Vulnerability-Lookup

GHSA-362P-G3RP-MXCH

Vulnerability from github – Published: 2026-08-10 15:33 – Updated: 2026-08-19 18:32

Details

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

phonet: pep: fix use-after-free in pep_get_sb()

pep_get_sb() doesn't consider that pskb_may_pull() might have relocated the skb data, and continue to access the older pointer, causing UAF.

Reproduced under KASAN:

BUG: KASAN: slab-use-after-free in pep_get_sb+0x234/0x3b0 Read of size 1 at addr ff11000105510f50 by task repro/157 pep_get_sb+0x234/0x3b0 pipe_handler_do_rcv+0x5f7/0xa10 pep_do_rcv+0x203/0x410 __sk_receive_skb+0x471/0x4a0 phonet_rcv+0x5b3/0x6c0 __netif_receive_skb+0xcc/0x1d0

Refetch the header with skb_header_pointer() after pskb_may_pull(), so the possibly stale pointer is no longer dereferenced. There are better ways to solve this, but, this is the less instrusive one.

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-2026-68144"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-10T13:20:00Z",
    "severity": "CRITICAL"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nphonet: pep: fix use-after-free in pep_get_sb()\n\npep_get_sb() doesn\u0027t consider that pskb_may_pull() might have relocated\nthe skb data, and continue to access the older pointer, causing UAF.\n\nReproduced under KASAN:\n\n  BUG: KASAN: slab-use-after-free in pep_get_sb+0x234/0x3b0\n  Read of size 1 at addr ff11000105510f50 by task repro/157\n   pep_get_sb+0x234/0x3b0\n   pipe_handler_do_rcv+0x5f7/0xa10\n   pep_do_rcv+0x203/0x410\n   __sk_receive_skb+0x471/0x4a0\n   phonet_rcv+0x5b3/0x6c0\n   __netif_receive_skb+0xcc/0x1d0\n\nRefetch the header with skb_header_pointer() after pskb_may_pull(), so\nthe possibly stale pointer is no longer dereferenced. There are better\nways to solve this, but, this is the less instrusive one.",
  "id": "GHSA-362p-g3rp-mxch",
  "modified": "2026-08-19T18:32:07Z",
  "published": "2026-08-10T15:33:37Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-68144"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0f71f852a96af9685858ce59fda34ecbf85c283d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/17f78c0c0d41d738ee236eb6e841e39395188054"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1d81e19fc57a5ee55b4497d01bc0510d76fb9578"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/25e3641beb51333bfbb155af2fd2573a61113af2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8d931a75a38b9bb584a4071f5ebbd52755fc35ee"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a48a889b60f73edb0399a8b08284a2ab0bd0295f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c4a52cb4da8d57d060b1d52085d25147a238dac2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/df198743859fefba2f824115f8151dd62d7ad6d8"
    }
  ],
  "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-2026-68144 (GCVE-0-2026-68144)

Vulnerability from cvelistv5 – Published: 2026-08-10 11:59 – Updated: 2026-08-19 16:30

Title

phonet: pep: fix use-after-free in pep_get_sb()

Summary

In the Linux kernel, the following vulnerability has been resolved: phonet: pep: fix use-after-free in pep_get_sb() pep_get_sb() doesn't consider that pskb_may_pull() might have relocated the skb data, and continue to access the older pointer, causing UAF. Reproduced under KASAN: BUG: KASAN: slab-use-after-free in pep_get_sb+0x234/0x3b0 Read of size 1 at addr ff11000105510f50 by task repro/157 pep_get_sb+0x234/0x3b0 pipe_handler_do_rcv+0x5f7/0xa10 pep_do_rcv+0x203/0x410 __sk_receive_skb+0x471/0x4a0 phonet_rcv+0x5b3/0x6c0 __netif_receive_skb+0xcc/0x1d0 Refetch the header with skb_header_pointer() after pskb_may_pull(), so the possibly stale pointer is no longer dereferenced. There are better ways to solve this, but, this is the less instrusive one.

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

8 references

URL	Tags
https://git.kernel.org/stable/c/c4a52cb4da8d57d06…
https://git.kernel.org/stable/c/df198743859fefba2…
https://git.kernel.org/stable/c/1d81e19fc57a5ee55…
https://git.kernel.org/stable/c/8d931a75a38b9bb58…
https://git.kernel.org/stable/c/17f78c0c0d41d738e…
https://git.kernel.org/stable/c/a48a889b60f73edb0…
https://git.kernel.org/stable/c/25e3641beb51333bf…
https://git.kernel.org/stable/c/0f71f852a96af9685…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 9641458d3ec42def729fde64669abf07f3220cd5 , < c4a52cb4da8d57d060b1d52085d25147a238dac2 (git) Affected: 9641458d3ec42def729fde64669abf07f3220cd5 , < df198743859fefba2f824115f8151dd62d7ad6d8 (git) Affected: 9641458d3ec42def729fde64669abf07f3220cd5 , < 1d81e19fc57a5ee55b4497d01bc0510d76fb9578 (git) Affected: 9641458d3ec42def729fde64669abf07f3220cd5 , < 8d931a75a38b9bb584a4071f5ebbd52755fc35ee (git) Affected: 9641458d3ec42def729fde64669abf07f3220cd5 , < 17f78c0c0d41d738ee236eb6e841e39395188054 (git) Affected: 9641458d3ec42def729fde64669abf07f3220cd5 , < a48a889b60f73edb0399a8b08284a2ab0bd0295f (git) Affected: 9641458d3ec42def729fde64669abf07f3220cd5 , < 25e3641beb51333bfbb155af2fd2573a61113af2 (git) Affected: 9641458d3ec42def729fde64669abf07f3220cd5 , < 0f71f852a96af9685858ce59fda34ecbf85c283d (git)
Linux	Linux	Affected: 2.6.28 Unaffected: 0 , < 2.6.28 (semver) Unaffected: 5.10.265 , ≤ 5.10.* (semver) Unaffected: 5.15.216 , ≤ 5.15.* (semver) Unaffected: 6.1.183 , ≤ 6.1.* (semver) Unaffected: 6.6.148 , ≤ 6.6.* (semver) Unaffected: 6.12.101 , ≤ 6.12.* (semver) Unaffected: 6.18.42 , ≤ 6.18.* (semver) Unaffected: 7.1.6 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/phonet/pep.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c4a52cb4da8d57d060b1d52085d25147a238dac2",
              "status": "affected",
              "version": "9641458d3ec42def729fde64669abf07f3220cd5",
              "versionType": "git"
            },
            {
              "lessThan": "df198743859fefba2f824115f8151dd62d7ad6d8",
              "status": "affected",
              "version": "9641458d3ec42def729fde64669abf07f3220cd5",
              "versionType": "git"
            },
            {
              "lessThan": "1d81e19fc57a5ee55b4497d01bc0510d76fb9578",
              "status": "affected",
              "version": "9641458d3ec42def729fde64669abf07f3220cd5",
              "versionType": "git"
            },
            {
              "lessThan": "8d931a75a38b9bb584a4071f5ebbd52755fc35ee",
              "status": "affected",
              "version": "9641458d3ec42def729fde64669abf07f3220cd5",
              "versionType": "git"
            },
            {
              "lessThan": "17f78c0c0d41d738ee236eb6e841e39395188054",
              "status": "affected",
              "version": "9641458d3ec42def729fde64669abf07f3220cd5",
              "versionType": "git"
            },
            {
              "lessThan": "a48a889b60f73edb0399a8b08284a2ab0bd0295f",
              "status": "affected",
              "version": "9641458d3ec42def729fde64669abf07f3220cd5",
              "versionType": "git"
            },
            {
              "lessThan": "25e3641beb51333bfbb155af2fd2573a61113af2",
              "status": "affected",
              "version": "9641458d3ec42def729fde64669abf07f3220cd5",
              "versionType": "git"
            },
            {
              "lessThan": "0f71f852a96af9685858ce59fda34ecbf85c283d",
              "status": "affected",
              "version": "9641458d3ec42def729fde64669abf07f3220cd5",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/phonet/pep.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.28"
            },
            {
              "lessThan": "2.6.28",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.148",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.101",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.6",
              "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": "5.10.265",
                  "versionStartIncluding": "2.6.28",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.216",
                  "versionStartIncluding": "2.6.28",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.183",
                  "versionStartIncluding": "2.6.28",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.148",
                  "versionStartIncluding": "2.6.28",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.101",
                  "versionStartIncluding": "2.6.28",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.42",
                  "versionStartIncluding": "2.6.28",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.6",
                  "versionStartIncluding": "2.6.28",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "2.6.28",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nphonet: pep: fix use-after-free in pep_get_sb()\n\npep_get_sb() doesn\u0027t consider that pskb_may_pull() might have relocated\nthe skb data, and continue to access the older pointer, causing UAF.\n\nReproduced under KASAN:\n\n  BUG: KASAN: slab-use-after-free in pep_get_sb+0x234/0x3b0\n  Read of size 1 at addr ff11000105510f50 by task repro/157\n   pep_get_sb+0x234/0x3b0\n   pipe_handler_do_rcv+0x5f7/0xa10\n   pep_do_rcv+0x203/0x410\n   __sk_receive_skb+0x471/0x4a0\n   phonet_rcv+0x5b3/0x6c0\n   __netif_receive_skb+0xcc/0x1d0\n\nRefetch the header with skb_header_pointer() after pskb_may_pull(), so\nthe possibly stale pointer is no longer dereferenced. There are better\nways to solve this, but, this is the less instrusive one."
        }
      ],
      "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 bug is hit in phonet_rcv() via __netif_receive_skb() when processing inbound Phonet pipe packets on a netdev; on modem-equipped phones this path is reachable from the cellular/BT-facing modem link without local access.\nAC:L - The attacker fully controls crafted TLV sb_len values in Phonet pipe messages to deterministically force pskb_may_pull() skb head reallocation; no race or victim-specific state beyond an existing/connecting pipe socket is required.\nPR:N - Exploitation requires only delivering a malformed Phonet packet to a listening/connecting pipe endpoint; phonet_rcv() performs no authentication or capability checks before delivering to pep_do_rcv() and pep_get_sb().\nUI:N - No end-user action is needed; triggering only requires a background phonet pipe listener or an in-progress connect/accept on affected Nokia/modem platforms where phonet daemons run continuously.\nS:U - Impact is confined to kernel memory/process integrity on the affected host; successful exploitation yields local privilege escalation within the same kernel security domain, not a cross-VM or cross-container boundary escape.\nC:H - Confirmed slab use-after-free read in pep_get_sb(); stale post-realloc pointer dereference can leak adjacent heap contents and is a standard primitive for arbitrary kernel memory disclosure.\nI:H - Use-after-free on skb header memory enables heap grooming and control of freed object contents, providing a well-established path to arbitrary kernel writes and code execution beyond the immediate one-byte read.\nA:H - KASAN reproduced a slab use-after-free oops in pep_get_sb() during packet receive; even without full exploit development, malformed Phonet pipe packets can reliably panic or hang the kernel on affected systems."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:30:06.882Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c4a52cb4da8d57d060b1d52085d25147a238dac2"
        },
        {
          "url": "https://git.kernel.org/stable/c/df198743859fefba2f824115f8151dd62d7ad6d8"
        },
        {
          "url": "https://git.kernel.org/stable/c/1d81e19fc57a5ee55b4497d01bc0510d76fb9578"
        },
        {
          "url": "https://git.kernel.org/stable/c/8d931a75a38b9bb584a4071f5ebbd52755fc35ee"
        },
        {
          "url": "https://git.kernel.org/stable/c/17f78c0c0d41d738ee236eb6e841e39395188054"
        },
        {
          "url": "https://git.kernel.org/stable/c/a48a889b60f73edb0399a8b08284a2ab0bd0295f"
        },
        {
          "url": "https://git.kernel.org/stable/c/25e3641beb51333bfbb155af2fd2573a61113af2"
        },
        {
          "url": "https://git.kernel.org/stable/c/0f71f852a96af9685858ce59fda34ecbf85c283d"
        }
      ],
      "title": "phonet: pep: fix use-after-free in pep_get_sb()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-68144",
    "datePublished": "2026-08-10T11:59:08.437Z",
    "dateReserved": "2026-07-30T09:28:09.370Z",
    "dateUpdated": "2026-08-19T16:30:06.882Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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.

Action not permitted

GHSA-362P-G3RP-MXCH

CVE-2026-68144 (GCVE-0-2026-68144)

Tags

Sightings

Nomenclature