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CVE-2026-72298 (GCVE-0-2026-72298)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:55 – Updated: 2026-08-17 05:42
VLAI
Title
net: qrtr: fix 32-bit integer overflow in qrtr_endpoint_post()
Summary
In the Linux kernel, the following vulnerability has been resolved: net: qrtr: fix 32-bit integer overflow in qrtr_endpoint_post() qrtr_endpoint_post() validates an incoming packet with if (!size || len != ALIGN(size, 4) + hdrlen) goto err; where size comes from the wire. On 32-bit, size_t is 32 bits and ALIGN(size, 4) wraps to 0 for size >= 0xfffffffd, so the check passes and skb_put_data(skb, data + hdrlen, size) writes past the hdrlen-sized skb and oopses the kernel. 64-bit is unaffected. This is the 32-bit residual of ad9d24c9429e2 ("net: qrtr: fix OOB Read in qrtr_endpoint_post"), which fixed only the 64-bit case. Reject any size that cannot fit the buffer before the ALIGN.
Severity
8.4 (High)
CVSS:3.1/AV:L/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: 960b08dd36de1e341e3eb43d1c547513e338f4f8 , < 3665e644ea081c4624a1637023b0de3b29f4ae04 (git)
Affected: ad9d24c9429e2159d1e279dc3a83191ccb4daf1d , < b609f7f46916c6b05585ca82455077198a23770f (git)
Affected: ad9d24c9429e2159d1e279dc3a83191ccb4daf1d , < 242408b5b763c01288adf3113cbce84378a76e1a (git)
Affected: ad9d24c9429e2159d1e279dc3a83191ccb4daf1d , < d0597074e99731fdad5593e4f6d056a3866f2cab (git)
Affected: ad9d24c9429e2159d1e279dc3a83191ccb4daf1d , < 689b7267f8632b4661879dc323e26ebb60978afb (git)
Affected: ad9d24c9429e2159d1e279dc3a83191ccb4daf1d , < 22100a8f73d4ae4f17697dae93d4e2e1d283a6ec (git)
Affected: ad9d24c9429e2159d1e279dc3a83191ccb4daf1d , < 7f72c285f6d3bf63968a0344beee8ab1b370198b (git)
Affected: ad9d24c9429e2159d1e279dc3a83191ccb4daf1d , < 20054869770c7df060c5ecee3e8bbf9029c47191 (git)
Affected: f8111c0d7ed42ede41a3d0d393b104de0730a8a6 (git)
Affected: 26b8d10703a9be45d6097946b2b4011f7dd2c56f (git)
Affected: 19892ab9c9d838e2e5a7744d36e4bb8b7c3292fe (git)
Affected: 5.10.46 , < 5.10.261 (semver)
Affected: 4.19.196 , < 4.20 (semver)
Affected: 5.4.128 , < 5.5 (semver)
Affected: 5.12.13 , < 5.13 (semver)
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Linux Linux Affected: 5.13
Unaffected: 0 , < 5.13 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (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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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qrtr: fix 32-bit integer overflow in qrtr_endpoint_post()\n\nqrtr_endpoint_post() validates an incoming packet with\n\n\tif (!size || len != ALIGN(size, 4) + hdrlen)\n\t\tgoto err;\n\nwhere size comes from the wire. On 32-bit, size_t is 32 bits and\nALIGN(size, 4) wraps to 0 for size \u003e= 0xfffffffd, so the check\npasses and skb_put_data(skb, data + hdrlen, size) writes past the\nhdrlen-sized skb and oopses the kernel. 64-bit is unaffected.\n\nThis is the 32-bit residual of ad9d24c9429e2 (\"net: qrtr: fix OOB\nRead in qrtr_endpoint_post\"), which fixed only the 64-bit case.\n\nReject any size that cannot fit the buffer before the ALIGN."
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            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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              "value": "AV:L - qrtr_endpoint_post() is only reachable via local injection paths\u2014write()/io_submit to /dev/qrtr-tun or inbound SMD/MHI frames from the on-SoC modem/coprocessor; AF_QIPCRTR sendmsg never enters this function and QRTR is not an Internet-facing protocol.\nAC:L - The attacker fully controls the wire size field and total packet length; on 32-bit kernels, setting size\u003e=0xfffffffd with len equal to the header length deterministically wraps ALIGN() to bypass validation without races or special victim state.\nPR:N - On Qualcomm deployments the primary path is QRTR_SMD/MHI, where the AP kernel accepts ipcrouter frames from the baseband without Linux credentials or QRTR authentication, so a malicious or compromised modem sender needs no AP privileges.\nUI:N - Exploitation requires delivering a single crafted QRTR packet to qrtr_endpoint_post(); no victim interaction such as mounting filesystems, opening files, or clicking prompts is needed.\nS:U - Impact is kernel heap corruption and denial of service on the application processor; it does not cross a VM/host boundary, IOMMU boundary, or other separate security authority.\nC:H - Bypassing validation causes skb_put_data() to memcpy() ~4GB from a hdrlen-sized input buffer, performing slab out-of-bounds reads of adjacent kernel heap memory that can disclose sensitive data.\nI:H - The same skb_put_data() call performs skb_put() with the wrapped size, writing far beyond the len-sized skb allocation and corrupting adjacent slab objects, enabling potential control-flow hijacking.\nA:H - The oversized skb_put_data() triggers skb_over_panic/kernel oops as documented in the fix commit, reliably crashing affected 32-bit kernels and causing denial of service."
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        "dateUpdated": "2026-08-17T05:42:31.352Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/3665e644ea081c4624a1637023b0de3b29f4ae04"
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          "url": "https://git.kernel.org/stable/c/b609f7f46916c6b05585ca82455077198a23770f"
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          "url": "https://git.kernel.org/stable/c/689b7267f8632b4661879dc323e26ebb60978afb"
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          "url": "https://git.kernel.org/stable/c/20054869770c7df060c5ecee3e8bbf9029c47191"
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      ],
      "title": "net: qrtr: fix 32-bit integer overflow in qrtr_endpoint_post()",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72298",
    "datePublished": "2026-08-15T05:55:18.529Z",
    "dateReserved": "2026-08-09T03:40:39.917Z",
    "dateUpdated": "2026-08-17T05:42:31.352Z",
    "state": "PUBLISHED"
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  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-72298",
      "date": "2026-09-05",
      "epss": "0.0018",
      "percentile": "0.07648"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-72298\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-15T06:22:02.437\",\"lastModified\":\"2026-08-17T06:18:32.700\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet: qrtr: fix 32-bit integer overflow in qrtr_endpoint_post()\\n\\nqrtr_endpoint_post() validates an incoming packet with\\n\\n\\tif (!size || len != ALIGN(size, 4) + hdrlen)\\n\\t\\tgoto err;\\n\\nwhere size comes from the wire. On 32-bit, size_t is 32 bits and\\nALIGN(size, 4) wraps to 0 for size \u003e= 0xfffffffd, so the check\\npasses and skb_put_data(skb, data + hdrlen, size) writes past the\\nhdrlen-sized skb and oopses the kernel. 64-bit is unaffected.\\n\\nThis is the 32-bit residual of ad9d24c9429e2 (\\\"net: qrtr: fix OOB\\nRead in qrtr_endpoint_post\\\"), which fixed only the 64-bit case.\\n\\nReject any size that cannot fit the buffer before the ALIGN.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/qrtr/af_qrtr.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"960b08dd36de1e341e3eb43d1c547513e338f4f8\",\"lessThan\":\"3665e644ea081c4624a1637023b0de3b29f4ae04\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ad9d24c9429e2159d1e279dc3a83191ccb4daf1d\",\"lessThan\":\"b609f7f46916c6b05585ca82455077198a23770f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ad9d24c9429e2159d1e279dc3a83191ccb4daf1d\",\"lessThan\":\"242408b5b763c01288adf3113cbce84378a76e1a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ad9d24c9429e2159d1e279dc3a83191ccb4daf1d\",\"lessThan\":\"d0597074e99731fdad5593e4f6d056a3866f2cab\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ad9d24c9429e2159d1e279dc3a83191ccb4daf1d\",\"lessThan\":\"689b7267f8632b4661879dc323e26ebb60978afb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ad9d24c9429e2159d1e279dc3a83191ccb4daf1d\",\"lessThan\":\"22100a8f73d4ae4f17697dae93d4e2e1d283a6ec\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ad9d24c9429e2159d1e279dc3a83191ccb4daf1d\",\"lessThan\":\"7f72c285f6d3bf63968a0344beee8ab1b370198b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ad9d24c9429e2159d1e279dc3a83191ccb4daf1d\",\"lessThan\":\"20054869770c7df060c5ecee3e8bbf9029c47191\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f8111c0d7ed42ede41a3d0d393b104de0730a8a6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"26b8d10703a9be45d6097946b2b4011f7dd2c56f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"19892ab9c9d838e2e5a7744d36e4bb8b7c3292fe\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.10.46\",\"lessThan\":\"5.10.261\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.19.196\",\"lessThan\":\"4.20\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.4.128\",\"lessThan\":\"5.5\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.12.13\",\"lessThan\":\"5.13\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/qrtr/af_qrtr.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.13\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.13\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.261\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.97\",\"lessThanOrEqual\":\"6.12.*\",\"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:N/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":8.4,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.5,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/20054869770c7df060c5ecee3e8bbf9029c47191\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/22100a8f73d4ae4f17697dae93d4e2e1d283a6ec\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/242408b5b763c01288adf3113cbce84378a76e1a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/3665e644ea081c4624a1637023b0de3b29f4ae04\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/689b7267f8632b4661879dc323e26ebb60978afb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7f72c285f6d3bf63968a0344beee8ab1b370198b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b609f7f46916c6b05585ca82455077198a23770f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d0597074e99731fdad5593e4f6d056a3866f2cab\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-08-18T20:49:32+00:00",
      "cve": "CVE-2026-72298",
      "id": "CVE-2026-72298",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: qrtr: fix 32-bit integer overflow in qrtr_endpoint_post()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72298.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

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.