{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-48999", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-08-22T01:27:53.642Z", "datePublished": "2024-10-21T20:06:14.118Z", "dateUpdated": "2026-08-05T08:53:22.725Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T08:53:22.725Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: Handle attempt to delete multipath route when fib_info contains an nh reference\n\nGwangun Jung reported a slab-out-of-bounds access in fib_nh_match:\n fib_nh_match+0xf98/0x1130 linux-6.0-rc7/net/ipv4/fib_semantics.c:961\n fib_table_delete+0x5f3/0xa40 linux-6.0-rc7/net/ipv4/fib_trie.c:1753\n inet_rtm_delroute+0x2b3/0x380 linux-6.0-rc7/net/ipv4/fib_frontend.c:874\n\nSeparate nexthop objects are mutually exclusive with the legacy\nmultipath spec. Fix fib_nh_match to return if the config for the\nto be deleted route contains a multipath spec while the fib_info\nis using a nexthop object." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - Triggered via RTM_DELROUTE over rtnetlink (inet_rtm_delroute → fib_table_delete → fib_nh_match), which requires a local process with a netlink socket, not remote packet processing.\nAC:L - An attacker can reliably create a nexthop-object route and then delete it with a legacy multipath nexthop spec; no races or attacker-uncontrollable conditions are required.\nPR:L - RTM_DELROUTE/RTM_NEWNEXTHOP require CAP_NET_ADMIN, but that capability is available to an unprivileged user inside a user+network namespace (netlink_net_capable checks the netns user_ns).\nUI:N - Exploitation needs no victim action; the attacker sets up the nexthop route and issues the delete themselves.\nS:U - Impact is confined to the local kernel networking stack authority; this is not a VM/IOMMU/sandbox boundary cross.\nC:H - The bug is a slab out-of-bounds read of struct fib_nh fields past a zero-length fib_nh[] allocation; with a multipath nexthop group, fib_info_num_path() expands the OOB window across adjacent slab memory.\nI:N - The vulnerable path only reads and compares OOB memory for route matching; there is no out-of-bounds write or memory-corruption write primitive.\nA:H - The slab OOB access can oops/panic the kernel when it hits unmapped or poisoned memory, matching the reported KASAN slab-out-of-bounds crash." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/ipv4/fib_semantics.c", "tools/testing/selftests/net/fib_nexthops.sh" ], "versions": [ { "version": "493ced1ac47c48bb86d9d4e8e87df8592be85a0e", "lessThan": "cc3cd130ecfb8b0ae52e235e487bae3f16a24a32", "status": "affected", "versionType": "git" }, { "version": "493ced1ac47c48bb86d9d4e8e87df8592be85a0e", "lessThan": "0b5394229ebae09afc07aabccb5ffd705ffd250e", "status": "affected", "versionType": "git" }, { "version": "493ced1ac47c48bb86d9d4e8e87df8592be85a0e", "lessThan": "25174d91e4a32a24204060d283bd5fa6d0ddf133", "status": "affected", "versionType": "git" }, { "version": "493ced1ac47c48bb86d9d4e8e87df8592be85a0e", "lessThan": "bb20a2ae241be846bc3c11ea4b3a3c69e41d51f2", "status": "affected", "versionType": "git" }, { "version": "493ced1ac47c48bb86d9d4e8e87df8592be85a0e", "lessThan": "61b91eb33a69c3be11b259c5ea484505cd79f883", "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/ipv4/fib_semantics.c", "tools/testing/selftests/net/fib_nexthops.sh" ], "versions": [ { "version": "5.3", "status": "affected" }, { "version": "0", "lessThan": "5.3", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.226", "lessThanOrEqual": "5.4.*", "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": "5.3", "versionEndExcluding": "5.4.226" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "5.10.158" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "5.15.82" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.0.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.1" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/cc3cd130ecfb8b0ae52e235e487bae3f16a24a32" }, { "url": "https://git.kernel.org/stable/c/0b5394229ebae09afc07aabccb5ffd705ffd250e" }, { "url": "https://git.kernel.org/stable/c/25174d91e4a32a24204060d283bd5fa6d0ddf133" }, { "url": "https://git.kernel.org/stable/c/bb20a2ae241be846bc3c11ea4b3a3c69e41d51f2" }, { "url": "https://git.kernel.org/stable/c/61b91eb33a69c3be11b259c5ea484505cd79f883" } ], "title": "ipv4: Handle attempt to delete multipath route when fib_info contains an nh reference", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2022-48999", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-10-22T13:15:25.948167Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-10-22T13:18:40.948Z" } } ] } }