{"metadata": {"vulnerability": "CVE-2026-99033", "count": 33, "kinds": {"milestone": 8, "sighting": 1, "kev": 0, "other": 24}}, "data": [{"timestamp": "2026-09-25T10:25:14.387Z", "date_only": false, "value": "2026-09-25T10:25:14.387Z", "kind": "milestone", "label": "Reserved", "source": "cvelistv5", "record": "CVE-2026-99033", "field": "cveMetadata.dateReserved"}, {"timestamp": "2026-10-23T12:21:37.662Z", "date_only": false, "value": "2026-10-23T12:21:37.662Z", "kind": "milestone", "label": "Published", "source": "cvelistv5", "record": "CVE-2026-99033", "field": "cveMetadata.datePublished", "metric_role": "disclosure", "metric_basis": "recorded_event"}, {"timestamp": "2026-10-23T13:17:00Z", "date_only": false, "value": "2026-10-23T13:17:00Z", "kind": "milestone", "label": "Published", "source": "osv_ubuntu \u00b7 UBUNTU-CVE-2026-99033", "record": "UBUNTU-CVE-2026-99033", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-10-23T13:17:26Z", "date_only": false, "value": "2026-10-23T13:17:26Z", "kind": "other", "label": "Nvd published at", "source": "github \u00b7 GHSA-4CRX-J28M-6WRF", "record": "GHSA-4CRX-J28M-6WRF", "field": "database_specific.nvd_published_at", "linked_record": true}, {"timestamp": "2026-10-23T13:17:26.443Z", "date_only": false, "value": "2026-10-23T13:17:26.443", "kind": "milestone", "label": "Published", "source": "fkie_nvd \u00b7 FKIE_CVE-2026-99033", "record": "FKIE_CVE-2026-99033", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-10-23T14:02:20.666Z", "date_only": false, "value": "2026-10-23T14:02:20.666448Z", "kind": "sighting", "label": "Seen", "source": "https://infosec.exchange/users/cve/statuses/117490590689164712", "record": "CVE-2026-99033", "field": "creation_timestamp", "uuid": "812ac6d3-f574-4c7d-a040-3cff625fc719", "content": "CVE-2026-99033 net/packet: guard the ll header push in packet_rcv_spkt() In the Linux kernel, the following vulnerability has been resolved:\nnet/packet: guard the ll header push in packet_rcv_spkt()\npacket_rcv_spkt() restores the link layer header with\n\tskb_push(skb, skb->data - skb_mac_header(skb));\nThat subtraction is only meaningful when the device actually has a linklayer header.  packet_rcv() and tpacket_rcv() both wrap it indev_has_header(), which is also the predicate the block comment at thetop of the file states the restore in terms of; packet_rcv_spkt() doesnot.  commit d549699048b4 (\"net/packet: fix packet receive on L3devices without visible hard header\") introduced the helper and changedthe two call sites, and this one stayed behind.\nA device without a visible ll header can leave skb->mac_header at the0xFFFF sentinel that __alloc_skb() initialises it to.  A CAN skb does:init_can_skb() sets pkt_type and ip_summed but does not reset theheaders, and commit 9f10374bb024 (\"can: remove private CAN skbheadroom infrastructure\") dropped the skb_reset_*_header() calls thatused to be there.  skb_mac_header() is then 0xFFFF, the length becomesa large negative number and skb_push() reports it throughskb_under_panic() -- from softirq context, so it is a full system paniceven with panic_on_oops=0:\n  skbuff: skb_under_panic: text:ffffffff8bd21bc1 len:-65455 put:-65471 head:... data:... tail:0x50 end:0x180 dev:can0  kernel BUG at net/core/skbuff.c:214!  RIP: 0010:skb_panic+0x50/0x60  Call Trace:   <IRQ>   skb_push+0x38/0x40   packet_rcv_spkt+0xe1/0x170   __netif_receive_skb_core.constprop.0+0x7e8/0xd30   ...  Kernel panic - not syncing: Fatal exception in interrupt\nThe socket type is reachable: packet_create() accepts SOCK_PACKETalongside SOCK_RAW and SOCK_DGRAM behind the same CAP_NET_RAW check,and neither the socket length nor a capability check keeps it awayfrom a CAN interface.\nThe missing skb_reset_*_header() calls in init_can_skb() are aregression in their own right and are being fixed separately, but apacket socket should not turn a link layer that did not initialise itsmac header into a kernel panic.  Guard the push the way the other tworeceive paths do.\nTested on v7.3-rc5 under QEMU with a slcan device on a pty, which isthe driver RX path: vcan does not reproduce it, because can_send()resets the headers on the way out.  One SOCK_PACKET socket bound tocan0 and one frame written into the line discipline panics anunpatched kernel with the trace above; the same image with this patchprints no panic and powers off normally.  Both kernels are this tree,defconfig plus CONFIG_CAN_SLCAN=y, differing only in this hunk.\nhttps://www.cve.org/CVERecord?id=CVE-2026-99033https://git.kernel.org/stable/c/d8a24b9e1774a93943caf68d48c5e17be432220bhttps://git.kernel.org/stable/c/31c7b15b3716e8d0dad58d2c3cdf321dfd06f4behttps://git.kernel.org/stable/c/3efe0e0944157fdd2072b4dc7eb0491a317ed272https://git.kernel.org/stable/c/00fbf71e74115f7628fc0880b855434b1e70c40chttps://git.kernel.org/stable/c/28bc1ef699610ee09ce3d46a00552f5a0a0144bd#kernel #Linux#CVE_2026_99033#bot", "url": "https://infosec.exchange/users/cve/statuses/117490590689164712"}, {"timestamp": "2026-10-23T15:31:35Z", "date_only": false, "value": "2026-10-23T15:31:35Z", "kind": "milestone", "label": "Published", "source": "github \u00b7 GHSA-4CRX-J28M-6WRF", "record": "GHSA-4CRX-J28M-6WRF", "field": "published", "metric_role": "disclosure", "metric_basis": "recorded_event", "linked_record": true}, {"timestamp": "2026-10-25T01:03:57Z", "date_only": false, "value": 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