{"id":"CVE-2026-52982","revision":null,"records":[{"revision":"31ce5394bc4f420a84f45632a71158a0","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-52982","aliases":[],"title":"net: usb: rtl8150: fix use-after-free in rtl8150_start_xmit()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: rtl8150: fix use-after-free in rtl8150_start_xmit()\n\nsyzbot reported a KASAN slab-use-after-free read in rtl8150_start_xmit()\nwhen accessing skb->len for tx statistics after usb_submit_urb() has\nbeen called:\n\n BUG: KASAN: slab-use-after-free in rtl8150_start_xmit+0x71f/0x760\n drivers/net/usb/rtl8150.c:712\n Read of size 4 at addr ffff88810eb7a930 by task kworker/0:4/5226\n\nThe URB completion handler write_bulk_callback() frees the skb via\ndev_kfree_skb_irq(dev->tx_skb). The URB may complete on another CPU\nin softirq context before usb_submit_urb() returns in the submitter,\nso by the time the submitter reads skb->len the skb has already been\nqueued to the per-CPU completion_queue and freed by net_tx_action():\n\n CPU A (xmit) CPU B (USB completion softirq)\n ------------ ------------------------------\n dev->tx_skb = skb;\n usb_submit_urb() --+\n |-------> write_bulk_callback()\n | dev_kfree_skb_irq(dev->tx_skb)\n | net_tx_action()\n | napi_skb_cache_put() <-- free\n netdev->stats.tx_bytes |\n += skb->len; <-- UAF read\n\nFix it by caching skb->len before submitting the URB and using the\ncached value when updating the tx_bytes counter.\n\nThe pre-existing tx_bytes semantics are preserved: the counter tracks\nthe original frame length (skb->len), not the ETH_ZLEN/USB-alignment\npadded \"count\" value that is handed to the device. Changing that\nwould be a user-visible accounting change and is out of scope for\nthis UAF fix.","state":0,"publishedAt":"2026-06-24T16:28:57.763+00:00","modifiedAt":"2026-10-19T19:47:11.935+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/rtl8150.c\"\n ],\n \"versions\": [\n {\n \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n \"lessThan\": \"5af290c86fa81ddbc86a08d54229af5daa40c6a4\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n \"lessThan\": \"24831b0b2ada9fef18d1f486b7b7c444ee5ba637\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n \"lessThan\": \"423b5b86e14e190f6e3161eb5f2ea5f908295ba7\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n \"lessThan\": \"5db090ca07b28a63fb1499690cf19a3f3adafacb\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n \"lessThan\": \"30cf9829d09ca958279c937af8e35495cd2f1e09\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n \"lessThan\": \"6999d70e0eda39af029fa1891c48f0a8832b09d5\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n \"lessThan\": \"4dd7eb94f79486b77ca6b4c8676aedbc465dc802\",\n \"status\": \"affected\",\n \"versionType\": \"git\"\n },\n {\n \"version\": \"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2\",\n \"lessThan\": \"23f0e34c64acba15cad4d23e50f41f533da195fa\",\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/rtl8150.c\"\n ],\n \"versions\": [\n {\n \"version\": \"2.6.12\",\n \"status\": \"affected\"\n },\n {\n \"version\": \"0\",\n \"lessThan\": \"2.6.12\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.10.258\",\n \"lessThanOrEqual\": \"5.10.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"5.15.209\",\n \"lessThanOrEqual\": \"5.15.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.1.175\",\n \"lessThanOrEqual\": \"6.1.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.6.141\",\n \"lessThanOrEqual\": \"6.6.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.12.91\",\n \"lessThanOrEqual\": \"6.12.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"6.18.33\",\n \"lessThanOrEqual\": \"6.18.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.0.10\",\n \"lessThanOrEqual\": \"7.0.*\",\n \"status\": \"unaffected\",\n \"versionType\": \"semver\"\n },\n {\n \"version\": \"7.1\",\n \"lessThanOrEqual\": \"*\",\n \"status\": \"unaffected\",\n \"versionType\": \"original_commit_for_fix\"\n }\n ]\n }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","score":9.8,"severity":"CRITICAL"}],"references":["https://git.kernel.org/stable/c/5af290c86fa81ddbc86a08d54229af5daa40c6a4","https://git.kernel.org/stable/c/24831b0b2ada9fef18d1f486b7b7c444ee5ba637","https://git.kernel.org/stable/c/423b5b86e14e190f6e3161eb5f2ea5f908295ba7","https://git.kernel.org/stable/c/5db090ca07b28a63fb1499690cf19a3f3adafacb","https://git.kernel.org/stable/c/30cf9829d09ca958279c937af8e35495cd2f1e09","https://git.kernel.org/stable/c/6999d70e0eda39af029fa1891c48f0a8832b09d5","https://git.kernel.org/stable/c/4dd7eb94f79486b77ca6b4c8676aedbc465dc802","https://git.kernel.org/stable/c/23f0e34c64acba15cad4d23e50f41f533da195fa"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-52982","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-52982","identifiers":["CVE-2026-52982"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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