CVE-2026-64351

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A device can\ndeliver a short bulk-IN frame with skb->len 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 < 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": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/usb/kalmia.c"], "versions": [{"version": "d40261236e8e278cb1936cb5e934262971692b10", "lessThan": "391706889a5112feafdc0c68db3ecc7ed325d09c", "status": "affected", "versionType": "git"}, {"version": "d40261236e8e278cb1936cb5e934262971692b10", "lessThan": "aa4eef2cbb66ea3dfcfc24bdce798dd78a81b54b", "status": "affected", "versionType": "git"}, {"version": "d40261236e8e278cb1936cb5e934262971692b10", "lessThan": "2d04c37ed4e1d0f733ad39ec35b5a5d8818b4f4a", "status": "affected", "versionType": "git"}, {"version": "d40261236e8e278cb1936cb5e934262971692b10", "lessThan": "46ab32870d010e9a057bc5659cea22b7e728ca88", "status": "affected", "versionType": "git"}, 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"cveTags": [], "descriptions": [{"lang": "en", "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->len - (2 *\nKALMIA_HEADER_LENGTH) as a u16, guarded only by a pre-loop check that\nskb->len is at least KALMIA_HEADER_LENGTH, which is 6. A device can\ndeliver a short bulk-IN frame with skb->len 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 < 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": "CVE-2026-64351", "lastModified": "2026-11-06T17:18:50.960", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-64351", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-06T16:36:37.686661Z", "version": "2.0.3"}}]}, "published": "2026-07-25T10:17:17.407", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2d04c37ed4e1d0f733ad39ec35b5a5d8818b4f4a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/391706889a5112feafdc0c68db3ecc7ed325d09c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/46ab32870d010e9a057bc5659cea22b7e728ca88"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/47b6bcef6e679593d2e86e04ee72c46a4e2f7139"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/51e65f1d78457ea4f9513d90ab22c9dccbb35110"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/aa4eef2cbb66ea3dfcfc24bdce798dd78a81b54b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c466097d85d52f3aa200736cb4759e66d4bbf6e3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e24eb271061db384a3c3ef6f107fe515e68ef222"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: net: usb: kalmia: bound RX frame length in kalmia_rx_fixup()", "id": "2507275", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2507275"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["A flaw was found in the Linux kernel's USB Kalmia driver. An attacker with a specially crafted USB device could exploit an out-of-bounds read vulnerability in the `kalmia_rx_fixup()` function. This occurs due to an incorrect calculation of the USB packet length when processing short bulk-IN frames, leading to a memory underflow. This flaw could allow an attacker to read sensitive information from outside the intended memory buffer or potentially cause a denial of service."], "name": "CVE-2026-64351", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "impact": "important", "package_name": "erlang27", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-07-25T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64351\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64351\nhttps://lore.kernel.org/linux-cve-announce/2026072518-CVE-2026-64351-eae1@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d40261236e8e278cb1936cb5e934262971692b10,391706889a5112feafdc0c68db3ecc7ed325d09c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d40261236e8e278cb1936cb5e934262971692b10,aa4eef2cbb66ea3dfcfc24bdce798dd78a81b54b)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d40261236e8e278cb1936cb5e934262971692b10,2d04c37ed4e1d0f733ad39ec35b5a5d8818b4f4a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d40261236e8e278cb1936cb5e934262971692b10,46ab32870d010e9a057bc5659cea22b7e728ca88)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d40261236e8e278cb1936cb5e934262971692b10,c466097d85d52f3aa200736cb4759e66d4bbf6e3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d40261236e8e278cb1936cb5e934262971692b10,e24eb271061db384a3c3ef6f107fe515e68ef222)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d40261236e8e278cb1936cb5e934262971692b10,51e65f1d78457ea4f9513d90ab22c9dccbb35110)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d40261236e8e278cb1936cb5e934262971692b10,47b6bcef6e679593d2e86e04ee72c46a4e2f7139)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "3.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.261,5.10.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.212,5.15.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.178,6.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.145,6.6.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.96,6.12.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.39,6.18.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.4,7.1.*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-07-25T14:45:03.401200+00:00", "updated": "2026-09-03T22:30:10.889216+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}