{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49667", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T02:21:30.436Z", "datePublished": "2025-02-26T02:24:01.818Z", "dateUpdated": "2026-08-05T08:55:58.300Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:55:58.300Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bonding: fix use-after-free after 802.3ad slave unbind\n\ncommit 0622cab0341c (\"bonding: fix 802.3ad aggregator reselection\"),\nresolve case, when there is several aggregation groups in the same bond.\nbond_3ad_unbind_slave will invalidate (clear) aggregator when\n__agg_active_ports return zero. So, ad_clear_agg can be executed even, when\nnum_of_ports!=0. Than bond_3ad_unbind_slave can be executed again for,\npreviously cleared aggregator. NOTE: at this time bond_3ad_unbind_slave\nwill not update slave ports list, because lag_ports==NULL. So, here we\ngot slave ports, pointing to freed aggregator memory.\n\nFix with checking actual number of ports in group (as was before\ncommit 0622cab0341c (\"bonding: fix 802.3ad aggregator reselection\") ),\nbefore ad_clear_agg().\n\nThe KASAN logs are as follows:\n\n[ 767.617392] ==================================================================\n[ 767.630776] BUG: KASAN: use-after-free in bond_3ad_state_machine_handler+0x13dc/0x1470\n[ 767.638764] Read of size 2 at addr ffff00011ba9d430 by task kworker/u8:7/767\n[ 767.647361] CPU: 3 PID: 767 Comm: kworker/u8:7 Tainted: G O 5.15.11 #15\n[ 767.655329] Hardware name: DNI AmazonGo1 A7040 board (DT)\n[ 767.660760] Workqueue: lacp_1 bond_3ad_state_machine_handler\n[ 767.666468] Call trace:\n[ 767.668930] dump_backtrace+0x0/0x2d0\n[ 767.672625] show_stack+0x24/0x30\n[ 767.675965] dump_stack_lvl+0x68/0x84\n[ 767.679659] print_address_description.constprop.0+0x74/0x2b8\n[ 767.685451] kasan_report+0x1f0/0x260\n[ 767.689148] __asan_load2+0x94/0xd0\n[ 767.692667] bond_3ad_state_machine_handler+0x13dc/0x1470" } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The UAF is triggered by bond slave release (SIOCBONDRELEASE/rtnetlink ndo_del_slave → bond_3ad_unbind_slave), which requires local netlink/ioctl access; LACPDU traffic alone cannot unbind slaves.\nAC:L - An attacker who can manage the bond fully controls the trigger sequence—create an 802.3ad bond, form multi-port aggregators via crafted LACPDUs on veth peers, force ports inactive, then unbind slaves—so success does not depend on external timing or state.\nPR:L - Creating bonds, enslaving/releasing veth/dummy slaves, and related netlink ops only need CAP_NET_ADMIN in the network namespace’s user_ns (ns_capable), which an unprivileged user obtains via user+net namespaces.\nUI:N - Exploitation is entirely attacker-driven through local namespace and interface operations; no separate victim action is required.\nS:U - Impact is kernel memory corruption and privilege escalation within the same host kernel authority, with no VM/IOMMU or cross-boundary escape.\nC:H - Use-after-free of heap-allocated struct ad_slave_info/aggregator lets an attacker reclaim and control the freed object, enabling arbitrary kernel reads.\nI:H - The same UAF is exploitable for heap spray and arbitrary write / control-flow hijacking in kernel context.\nA:H - The dangling aggregator pointer is dereferenced by bond_3ad_state_machine_handler (KASAN-confirmed), causing kernel oops/panic even without full exploitation." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/bonding/bond_3ad.c" ], "versions": [ { "version": "0622cab0341cac6b30da177b0faa39fae0680e71", "lessThan": "a853b7a3a9fd1d74a4ccdd9cd73512b7dace2f1e", "status": "affected", "versionType": "git" }, { "version": "0622cab0341cac6b30da177b0faa39fae0680e71", "lessThan": "b90ac60303063a43e17dd4aec159067599d255e6", "status": "affected", "versionType": "git" }, { "version": "0622cab0341cac6b30da177b0faa39fae0680e71", "lessThan": "f162f7c348fa2a5555bafdb5cc890b89b221e69c", "status": "affected", "versionType": "git" }, { "version": "0622cab0341cac6b30da177b0faa39fae0680e71", "lessThan": "893825289ba840afd86bfffcb6f7f363c73efff8", "status": "affected", "versionType": "git" }, { "version": "0622cab0341cac6b30da177b0faa39fae0680e71", "lessThan": "63b2fe509f69b90168a75e04e14573dccf7984e6", "status": "affected", "versionType": "git" }, { "version": "0622cab0341cac6b30da177b0faa39fae0680e71", "lessThan": "ef0af7d08d26c5333ff4944a559279464edf6f15", "status": "affected", "versionType": "git" }, { "version": "0622cab0341cac6b30da177b0faa39fae0680e71", "lessThan": "2765749def4765c5052a4c66445cf4c96fcccdbc", "status": "affected", "versionType": "git" }, { "version": "0622cab0341cac6b30da177b0faa39fae0680e71", "lessThan": "050133e1aa2cb49bb17be847d48a4431598ef562", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/bonding/bond_3ad.c" ], "versions": [ { "version": "4.7", "status": "affected" }, { "version": "0", "lessThan": "4.7", "status": "unaffected", "versionType": "semver" }, { "version": "4.9.322", "lessThanOrEqual": "4.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.14.287", "lessThanOrEqual": "4.14.*", "status": "unaffected", "versionType": "semver" }, { "version": "4.19.251", "lessThanOrEqual": "4.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.204", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.129", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.53", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.18.10", "lessThanOrEqual": "5.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.19", "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": "4.7", "versionEndExcluding": "4.9.322" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "4.14.287" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "4.19.251" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "5.4.204" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "5.10.129" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "5.15.53" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "5.18.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.7", "versionEndExcluding": "5.19" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/a853b7a3a9fd1d74a4ccdd9cd73512b7dace2f1e" }, { "url": "https://git.kernel.org/stable/c/b90ac60303063a43e17dd4aec159067599d255e6" }, { "url": "https://git.kernel.org/stable/c/f162f7c348fa2a5555bafdb5cc890b89b221e69c" }, { "url": "https://git.kernel.org/stable/c/893825289ba840afd86bfffcb6f7f363c73efff8" }, { "url": "https://git.kernel.org/stable/c/63b2fe509f69b90168a75e04e14573dccf7984e6" }, { "url": "https://git.kernel.org/stable/c/ef0af7d08d26c5333ff4944a559279464edf6f15" }, { "url": "https://git.kernel.org/stable/c/2765749def4765c5052a4c66445cf4c96fcccdbc" }, { "url": "https://git.kernel.org/stable/c/050133e1aa2cb49bb17be847d48a4431598ef562" } ], "title": "net: bonding: fix use-after-free after 802.3ad slave unbind", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2022-49667", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2025-02-27T18:15:14.271545Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-02-27T18:22:31.234Z" } } ] } }