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

Vulnerability from cvelistv5 – Published: 2026-08-10 11:59 – Updated: 2026-08-19 16:30
VLAI
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
References
Impacted products
Vendor Product Version CPE status
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)
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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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      "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"
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        {
          "url": "https://git.kernel.org/stable/c/0f71f852a96af9685858ce59fda34ecbf85c283d"
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      ],
      "title": "phonet: pep: fix use-after-free in pep_get_sb()",
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    "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"
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  "dataVersion": "5.2",
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      "date": "2026-08-20",
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There are better\\nways to solve this, but, this is the less instrusive one.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/phonet/pep.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"9641458d3ec42def729fde64669abf07f3220cd5\",\"lessThan\":\"c4a52cb4da8d57d060b1d52085d25147a238dac2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"9641458d3ec42def729fde64669abf07f3220cd5\",\"lessThan\":\"df198743859fefba2f824115f8151dd62d7ad6d8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"9641458d3ec42def729fde64669abf07f3220cd5\",\"lessThan\":\"1d81e19fc57a5ee55b4497d01bc0510d76fb9578\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"9641458d3ec42def729fde64669abf07f3220cd5\",\"lessThan\":\"8d931a75a38b9bb584a4071f5ebbd52755fc35ee\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"9641458d3ec42def729fde64669abf07f3220cd5\",\"lessThan\":\"17f78c0c0d41d738ee236eb6e841e39395188054\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"9641458d3ec42def729fde64669abf07f3220cd5\",\"lessThan\":\"a48a889b60f73edb0399a8b08284a2ab0bd0295f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"9641458d3ec42def729fde64669abf07f3220cd5\",\"lessThan\":\"25e3641beb51333bfbb155af2fd2573a61113af2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"9641458d3ec42def729fde64669abf07f3220cd5\",\"lessThan\":\"0f71f852a96af9685858ce59fda34ecbf85c283d\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/phonet/pep.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.28\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.28\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.265\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.216\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.183\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.148\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.101\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.42\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.6\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":9.8,\"baseSeverity\":\"CRITICAL\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":3.9,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/0f71f852a96af9685858ce59fda34ecbf85c283d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/17f78c0c0d41d738ee236eb6e841e39395188054\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1d81e19fc57a5ee55b4497d01bc0510d76fb9578\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/25e3641beb51333bfbb155af2fd2573a61113af2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8d931a75a38b9bb584a4071f5ebbd52755fc35ee\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a48a889b60f73edb0399a8b08284a2ab0bd0295f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c4a52cb4da8d57d060b1d52085d25147a238dac2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/df198743859fefba2f824115f8151dd62d7ad6d8\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-08-14T01:25:06+00:00",
      "cve": "CVE-2026-68144",
      "id": "CVE-2026-68144",
      "initial_release_date": "2026-08-10T11:59:08.437000+00:00",
      "product_status:known_affected": "156",
      "product_status:known_not_affected": "106",
      "product_status:under_investigation": "14",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Linux kernel Phonet: Memory corruption vulnerability in pep_get_sb() function",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-68144.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-08-18T16:56:11Z",
      "cve": "CVE-2026-68144",
      "id": "CVE-2026-68144",
      "initial_release_date": "2026-08-18T16:56:11Z",
      "product_status:known_affected": "296",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-68144",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-68144.json",
      "version": "2"
    }
  }
}



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  • 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.