{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-48830", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-16T11:38:08.904Z", "datePublished": "2024-07-16T11:44:13.987Z", "dateUpdated": "2026-08-05T08:52:35.367Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:52:35.367Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncan: isotp: fix potential CAN frame reception race in isotp_rcv()\n\nWhen receiving a CAN frame the current code logic does not consider\nconcurrently receiving processes which do not show up in real world\nusage.\n\nZiyang Xuan writes:\n\nThe following syz problem is one of the scenarios. so->rx.len is\nchanged by isotp_rcv_ff() during isotp_rcv_cf(), so->rx.len equals\n0 before alloc_skb() and equals 4096 after alloc_skb(). That will\ntrigger skb_over_panic() in skb_put().\n\n=======================================================\nCPU: 1 PID: 19 Comm: ksoftirqd/1 Not tainted 5.16.0-rc8-syzkaller #0\nRIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:113\nCall Trace:\n \n skb_over_panic net/core/skbuff.c:118 [inline]\n skb_put.cold+0x24/0x24 net/core/skbuff.c:1990\n isotp_rcv_cf net/can/isotp.c:570 [inline]\n isotp_rcv+0xa38/0x1e30 net/can/isotp.c:668\n deliver net/can/af_can.c:574 [inline]\n can_rcv_filter+0x445/0x8d0 net/can/af_can.c:635\n can_receive+0x31d/0x580 net/can/af_can.c:665\n can_rcv+0x120/0x1c0 net/can/af_can.c:696\n __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5465\n __netif_receive_skb+0x24/0x1b0 net/core/dev.c:5579\n\nTherefore we make sure the state changes and data structures stay\nconsistent at CAN frame reception time by adding a spin_lock in\nisotp_rcv(). This fixes the issue reported by syzkaller but does not\naffect real world operation." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - The bug is in isotp_rcv() on the SocketCAN receive path (can_rcv → can_receive → can_rcv_filter → deliver), reached when CAN frames matching a bound ISOTP rx_id arrive on the bus—an adjacent shared-segment network like automotive/industrial CAN, analogous to Bluetooth.\nAC:L - The attacker controls both sides of the race by injecting concurrent First Frame and Consecutive Frame traffic for the same CAN ID so SMP softirq contexts run isotp_rcv_ff() and isotp_rcv_cf() in parallel, as syzkaller demonstrated; no attacker-uncontrollable condition is required.\nPR:N - Classic CAN/ISO-TP reception has no authentication; once a victim ISOTP socket is bound (normal for UDS/diagnostics), an unauthenticated bus peer can trigger the path with no host credentials or capabilities.\nUI:N - Frames are processed automatically in softirq once an ISOTP socket is bound and the CAN interface is up; no victim mount, open, or other interactive action is required.\nS:U - Corruption is confined to in-kernel ISOTP/socket heap state within the same OS security authority; there is no VM escape, IOMMU bypass, or other cross-boundary impact.\nC:H - Concurrent isotp_rcv_ff() can inflate so->rx.len past the fixed rx.buf[MAX_MSG_LENGTH+1] while isotp_rcv_cf() still writes, yielding a heap out-of-bounds access; under kernel OOB/memory-corruption guidance this supports high confidentiality impact.\nI:H - The same unlocked FF/CF race allows out-of-bounds writes into the embedded tpcon buffer and adjacent isotp_sock fields, a heap corruption primitive suitable for integrity/control-flow impact when scored conservatively.\nA:H - The documented race makes alloc_skb()/skb_put() use an inconsistent so->rx.len and triggers skb_over_panic()/BUG in softirq, which is a full kernel availability failure that an adjacent peer can repeat at will." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/can/isotp.c" ], "versions": [ { "version": "e057dd3fc20ffb3d7f150af46542a51b59b90127", "lessThan": "7b53d2204ce79b27a878074a77d64f40ec21dbca", "status": "affected", "versionType": "git" }, { "version": "e057dd3fc20ffb3d7f150af46542a51b59b90127", "lessThan": "f90cc68f9f4b5d8585ad5d0a206a9d37ac299ef3", "status": "affected", "versionType": "git" }, { "version": "e057dd3fc20ffb3d7f150af46542a51b59b90127", "lessThan": "5b068f33bc8acfcfd5ea7992a2dafb30d89bad30", "status": "affected", "versionType": "git" }, { "version": "e057dd3fc20ffb3d7f150af46542a51b59b90127", "lessThan": "7c759040c1dd03954f650f147ae7175476d51314", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/can/isotp.c" ], "versions": [ { "version": "5.10", "status": "affected" }, { "version": "0", "lessThan": "5.10", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.101", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.24", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.16.10", "lessThanOrEqual": "5.16.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.17", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "5.10.101" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "5.15.24" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "5.16.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "5.17" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/7b53d2204ce79b27a878074a77d64f40ec21dbca" }, { "url": "https://git.kernel.org/stable/c/f90cc68f9f4b5d8585ad5d0a206a9d37ac299ef3" }, { "url": "https://git.kernel.org/stable/c/5b068f33bc8acfcfd5ea7992a2dafb30d89bad30" }, { "url": "https://git.kernel.org/stable/c/7c759040c1dd03954f650f147ae7175476d51314" } ], "title": "can: isotp: fix potential CAN frame reception race in isotp_rcv()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T15:25:01.526Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/7b53d2204ce79b27a878074a77d64f40ec21dbca", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/f90cc68f9f4b5d8585ad5d0a206a9d37ac299ef3", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/5b068f33bc8acfcfd5ea7992a2dafb30d89bad30", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/7c759040c1dd03954f650f147ae7175476d51314", "tags": [ "x_transferred" ] } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2022-48830", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T16:57:30.557476Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:34:11.140Z" } } ] } }