{"id":"CVE-2026-64540","revision":null,"records":[{"revision":"929958fa7db64f6da5508c7137bab94e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-64540","aliases":[],"title":"usbnet: gl620a: fix out-of-bounds read in genelink_rx_fixup()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nusbnet: gl620a: fix out-of-bounds read in genelink_rx_fixup()\n\ngenelink_rx_fixup() splits an aggregated RX frame into its individual\npackets, using a per-packet length taken from device-supplied data. That\nlength is only bounded by GL_MAX_PACKET_LEN (1514); it is never compared\nagainst how many bytes were actually received.\n\nA malicious GeneLink (GL620A) device can therefore send a short URB whose\nheader claims packet_count > 1 and a first packet of up to 1514 bytes.\n\n\tskb_put_data(gl_skb, packet->packet_data, size);\n\nthen copies past the end of the receive buffer and hands the adjacent slab\ncontents up the network stack, an out-of-bounds read that leaks kernel heap.\nNo privilege is required: the path runs in the usbnet RX softirq as soon as\nthe interface is up.\n\n BUG: KASAN: slab-out-of-bounds in genelink_rx_fixup (drivers/net/usb/gl620a.c:112)\n Read of size 1514 at addr ffff888011309708 by task ksoftirqd/0/14\n Call Trace:\n ...\n __asan_memcpy (mm/kasan/shadow.c:105)\n genelink_rx_fixup (include/linux/skbuff.h:2814 drivers/net/usb/gl620a.c:112)\n usbnet_bh (drivers/net/usb/usbnet.c:572 drivers/net/usb/usbnet.c:1589)\n process_one_work (kernel/workqueue.c:3322)\n bh_worker (kernel/workqueue.c:3405)\n tasklet_action (kernel/softirq.c:965)\n handle_softirqs (kernel/softirq.c:622)\n run_ksoftirqd (kernel/softirq.c:1076)\n ...\n\nskb_pull() already verifies that the requested length fits the buffer and\nreturns NULL otherwise. Move it ahead of the copy and check its result, so\na packet that overruns the received data is rejected before it is read.\nWell-formed frames, whose packets are fully present, are unaffected.","state":0,"publishedAt":"2026-07-27T20:10:33.905+00:00","modifiedAt":"2026-10-19T20:48:39.446+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"unaffected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/net/usb/gl620a.c\"\n ],\n \"versions\": [\n {\n \"version\": \"47ee3051c856cc2aa95d35d577a8cb37279d540f\",\n \"lessThan\": \"255d03551f94c7bdd86c7d9181a70b21917d829f\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"47ee3051c856cc2aa95d35d577a8cb37279d540f\",\n \"lessThan\": \"4359376e6238d89977a35086e47ca3b07f43e850\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"47ee3051c856cc2aa95d35d577a8cb37279d540f\",\n \"lessThan\": \"8624e179fa3ce23c2fbd1a198ce30764b73f054a\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"47ee3051c856cc2aa95d35d577a8cb37279d540f\",\n \"lessThan\": \"573418f7ea8f859a841417eb4b915594094fd967\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"47ee3051c856cc2aa95d35d577a8cb37279d540f\",\n \"lessThan\": \"0575599e451aff3c5329922562374a2cab25fc51\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"47ee3051c856cc2aa95d35d577a8cb37279d540f\",\n \"lessThan\": \"0a7d9c7c5f1f208c523abbb4db6aea7bc1fad3db\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"47ee3051c856cc2aa95d35d577a8cb37279d540f\",\n \"lessThan\": \"3ef79fa3860e644c8de7834fa7300e1c58f38862\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"47ee3051c856cc2aa95d35d577a8cb37279d540f\",\n \"lessThan\": \"8ff7f2a6da4fccaa5cc9be7251a24e71e29fbd1a\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n }\n ]\n }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n \"product\": \"Linux\",\n \"vendor\": \"Linux\",\n \"defaultStatus\": \"affected\",\n \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n \"programFiles\": [\n \"drivers/net/usb/gl620a.c\"\n ],\n \"versions\": [\n {\n \"version\": \"2.6.14\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"2.6.14\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.261\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.212\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.178\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.145\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.97\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.40\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1.5\",\n \"lessThanOrEqual\": \"7.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.2\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H","score":8.1,"severity":"HIGH"}],"references":["https://git.kernel.org/stable/c/255d03551f94c7bdd86c7d9181a70b21917d829f","https://git.kernel.org/stable/c/4359376e6238d89977a35086e47ca3b07f43e850","https://git.kernel.org/stable/c/8624e179fa3ce23c2fbd1a198ce30764b73f054a","https://git.kernel.org/stable/c/573418f7ea8f859a841417eb4b915594094fd967","https://git.kernel.org/stable/c/0575599e451aff3c5329922562374a2cab25fc51","https://git.kernel.org/stable/c/0a7d9c7c5f1f208c523abbb4db6aea7bc1fad3db","https://git.kernel.org/stable/c/3ef79fa3860e644c8de7834fa7300e1c58f38862","https://git.kernel.org/stable/c/8ff7f2a6da4fccaa5cc9be7251a24e71e29fbd1a"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-64540","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-64540","identifiers":["CVE-2026-64540"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EPSS backfill.","generation":"2026-11-08T16:11:32.8669692+00:00","complete":true,"records":1096,"lastAttemptAt":"2026-11-08T16:11:32.8669692+00:00","lastSuccessAt":"2026-11-08T16:11:33.0716184+00:00","error":null,"lastVerifiedAt":"2026-11-08T16:11:33.0716198+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-7f3b9e580ebe475bb44f224af7ef38ba","complete":true,"records":13666,"lastAttemptAt":"2026-11-08T16:11:35.0811636+00:00","lastSuccessAt":"2026-11-08T16:11:35.077+00:00","error":null,"lastVerifiedAt":"2026-11-08T16:11:35.077+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13706,"expectedIdentifiers":13706,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-980593e6977a6d1b4fb1eed5a1ffe88a468736f89f0a06f710924ad59132c023","complete":true,"records":9914,"lastAttemptAt":"2026-11-08T16:11:32.7092062+00:00","lastSuccessAt":"2026-11-08T11:07:07.068788+00:00","error":null,"lastVerifiedAt":"2026-11-08T16:11:32.7092062+00:00","snapshotPublishedAt":"2026-11-08T11:02:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-fde804134ecdda0ddd5ff5c26ee1fff5a6fa659311f7ef2e51c6ad54964db0e2","complete":true,"records":1971,"lastAttemptAt":"2026-11-08T16:11:32.0361288+00:00","lastSuccessAt":"2026-11-06T19:03:17.0399903+00:00","error":null,"lastVerifiedAt":"2026-11-08T16:11:32.0361288+00:00","snapshotPublishedAt":"2026-11-06T18:17:57+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-964c14035e6f0f6478b2870fad6a7ef9f6045876d4a12af2c2e514521e54b6af","complete":true,"records":3055,"lastAttemptAt":"2026-11-08T16:11:32.8190262+00:00","lastSuccessAt":"2026-11-08T11:07:12.1927025+00:00","error":null,"lastVerifiedAt":"2026-11-08T16:11:32.8190262+00:00","snapshotPublishedAt":"2026-11-08T11:02:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-f8647d7ba64b1ba0dfdc7130944766d5b36d5b77d18fff0c79e651a4cff3c2b9","complete":true,"records":231293,"lastAttemptAt":"2026-11-08T16:11:32.2222906+00:00","lastSuccessAt":"2026-11-08T11:06:56.2918717+00:00","error":null,"lastVerifiedAt":"2026-11-08T16:11:32.2222906+00:00","snapshotPublishedAt":"2026-11-08T11:02:50+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}