+0x0/0x180; expected type: 0x7c4aa698) ... RIP: 0010:kobject_put+0xbb/0x1b0 ... Call Trace: ext4_exit_sysfs+0x14/0x60 [ext4] cleanup_module+0x67/0xedb [ext4]

Severity ?

5.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2023-53224"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-401"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-09-15T15:15:49Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\next4: Fix function prototype mismatch for ext4_feat_ktype\n\nWith clang\u0027s kernel control flow integrity (kCFI, CONFIG_CFI_CLANG),\nindirect call targets are validated against the expected function\npointer prototype to make sure the call target is valid to help mitigate\nROP attacks. If they are not identical, there is a failure at run time,\nwhich manifests as either a kernel panic or thread getting killed.\n\next4_feat_ktype was setting the \"release\" handler to \"kfree\", which\ndoesn\u0027t have a matching function prototype. Add a simple wrapper\nwith the correct prototype.\n\nThis was found as a result of Clang\u0027s new -Wcast-function-type-strict\nflag, which is more sensitive than the simpler -Wcast-function-type,\nwhich only checks for type width mismatches.\n\nNote that this code is only reached when ext4 is a loadable module and\nit is being unloaded:\n\n CFI failure at kobject_put+0xbb/0x1b0 (target: kfree+0x0/0x180; expected type: 0x7c4aa698)\n ...\n RIP: 0010:kobject_put+0xbb/0x1b0\n ...\n Call Trace:\n  \u003cTASK\u003e\n  ext4_exit_sysfs+0x14/0x60 [ext4]\n  cleanup_module+0x67/0xedb [ext4]",
  "id": "GHSA-9x2c-7hh8-w98c",
  "modified": "2025-12-04T15:30:32Z",
  "published": "2025-09-15T15:31:28Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53224"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0a1394e07c5d6bf1bfc25db8589ff1b1bfb6f46a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/118901ad1f25d2334255b3d50512fa20591531cd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1ba10d3640e9783dad811fe4e24d55465c37c64d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2b69cdd9f9a7f596e3dd31f05f9852940d177924"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/94d8de83286fb1827340eba35b61c308f6b46ead"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/99e3fd21f8fc975c95e8cf76fbf6a3d2656f8f71"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c98077f7598a562f51051eec043be0cb3e1b1b5e"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2023-53224 (GCVE-0-2023-53224)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:21 – Updated: 2025-09-15 14:21

Summary

In the Linux kernel, the following vulnerability has been resolved: ext4: Fix function prototype mismatch for ext4_feat_ktype With clang's kernel control flow integrity (kCFI, CONFIG_CFI_CLANG), indirect call targets are validated against the expected function pointer prototype to make sure the call target is valid to help mitigate ROP attacks. If they are not identical, there is a failure at run time, which manifests as either a kernel panic or thread getting killed. ext4_feat_ktype was setting the "release" handler to "kfree", which doesn't have a matching function prototype. Add a simple wrapper with the correct prototype. This was found as a result of Clang's new -Wcast-function-type-strict flag, which is more sensitive than the simpler -Wcast-function-type, which only checks for type width mismatches. Note that this code is only reached when ext4 is a loadable module and it is being unloaded: CFI failure at kobject_put+0xbb/0x1b0 (target: kfree+0x0/0x180; expected type: 0x7c4aa698) ... RIP: 0010:kobject_put+0xbb/0x1b0 ... Call Trace: <TASK> ext4_exit_sysfs+0x14/0x60 [ext4] cleanup_module+0x67/0xedb [ext4]

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/2b69cdd9f9a7f596e…
	https://git.kernel.org/stable/c/99e3fd21f8fc975c9…
	https://git.kernel.org/stable/c/1ba10d3640e9783da…
	https://git.kernel.org/stable/c/c98077f7598a562f5…
	https://git.kernel.org/stable/c/0a1394e07c5d6bf1b…
	https://git.kernel.org/stable/c/94d8de83286fb1827…
	https://git.kernel.org/stable/c/118901ad1f25d2334…

Impacted products

Vendor

Product

Version

Linux

Affected: b99fee58a20ab8e0557cce87b6f187e325993142 , < 2b69cdd9f9a7f596e3dd31f05f9852940d177924 (git)
Affected: b99fee58a20ab8e0557cce87b6f187e325993142 , < 99e3fd21f8fc975c95e8cf76fbf6a3d2656f8f71 (git)
Affected: b99fee58a20ab8e0557cce87b6f187e325993142 , < 1ba10d3640e9783dad811fe4e24d55465c37c64d (git)
Affected: b99fee58a20ab8e0557cce87b6f187e325993142 , < c98077f7598a562f51051eec043be0cb3e1b1b5e (git)
Affected: b99fee58a20ab8e0557cce87b6f187e325993142 , < 0a1394e07c5d6bf1bfc25db8589ff1b1bfb6f46a (git)
Affected: b99fee58a20ab8e0557cce87b6f187e325993142 , < 94d8de83286fb1827340eba35b61c308f6b46ead (git)
Affected: b99fee58a20ab8e0557cce87b6f187e325993142 , < 118901ad1f25d2334255b3d50512fa20591531cd (git)

Linux

Affected: 4.16
Unaffected: 0 , < 4.16 (semver)
Unaffected: 4.19.274 , ≤ 4.19.* (semver)
Unaffected: 5.4.233 , ≤ 5.4.* (semver)
Unaffected: 5.10.170 , ≤ 5.10.* (semver)
Unaffected: 5.15.96 , ≤ 5.15.* (semver)
Unaffected: 6.1.14 , ≤ 6.1.* (semver)
Unaffected: 6.2.1 , ≤ 6.2.* (semver)
Unaffected: 6.3 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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}

Sightings

Author	Source	Type	Date

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.

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GHSA-9X2C-7HH8-W98C

CVE-2023-53224 (GCVE-0-2023-53224)

Tags

Sightings

Nomenclature