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CVE-2022-48999 (GCVE-0-2022-48999)

Vulnerability from cvelistv5 – Published: 2024-10-21 20:06 – Updated: 2026-08-05 08:53
VLAI
Title
ipv4: Handle attempt to delete multipath route when fib_info contains an nh reference
Summary
In the Linux kernel, the following vulnerability has been resolved: ipv4: Handle attempt to delete multipath route when fib_info contains an nh reference Gwangun Jung reported a slab-out-of-bounds access in fib_nh_match: fib_nh_match+0xf98/0x1130 linux-6.0-rc7/net/ipv4/fib_semantics.c:961 fib_table_delete+0x5f3/0xa40 linux-6.0-rc7/net/ipv4/fib_trie.c:1753 inet_rtm_delroute+0x2b3/0x380 linux-6.0-rc7/net/ipv4/fib_frontend.c:874 Separate nexthop objects are mutually exclusive with the legacy multipath spec. Fix fib_nh_match to return if the config for the to be deleted route contains a multipath spec while the fib_info is using a nexthop object.
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-10-22 13:15 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 493ced1ac47c48bb86d9d4e8e87df8592be85a0e , < cc3cd130ecfb8b0ae52e235e487bae3f16a24a32 (git)
Affected: 493ced1ac47c48bb86d9d4e8e87df8592be85a0e , < 0b5394229ebae09afc07aabccb5ffd705ffd250e (git)
Affected: 493ced1ac47c48bb86d9d4e8e87df8592be85a0e , < 25174d91e4a32a24204060d283bd5fa6d0ddf133 (git)
Affected: 493ced1ac47c48bb86d9d4e8e87df8592be85a0e , < bb20a2ae241be846bc3c11ea4b3a3c69e41d51f2 (git)
Affected: 493ced1ac47c48bb86d9d4e8e87df8592be85a0e , < 61b91eb33a69c3be11b259c5ea484505cd79f883 (git)
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Linux Linux Affected: 5.3
Unaffected: 0 , < 5.3 (semver)
Unaffected: 5.4.226 , ≤ 5.4.* (semver)
Unaffected: 5.10.158 , ≤ 5.10.* (semver)
Unaffected: 5.15.82 , ≤ 5.15.* (semver)
Unaffected: 6.0.12 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"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\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-10-22T13:15:29.512Z\"}}], \"cna\": {\"title\": \"ipv4: Handle attempt to delete multipath route when fib_info contains an nh reference\", \"metrics\": [{\"cvssV3_1\": {\"version\": \"3.1\", \"baseScore\": 7.1, \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"AV:L - Triggered via RTM_DELROUTE over rtnetlink (inet_rtm_delroute \\u2192 fib_table_delete \\u2192 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\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"493ced1ac47c48bb86d9d4e8e87df8592be85a0e\", \"lessThan\": \"cc3cd130ecfb8b0ae52e235e487bae3f16a24a32\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"493ced1ac47c48bb86d9d4e8e87df8592be85a0e\", \"lessThan\": \"0b5394229ebae09afc07aabccb5ffd705ffd250e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"493ced1ac47c48bb86d9d4e8e87df8592be85a0e\", \"lessThan\": \"25174d91e4a32a24204060d283bd5fa6d0ddf133\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"493ced1ac47c48bb86d9d4e8e87df8592be85a0e\", \"lessThan\": \"bb20a2ae241be846bc3c11ea4b3a3c69e41d51f2\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"493ced1ac47c48bb86d9d4e8e87df8592be85a0e\", \"lessThan\": \"61b91eb33a69c3be11b259c5ea484505cd79f883\", \"versionType\": \"git\"}], \"programFiles\": [\"net/ipv4/fib_semantics.c\", \"tools/testing/selftests/net/fib_nexthops.sh\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.3\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.3\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.226\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.158\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.82\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.0.12\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.0.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/ipv4/fib_semantics.c\", \"tools/testing/selftests/net/fib_nexthops.sh\"], \"defaultStatus\": \"affected\"}], \"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\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.226\", \"versionStartIncluding\": \"5.3\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.158\", \"versionStartIncluding\": \"5.3\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.82\", \"versionStartIncluding\": \"5.3\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.0.12\", \"versionStartIncluding\": \"5.3\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1\", \"versionStartIncluding\": \"5.3\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T08:53:22.725Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-48999\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T08:53:22.725Z\", \"dateReserved\": \"2024-08-22T01:27:53.642Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-10-21T20:06:14.118Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.