Vulnerability-Lookup

CVE-2026-64351 (GCVE-0-2026-64351)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:50 – Updated: 2026-07-25 08:50

Title

net: usb: kalmia: bound RX frame length in kalmia_rx_fixup()

Summary

In the Linux kernel, the following vulnerability has been resolved: net: usb: kalmia: bound RX frame length in kalmia_rx_fixup() kalmia_rx_fixup() computes usb_packet_length = skb->len - (2 * KALMIA_HEADER_LENGTH) as a u16, guarded only by a pre-loop check that skb->len is at least KALMIA_HEADER_LENGTH, which is 6. A device can deliver a short bulk-IN frame with skb->len in the 6 to 11 range, or leave a short trailing remainder on a later loop iteration. Either case underflows usb_packet_length to about 65530. That bypasses the usb_packet_length < ether_packet_length truncation path. The device-supplied ether_packet_length, a le16 up to 65535 read from header_start[2], then drives a memcmp() and the following skb_trim() and skb_pull() past the end of the rx buffer. The rx buffer is hard_mtu * 10, which is 14000 bytes. That is an out of bounds read. Require both the start and end framing headers to be present before subtracting them, on every loop iteration.

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/391706889a5112fea…
https://git.kernel.org/stable/c/aa4eef2cbb66ea3df…
https://git.kernel.org/stable/c/2d04c37ed4e1d0f73…
https://git.kernel.org/stable/c/46ab32870d010e9a0…
https://git.kernel.org/stable/c/c466097d85d52f3aa…
https://git.kernel.org/stable/c/e24eb271061db384a…
https://git.kernel.org/stable/c/51e65f1d78457ea4f…
https://git.kernel.org/stable/c/47b6bcef6e679593d…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: d40261236e8e278cb1936cb5e934262971692b10 , < 391706889a5112feafdc0c68db3ecc7ed325d09c (git) Affected: d40261236e8e278cb1936cb5e934262971692b10 , < aa4eef2cbb66ea3dfcfc24bdce798dd78a81b54b (git) Affected: d40261236e8e278cb1936cb5e934262971692b10 , < 2d04c37ed4e1d0f733ad39ec35b5a5d8818b4f4a (git) Affected: d40261236e8e278cb1936cb5e934262971692b10 , < 46ab32870d010e9a057bc5659cea22b7e728ca88 (git) Affected: d40261236e8e278cb1936cb5e934262971692b10 , < c466097d85d52f3aa200736cb4759e66d4bbf6e3 (git) Affected: d40261236e8e278cb1936cb5e934262971692b10 , < e24eb271061db384a3c3ef6f107fe515e68ef222 (git) Affected: d40261236e8e278cb1936cb5e934262971692b10 , < 51e65f1d78457ea4f9513d90ab22c9dccbb35110 (git) Affected: d40261236e8e278cb1936cb5e934262971692b10 , < 47b6bcef6e679593d2e86e04ee72c46a4e2f7139 (git)
Linux	Linux	Affected: 3.0 Unaffected: 0 , < 3.0 (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: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: kalmia: bound RX frame length in kalmia_rx_fixup()\n\nkalmia_rx_fixup() computes usb_packet_length = skb-\u003elen - (2 *\nKALMIA_HEADER_LENGTH) as a u16, guarded only by a pre-loop check that\nskb-\u003elen is at least KALMIA_HEADER_LENGTH, which is 6. A device can\ndeliver a short bulk-IN frame with skb-\u003elen in the 6 to 11 range, or\nleave a short trailing remainder on a later loop iteration. Either case\nunderflows usb_packet_length to about 65530.\n\nThat bypasses the usb_packet_length \u003c ether_packet_length truncation path.\nThe device-supplied ether_packet_length, a le16 up to 65535 read from\nheader_start[2], then drives a memcmp() and the following skb_trim() and\nskb_pull() past the end of the rx buffer. The rx buffer is hard_mtu * 10,\nwhich is 14000 bytes. That is an out of bounds read.\n\nRequire both the start and end framing headers to be present before\nsubtracting them, on every loop iteration."
        }
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Either case\\nunderflows usb_packet_length to about 65530.\\n\\nThat bypasses the usb_packet_length \u003c ether_packet_length truncation path.\\nThe device-supplied ether_packet_length, a le16 up to 65535 read from\\nheader_start[2], then drives a memcmp() and the following skb_trim() and\\nskb_pull() past the end of the rx buffer. The rx buffer is hard_mtu * 10,\\nwhich is 14000 bytes. That is an out of bounds read.\\n\\nRequire both the start and end framing headers to be present before\\nsubtracting them, on every loop iteration.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/usb/kalmia.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"d40261236e8e278cb1936cb5e934262971692b10\",\"lessThan\":\"391706889a5112feafdc0c68db3ecc7ed325d09c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d40261236e8e278cb1936cb5e934262971692b10\",\"lessThan\":\"aa4eef2cbb66ea3dfcfc24bdce798dd78a81b54b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d40261236e8e278cb1936cb5e934262971692b10\",\"lessThan\":\"2d04c37ed4e1d0f733ad39ec35b5a5d8818b4f4a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d40261236e8e278cb1936cb5e934262971692b10\",\"lessThan\":\"46ab32870d010e9a057bc5659cea22b7e728ca88\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d40261236e8e278cb1936cb5e934262971692b10\",\"lessThan\":\"c466097d85d52f3aa200736cb4759e66d4bbf6e3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d40261236e8e278cb1936cb5e934262971692b10\",\"lessThan\":\"e24eb271061db384a3c3ef6f107fe515e68ef222\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d40261236e8e278cb1936cb5e934262971692b10\",\"lessThan\":\"51e65f1d78457ea4f9513d90ab22c9dccbb35110\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d40261236e8e278cb1936cb5e934262971692b10\",\"lessThan\":\"47b6bcef6e679593d2e86e04ee72c46a4e2f7139\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/usb/kalmia.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"3.0\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"3.0\",\"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\":\"6.12.96\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.39\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.4\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2d04c37ed4e1d0f733ad39ec35b5a5d8818b4f4a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/391706889a5112feafdc0c68db3ecc7ed325d09c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/46ab32870d010e9a057bc5659cea22b7e728ca88\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/47b6bcef6e679593d2e86e04ee72c46a4e2f7139\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/51e65f1d78457ea4f9513d90ab22c9dccbb35110\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/aa4eef2cbb66ea3dfcfc24bdce798dd78a81b54b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c466097d85d52f3aa200736cb4759e66d4bbf6e3\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/e24eb271061db384a3c3ef6f107fe515e68ef222\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
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      "cve": "CVE-2026-64351",
      "id": "CVE-2026-64351",
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      "product_status:known_affected": "260",
      "product_status:known_not_affected": "15",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: usb: kalmia: bound RX frame length in kalmia_rx_fixup()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64351.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-07-25T16:01:12Z",
      "cve": "CVE-2026-64351",
      "id": "CVE-2026-64351",
      "initial_release_date": "2026-07-25T16:01:12Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64351",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64351.json",
      "version": "2"
    }
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}

GHSA-8QC4-XRRP-XX3V

Vulnerability from github – Published: 2026-07-25 12:31 – Updated: 2026-07-25 12:31

Details

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

net: usb: kalmia: bound RX frame length in kalmia_rx_fixup()

kalmia_rx_fixup() computes usb_packet_length = skb->len - (2 * KALMIA_HEADER_LENGTH) as a u16, guarded only by a pre-loop check that skb->len is at least KALMIA_HEADER_LENGTH, which is 6. A device can deliver a short bulk-IN frame with skb->len in the 6 to 11 range, or leave a short trailing remainder on a later loop iteration. Either case underflows usb_packet_length to about 65530.

That bypasses the usb_packet_length < ether_packet_length truncation path. The device-supplied ether_packet_length, a le16 up to 65535 read from header_start[2], then drives a memcmp() and the following skb_trim() and skb_pull() past the end of the rx buffer. The rx buffer is hard_mtu * 10, which is 14000 bytes. That is an out of bounds read.

Require both the start and end framing headers to be present before subtracting them, on every loop iteration.

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64351"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-25T10:17:17Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: kalmia: bound RX frame length in kalmia_rx_fixup()\n\nkalmia_rx_fixup() computes usb_packet_length = skb-\u003elen - (2 *\nKALMIA_HEADER_LENGTH) as a u16, guarded only by a pre-loop check that\nskb-\u003elen is at least KALMIA_HEADER_LENGTH, which is 6. A device can\ndeliver a short bulk-IN frame with skb-\u003elen in the 6 to 11 range, or\nleave a short trailing remainder on a later loop iteration. Either case\nunderflows usb_packet_length to about 65530.\n\nThat bypasses the usb_packet_length \u003c ether_packet_length truncation path.\nThe device-supplied ether_packet_length, a le16 up to 65535 read from\nheader_start[2], then drives a memcmp() and the following skb_trim() and\nskb_pull() past the end of the rx buffer. The rx buffer is hard_mtu * 10,\nwhich is 14000 bytes. That is an out of bounds read.\n\nRequire both the start and end framing headers to be present before\nsubtracting them, on every loop iteration.",
  "id": "GHSA-8qc4-xrrp-xx3v",
  "modified": "2026-07-25T12:31:32Z",
  "published": "2026-07-25T12:31:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64351"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2d04c37ed4e1d0f733ad39ec35b5a5d8818b4f4a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/391706889a5112feafdc0c68db3ecc7ed325d09c"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/46ab32870d010e9a057bc5659cea22b7e728ca88"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/47b6bcef6e679593d2e86e04ee72c46a4e2f7139"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/51e65f1d78457ea4f9513d90ab22c9dccbb35110"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/aa4eef2cbb66ea3dfcfc24bdce798dd78a81b54b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c466097d85d52f3aa200736cb4759e66d4bbf6e3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e24eb271061db384a3c3ef6f107fe515e68ef222"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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.

Action not permitted

CVE-2026-64351 (GCVE-0-2026-64351)

GHSA-8QC4-XRRP-XX3V

Tags

Sightings

Nomenclature