{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49017", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-08-22T01:27:53.646Z", "datePublished": "2024-10-21T20:06:25.971Z", "dateUpdated": "2026-08-05T08:53:28.139Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:53:28.139Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: re-fetch skb cb after tipc_msg_validate\n\nAs the call trace shows, the original skb was freed in tipc_msg_validate(),\nand dereferencing the old skb cb would cause an use-after-free crash.\n\n BUG: KASAN: use-after-free in tipc_crypto_rcv_complete+0x1835/0x2240 [tipc]\n Call Trace:\n \n tipc_crypto_rcv_complete+0x1835/0x2240 [tipc]\n tipc_crypto_rcv+0xd32/0x1ec0 [tipc]\n tipc_rcv+0x744/0x1150 [tipc]\n ...\n Allocated by task 47078:\n kmem_cache_alloc_node+0x158/0x4d0\n __alloc_skb+0x1c1/0x270\n tipc_buf_acquire+0x1e/0xe0 [tipc]\n tipc_msg_create+0x33/0x1c0 [tipc]\n tipc_link_build_proto_msg+0x38a/0x2100 [tipc]\n tipc_link_timeout+0x8b8/0xef0 [tipc]\n tipc_node_timeout+0x2a1/0x960 [tipc]\n call_timer_fn+0x2d/0x1c0\n ...\n Freed by task 47078:\n tipc_msg_validate+0x7b/0x440 [tipc]\n tipc_crypto_rcv_complete+0x4b5/0x2240 [tipc]\n tipc_crypto_rcv+0xd32/0x1ec0 [tipc]\n tipc_rcv+0x744/0x1150 [tipc]\n\nThis patch fixes it by re-fetching the skb cb from the new allocated skb\nafter calling tipc_msg_validate()." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:N - The vulnerable path is tipc_udp_recv/tipc_l2_rcv_msg → tipc_rcv → tipc_crypto_rcv → tipc_crypto_rcv_complete, reached by processing encrypted TIPC packets from a remote peer over UDP or Ethernet bearers.\nAC:L - A peer who can send valid encrypted TIPC messages reliably drives the decrypt-complete path; the tipc_msg_validate skb replacement triggers on common high-truesize RX buffers (e.g. page-backed skbs), with no race beyond attacker control.\nPR:L - Successful AEAD decryption is required before tipc_msg_validate and the UAF write, so the attacker must possess the cluster/node TIPC encryption key as an authenticated peer, but needs no elevated OS privileges on the victim.\nUI:N - Exploitation is fully driven by attacker-sent encrypted packets; no victim user action is required once a TIPC bearer with crypto is configured and running.\nS:U - This is standard in-kernel memory corruption within the host TIPC stack and does not cross a VM, IOMMU, or other security authority boundary.\nC:H - Use-after-free of the skb control block enables heap reuse and attacker-controlled object contents, which can be leveraged for arbitrary kernel memory disclosure.\nI:H - The bug writes to freed skb->cb (decrypted flag and possibly tx_clone_ctx memset), giving a UAF write primitive exploitable for corruption and control-flow hijacking.\nA:H - The KASAN report shows a use-after-free crash in IRQ context; the UAF can cause kernel oops/panic and denial of service even when not fully exploited for code execution." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/tipc/crypto.c" ], "versions": [ { "version": "fc1b6d6de2208774efd2a20bf0daddb02d18b1e0", "lessThan": "a1ba595e35aa3afbe417ff0af353afb9f65559c0", "status": "affected", "versionType": "git" }, { "version": "fc1b6d6de2208774efd2a20bf0daddb02d18b1e0", "lessThan": "1daec0815655e110c6f206c5e777a4af8168ff58", "status": "affected", "versionType": "git" }, { "version": "fc1b6d6de2208774efd2a20bf0daddb02d18b1e0", "lessThan": "e128190adb2edfd5042105b5d1ed4553f295f5ef", "status": "affected", "versionType": "git" }, { "version": "fc1b6d6de2208774efd2a20bf0daddb02d18b1e0", "lessThan": "3067bc61fcfe3081bf4807ce65560f499e895e77", "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/tipc/crypto.c" ], "versions": [ { "version": "5.5", "status": "affected" }, { "version": "0", "lessThan": "5.5", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.158", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.82", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.0.12", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1", "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": "5.5", "versionEndExcluding": "5.10.158" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.15.82" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.0.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/a1ba595e35aa3afbe417ff0af353afb9f65559c0" }, { "url": "https://git.kernel.org/stable/c/1daec0815655e110c6f206c5e777a4af8168ff58" }, { "url": "https://git.kernel.org/stable/c/e128190adb2edfd5042105b5d1ed4553f295f5ef" }, { "url": "https://git.kernel.org/stable/c/3067bc61fcfe3081bf4807ce65560f499e895e77" } ], "title": "tipc: re-fetch skb cb after tipc_msg_validate", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2022-49017", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-10-22T13:13:05.882492Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-10-22T13:18:37.715Z" } } ] } }