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CVE-2026-72357 (GCVE-0-2026-72357)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:55 – Updated: 2026-08-17 05:43
VLAI
Title
uprobes/x86: Use proper mm_struct in __in_uprobe_trampoline
Summary
In the Linux kernel, the following vulnerability has been resolved: uprobes/x86: Use proper mm_struct in __in_uprobe_trampoline In the unregister path we use __in_uprobe_trampoline check with current->mm for the VMA lookup, which is wrong, because we are in the tracer context, not the traced process. Add mm_struct pointer argument to __in_uprobe_trampoline and changing related callers to pass proper mm_struct pointer.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: ba2bfc97b4629b10bd8d02b36e04f3932a04cac4 , < c9170c83b0e0fc2065a4c2bca5bf1f90c5880156 (git)
Affected: ba2bfc97b4629b10bd8d02b36e04f3932a04cac4 , < 1acddd3e22dd6912dd5d54f80462405a1f1e6bae (git)
Affected: ba2bfc97b4629b10bd8d02b36e04f3932a04cac4 , < 169328645663bae30e9abad4012d52441e085a71 (git)
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Linux Linux Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (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": [
            "arch/x86/kernel/uprobes.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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          "vendor": "Linux",
          "versions": [
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              "version": "0",
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              "versionType": "semver"
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              "versionType": "semver"
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              "versionType": "original_commit_for_fix"
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        }
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                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
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                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nuprobes/x86: Use proper mm_struct in __in_uprobe_trampoline\n\nIn the unregister path we use __in_uprobe_trampoline check with\ncurrent-\u003emm for the VMA lookup, which is wrong, because we are\nin the tracer context, not the traced process.\n\nAdd mm_struct pointer argument to __in_uprobe_trampoline and\nchanging related callers to pass proper mm_struct pointer."
        }
      ],
      "metrics": [
        {
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - Reachable only via local syscalls (bpf/BPF_PROG_LOAD, bpf/BPF_LINK_CREATE for uprobes, perf_event_open, close/exit) that register and tear down x86 optimized uprobes; no network, adjacent, or physical entry path exists.\nAC:L - Syzkaller reproduced this reliably by attaching a BPF uprobe-multi link and exiting; the attacker controls probe registration, target file/offset, and teardown timing, including cases where unregister runs with current-\u003emm NULL or a tracer mm.\nPR:L - Triggering requires CAP_BPF plus CAP_PERFMON for BPF uprobes or CAP_SYS_ADMIN for perf uprobes; these capabilities are grantable inside user namespaces and do not require init-namespace root under kernel CNA guidance.\nUI:N - No victim interaction is required; a local attacker fully drives uprobe attach and unregister (including process exit closing the BPF link), without needing another user to open files or perform actions.\nS:U - Impact stays within the kernel/host privilege domain (kernel panic and corruption of probed process executable text); it does not cross a VM, container, or IOMMU security boundary that would change CVSS scope.\nC:H - Using the wrong mm for trampoline VMA lookup can mis-detect optimization state and drive int3_update/unoptimize on executable pages; this class of kernel memory corruption is exploitable for information disclosure, not merely a bounded leak.\nI:H - Incorrect is_optimized decisions during unregister can invoke swbp_unoptimize/int3_update on the traced vma, writing attacker-influenced instruction bytes into executable mappings and enabling control-flow hijack in the probed process.\nA:H - Syzkaller hit a KASAN null-ptr-deref GPF in mtree_load via set_orig_insn during bpf_uprobe_multi_link_release on process exit, producing an oops and kernel panic; repeated attach/exit can deny service."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:43:15.438Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c9170c83b0e0fc2065a4c2bca5bf1f90c5880156"
        },
        {
          "url": "https://git.kernel.org/stable/c/1acddd3e22dd6912dd5d54f80462405a1f1e6bae"
        },
        {
          "url": "https://git.kernel.org/stable/c/169328645663bae30e9abad4012d52441e085a71"
        }
      ],
      "title": "uprobes/x86: Use proper mm_struct in __in_uprobe_trampoline",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72357",
    "datePublished": "2026-08-15T05:55:58.124Z",
    "dateReserved": "2026-08-09T03:40:39.921Z",
    "dateUpdated": "2026-08-17T05:43:15.438Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
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      "date": "2026-09-04",
      "epss": "0.00173",
      "percentile": "0.06888"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-72357\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-15T06:22:09.147\",\"lastModified\":\"2026-08-17T06:18:39.890\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nuprobes/x86: Use proper mm_struct in __in_uprobe_trampoline\\n\\nIn the unregister path we use __in_uprobe_trampoline check with\\ncurrent-\u003emm for the VMA lookup, which is wrong, because we are\\nin the tracer context, not the traced process.\\n\\nAdd mm_struct pointer argument to __in_uprobe_trampoline and\\nchanging related callers to pass proper mm_struct pointer.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"arch/x86/kernel/uprobes.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"ba2bfc97b4629b10bd8d02b36e04f3932a04cac4\",\"lessThan\":\"c9170c83b0e0fc2065a4c2bca5bf1f90c5880156\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ba2bfc97b4629b10bd8d02b36e04f3932a04cac4\",\"lessThan\":\"1acddd3e22dd6912dd5d54f80462405a1f1e6bae\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ba2bfc97b4629b10bd8d02b36e04f3932a04cac4\",\"lessThan\":\"169328645663bae30e9abad4012d52441e085a71\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"arch/x86/kernel/uprobes.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.18\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.18\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.40\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.5\",\"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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/169328645663bae30e9abad4012d52441e085a71\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1acddd3e22dd6912dd5d54f80462405a1f1e6bae\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c9170c83b0e0fc2065a4c2bca5bf1f90c5880156\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-19T17:16:18+00:00",
      "cve": "CVE-2026-72357",
      "id": "CVE-2026-72357",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: uprobes/x86: Use proper mm_struct in __in_uprobe_trampoline",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72357.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.


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