Vulnerability-Lookup

FKIE_CVE-2024-26736

Vulnerability from fkie_nvd - Published: 2024-04-03 17:15 - Updated: 2026-08-04 11:16

Severity

8.1 (High) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: afs: Increase buffer size in afs_update_volume_status() The max length of volume->vid value is 20 characters. So increase idbuf[] size up to 24 to avoid overflow. Found by Linux Verification Center (linuxtesting.org) with SVACE. [DH: Actually, it's 20 + NUL, so increase it to 24 and use snprintf()]

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5c27d85a69fa16a08813ba37ddfb4bbc9a1ed6b5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6e6065dd25b661420fac19c34282b6c626fcd35e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6ea38e2aeb72349cad50e38899b0ba6fbcb2af3d	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d34a5e57632bb5ff825196ddd9a48ca403626dfa	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d9b5e2b7a8196850383c70d099bfd39e81ab6637	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e56662160fc24d28cb75ac095cc6415ae1bda43e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e8530b170e464017203e3b8c6c49af6e916aece1	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/5c27d85a69fa16a08813ba37ddfb4bbc9a1ed6b5	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/6e6065dd25b661420fac19c34282b6c626fcd35e	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/6ea38e2aeb72349cad50e38899b0ba6fbcb2af3d	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/d34a5e57632bb5ff825196ddd9a48ca403626dfa	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/d9b5e2b7a8196850383c70d099bfd39e81ab6637	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/e56662160fc24d28cb75ac095cc6415ae1bda43e	Patch
af854a3a-2127-422b-91ae-364da2661108	https://git.kernel.org/stable/c/e8530b170e464017203e3b8c6c49af6e916aece1	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html	Mailing List

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.8
linux	linux_kernel	6.8
linux	linux_kernel	6.8
linux	linux_kernel	6.8
linux	linux_kernel	6.8
debian	debian_linux	10.0

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/afs/volume.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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            },
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            },
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            },
            {
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              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
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              "version": "4.15"
            },
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              "lessThan": "4.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
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              "version": "5.4.270",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.211",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.150",
              "versionType": "semver"
            },
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              "status": "unaffected",
              "version": "6.1.80",
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            },
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              "lessThanOrEqual": "6.6.*",
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              "version": "6.6.19",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.7.*",
              "status": "unaffected",
              "version": "6.7.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.8",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
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  "configurations": [
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              "matchCriteriaId": "056BD938-0A27-4569-B391-30578B309EE3",
              "vulnerable": true
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              "vulnerable": true
            }
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        }
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    },
    {
      "nodes": [
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          "cpeMatch": [
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              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nafs: Increase buffer size in afs_update_volume_status()\n\nThe max length of volume-\u003evid value is 20 characters.\nSo increase idbuf[] size up to 24 to avoid overflow.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE.\n\n[DH: Actually, it\u0027s 20 + NUL, so increase it to 24 and use snprintf()]"
    },
    {
      "lang": "es",
      "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: afs: aumenta el tama\u00f1o del b\u00fafer en afs_update_volume_status() La longitud m\u00e1xima del volumen-\u0026gt;valor vid es de 20 caracteres. Por lo tanto, aumente el tama\u00f1o de idbuf[] hasta 24 para evitar el desbordamiento. Encontrado por el Centro de verificaci\u00f3n de Linux (linuxtesting.org) con SVACE. [DH: En realidad, es 20 + NUL, as\u00ed que aum\u00e9ntalo a 24 y usa snprintf()]"
    }
  ],
  "id": "CVE-2024-26736",
  "lastModified": "2026-08-04T11:16:59.720",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2024-26736",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2024-04-05T17:35:04.677455Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2024-04-03T17:15:51.197",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/5c27d85a69fa16a08813ba37ddfb4bbc9a1ed6b5"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    },
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    },
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    },
    {
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      "tags": [
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  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-787"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2024-26736 (GCVE-0-2024-26736)

Vulnerability from cvelistv5 – Published: 2024-04-03 17:00 – Updated: 2026-08-05 11:26

Title

afs: Increase buffer size in afs_update_volume_status()

Summary

Severity

8.1 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-04-05 17:35 UTC

Assigner

Linux CNA under the mitre root

CNA scorecard D 54/100 over 6618 records in the last 180 days details

References

8 references

URL	Tags
https://git.kernel.org/stable/c/5c27d85a69fa16a08…
https://git.kernel.org/stable/c/d9b5e2b7a81968503…
https://git.kernel.org/stable/c/e56662160fc24d28c…
https://git.kernel.org/stable/c/e8530b170e4640172…
https://git.kernel.org/stable/c/6e6065dd25b661420…
https://git.kernel.org/stable/c/d34a5e57632bb5ff8…
https://git.kernel.org/stable/c/6ea38e2aeb72349ca…
https://lists.debian.org/debian-lts-announce/2024…	x_transferred

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: d2ddc776a4581d900fc3bdc7803b403daae64d88 , < 5c27d85a69fa16a08813ba37ddfb4bbc9a1ed6b5 (git) Affected: d2ddc776a4581d900fc3bdc7803b403daae64d88 , < d9b5e2b7a8196850383c70d099bfd39e81ab6637 (git) Affected: d2ddc776a4581d900fc3bdc7803b403daae64d88 , < e56662160fc24d28cb75ac095cc6415ae1bda43e (git) Affected: d2ddc776a4581d900fc3bdc7803b403daae64d88 , < e8530b170e464017203e3b8c6c49af6e916aece1 (git) Affected: d2ddc776a4581d900fc3bdc7803b403daae64d88 , < 6e6065dd25b661420fac19c34282b6c626fcd35e (git) Affected: d2ddc776a4581d900fc3bdc7803b403daae64d88 , < d34a5e57632bb5ff825196ddd9a48ca403626dfa (git) Affected: d2ddc776a4581d900fc3bdc7803b403daae64d88 , < 6ea38e2aeb72349cad50e38899b0ba6fbcb2af3d (git)
Linux	Linux	Affected: 4.15 Unaffected: 0 , < 4.15 (semver) Unaffected: 5.4.270 , ≤ 5.4.* (semver) Unaffected: 5.10.211 , ≤ 5.10.* (semver) Unaffected: 5.15.150 , ≤ 5.15.* (semver) Unaffected: 6.1.80 , ≤ 6.1.* (semver) Unaffected: 6.6.19 , ≤ 6.6.* (semver) Unaffected: 6.7.7 , ≤ 6.7.* (semver) Unaffected: 6.8 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2024-26736",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-04-05T17:35:04.677455Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-06-04T17:48:32.562Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
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          "dateUpdated": "2024-08-02T00:14:12.959Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
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            "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"
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        "title": "CVE Program Container"
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "version": "4.15"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.211",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.150",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.80",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.19",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.7.*",
              "status": "unaffected",
              "version": "6.7.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.8",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
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          "nodes": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.270",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.211",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "5.15.150",
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                  "vulnerable": true
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              "negate": false,
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nafs: Increase buffer size in afs_update_volume_status()\n\nThe max length of volume-\u003evid value is 20 characters.\nSo increase idbuf[] size up to 24 to avoid overflow.\n\nFound by Linux Verification Center (linuxtesting.org) with SVACE.\n\n[DH: Actually, it\u0027s 20 + NUL, so increase it to 24 and use snprintf()]"
        }
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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          "scenarios": [
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              "lang": "en",
              "value": "AV:N - The value formatted into the undersized stack buffer originates entirely from a remote Volume Location server\u0027s `VL.GetEntryByNameU` reply (`ntohl(uvldb-\u003evolumeId[i])`, fs/afs/vlclient.c:77), and the call into `afs_update_volume_status()` is itself forced on demand by a remote fileserver returning VNOVOL/VMOVED abort codes (fs/afs/rotate.c:247,387). AFS VL traffic is unauthenticated rxrpc over UDP, so a rogue cell server or an on-path response spoofer reaches this code across the network.\nAC:H - Overflowing `idbuf[16]` requires `volume-\u003evid` to exceed 10 decimal digits, but the on-wire `volumeId[]` field is `__be32` (fs/afs/afs_vl.h:123) and is the sole source of `volume-\u003evid`, capping it at `4294967295`. The wire-format width is a hard constraint entirely beyond the attacker\u0027s control, so no attainable input triggers the write.\nPR:N - The attacker is the VL server (or a network entity spoofing its unauthenticated replies) and holds no account, credential, or capability on the target host. No local privilege on the victim is consumed anywhere along the `afs_select_fileserver` \u2192 `afs_check_volume_status` \u2192 `afs_update_volume_status` path.\nUI:N - On a configured AFS client `/afs` is already mounted at boot, and the volume-status refresh fires from routine background revalidation and from server-supplied VMOVED/VNOVOL responses without any victim action. The attacker drives the update himself via the fileserver\u0027s abort codes.\nS:U - Any corruption is confined to the AFS client\u0027s own kernel stack frame within the same kernel security authority. No VM, hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - A stack write past `idbuf` overwrites the adjacent locals in the same frame \u2014 the `new`/`old`/`discard`/`vldb` pointers and `idsz` \u2014 and corrupting `vldb` or `idsz` redirects the subsequent `memcmp`/`memcpy` of the volume name and the `afs_alloc_server_list()` walk, yielding an attacker-influenced kernel read. Per kernel guidance, memory corruption leverageable for disclosure is scored High.\nI:H - This is an out-of-bounds stack write, which per kernel guidance is High: the clobbered pointers are dereferenced and written through immediately afterwards (`memcpy(volume-\u003ename, vldb-\u003ename, AFS_MAXVOLNAME)`, `rcu_assign_pointer(volume-\u003eservers, new)`), giving a path to controlled kernel memory modification and control-flow influence.\nA:H - On any stack-protector kernel the 5-byte overrun smashes the canary and `__stack_chk_fail()` panics the machine; without it, the corrupted `vldb`/`new`/`old` pointers are dereferenced and freed (`kfree(vldb)`, `afs_put_serverlist()`), producing an oops. Either outcome is a full kernel crash."
            }
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        }
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        "dateUpdated": "2026-08-05T11:26:55.027Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        },
        {
          "url": "https://git.kernel.org/stable/c/6ea38e2aeb72349cad50e38899b0ba6fbcb2af3d"
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      "title": "afs: Increase buffer size in afs_update_volume_status()",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-26736",
    "datePublished": "2024-04-03T17:00:22.693Z",
    "dateReserved": "2024-02-19T14:20:24.166Z",
    "dateUpdated": "2026-08-05T11:26:55.027Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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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FKIE_CVE-2024-26736

CVE-2024-26736 (GCVE-0-2024-26736)

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