{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-49696", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-26T02:21:30.443Z", "datePublished": "2025-02-26T02:24:18.198Z", "dateUpdated": "2026-08-05T08:56:03.629Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:56:03.629Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntipc: fix use-after-free Read in tipc_named_reinit\n\nsyzbot found the following issue on:\n==================================================================\nBUG: KASAN: use-after-free in tipc_named_reinit+0x94f/0x9b0\nnet/tipc/name_distr.c:413\nRead of size 8 at addr ffff88805299a000 by task kworker/1:9/23764\n\nCPU: 1 PID: 23764 Comm: kworker/1:9 Not tainted\n5.18.0-rc4-syzkaller-00878-g17d49e6e8012 #0\nHardware name: Google Compute Engine/Google Compute Engine,\nBIOS Google 01/01/2011\nWorkqueue: events tipc_net_finalize_work\nCall Trace:\n \n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106\n print_address_description.constprop.0.cold+0xeb/0x495\nmm/kasan/report.c:313\n print_report mm/kasan/report.c:429 [inline]\n kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491\n tipc_named_reinit+0x94f/0x9b0 net/tipc/name_distr.c:413\n tipc_net_finalize+0x234/0x3d0 net/tipc/net.c:138\n process_one_work+0x996/0x1610 kernel/workqueue.c:2289\n worker_thread+0x665/0x1080 kernel/workqueue.c:2436\n kthread+0x2e9/0x3a0 kernel/kthread.c:376\n ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298\n \n[...]\n==================================================================\n\nIn the commit\nd966ddcc3821 (\"tipc: fix a deadlock when flushing scheduled work\"),\nthe cancel_work_sync() function just to make sure ONLY the work\ntipc_net_finalize_work() is executing/pending on any CPU completed before\ntipc namespace is destroyed through tipc_exit_net(). But this function\nis not guaranteed the work is the last queued. So, the destroyed instance\nmay be accessed in the work which will try to enqueue later.\n\nIn order to completely fix, we re-order the calling of cancel_work_sync()\nto make sure the work tipc_net_finalize_work() was last queued and it\nmust be completed by calling cancel_work_sync()." } ], "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 - Exploitation requires local netns lifecycle control (create/configure TIPC, then destroy the namespace via tipc_exit_net); remote discovery packets can only help schedule work and cannot alone trigger the teardown UAF.\nAC:L - The attacker controls both sides of the race—configuring TIPC/bearer (starting the ~1s address trial/discovery timer) and destroying the netns—so success does not depend on conditions outside attacker influence.\nPR:L - An unprivileged user can reach the path via user+network namespaces (unshare); TIPC genetlink ops lack GENL_ADMIN_PERM, and any CAP_NET_ADMIN needed for bearer/net setup is available inside a user namespace.\nUI:N - No victim action is required; the attacker triggers configuration and netns destruction themselves.\nS:U - Impact is confined to the host kernel authority (local privilege escalation/memory corruption); this is not a VM, IOMMU, or other cross-boundary escape.\nC:H - Use-after-free of the name_table gives a read of freed kernel heap (and further finalize path access), which can be leveraged for arbitrary information disclosure per UAF guidance.\nI:H - tipc_named_reinit writes through freed publication list entries (p->sk.node), and tipc_net_finalize continues into further reinit/publish paths—enabling heap corruption and control-flow hijacking primitives.\nA:H - The UAF reliably produces kernel oops/KASAN crashes (as seen by syzbot), constituting a full availability impact on the system." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/tipc/core.c" ], "versions": [ { "version": "d966ddcc38217a6110a6a0ff37ad2dee7d42e23e", "lessThan": "361c5521c1e49843b710f455cae3c0a50b714323", "status": "affected", "versionType": "git" }, { "version": "d966ddcc38217a6110a6a0ff37ad2dee7d42e23e", "lessThan": "cd7789e659e84f137631dc1f5ec8d794f2700e6c", "status": "affected", "versionType": "git" }, { "version": "d966ddcc38217a6110a6a0ff37ad2dee7d42e23e", "lessThan": "8b246ddd394d7d9640816611693b0096b998e27a", "status": "affected", "versionType": "git" }, { "version": "d966ddcc38217a6110a6a0ff37ad2dee7d42e23e", "lessThan": "911600bf5a5e84bfda4d33ee32acc75ecf6159f0", "status": "affected", "versionType": "git" }, { "version": "fdc1416c21992ea7b4737123c8aa8c7424a1a540", "status": "affected", "versionType": "git" }, { "version": "1716c9bd567bc6cdb3d18be78f36941a306b708d", "status": "affected", "versionType": "git" }, { "version": "5.4.83", "lessThan": "5.5", "status": "affected", "versionType": "semver" }, { "version": "5.9.14", "lessThan": "5.10", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/tipc/core.c" ], "versions": [ { "version": "5.10", "status": "affected" }, { "version": "0", "lessThan": "5.10", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.127", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.51", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.18.8", "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": "5.10", "versionEndExcluding": "5.10.127" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "5.15.51" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "5.18.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.10", "versionEndExcluding": "5.19" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.83" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9.14" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/361c5521c1e49843b710f455cae3c0a50b714323" }, { "url": "https://git.kernel.org/stable/c/cd7789e659e84f137631dc1f5ec8d794f2700e6c" }, { "url": "https://git.kernel.org/stable/c/8b246ddd394d7d9640816611693b0096b998e27a" }, { "url": "https://git.kernel.org/stable/c/911600bf5a5e84bfda4d33ee32acc75ecf6159f0" } ], "title": "tipc: fix use-after-free Read in tipc_named_reinit", "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-2022-49696", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2025-02-27T18:15:01.243249Z" } } } ], "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": "2025-02-27T18:22:30.889Z" } } ] } }