CVE-2019-25160 (GCVE-0-2019-25160)
Vulnerability from cvelistv5
Published
2024-02-26 17:20
Modified
2026-08-05 08:43
Severity ?
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: netlabel: fix out-of-bounds memory accesses There are two array out-of-bounds memory accesses, one in cipso_v4_map_lvl_valid(), the other in netlbl_bitmap_walk(). Both errors are embarassingly simple, and the fixes are straightforward. As a FYI for anyone backporting this patch to kernels prior to v4.8, you'll want to apply the netlbl_bitmap_walk() patch to cipso_v4_bitmap_walk() as netlbl_bitmap_walk() doesn't exist before Linux v4.8.
References
Impacted products
Vendor Product Version
Linux Linux Version: 446fda4f26822b2d42ab3396aafcedf38a9ff2b6
Version: 446fda4f26822b2d42ab3396aafcedf38a9ff2b6
Version: 446fda4f26822b2d42ab3396aafcedf38a9ff2b6
Version: 446fda4f26822b2d42ab3396aafcedf38a9ff2b6
Version: 446fda4f26822b2d42ab3396aafcedf38a9ff2b6
Version: 446fda4f26822b2d42ab3396aafcedf38a9ff2b6
Version: 446fda4f26822b2d42ab3396aafcedf38a9ff2b6
Version: 446fda4f26822b2d42ab3396aafcedf38a9ff2b6
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This is a net/ stack path processing remote peer packet data.\\nAC:L - With a CIPSO MAP_TRANS DOI configured (the labeled-networking deployment this subsystem targets), an attacker reliably triggers the OOB by setting an out-of-range level byte or category bitmap; DOI values are probeable via ICMP parameter-problem offsets. No race or other attacker-uncontrollable condition is required.\\nPR:N - Incoming skbs take the CIPSO path in __ip_options_compile without CAP_NET_RAW or any authentication; the privilege check applies only when skb is NULL (setsockopt). A remote unauthenticated sender can trigger the vulnerable validation.\\nUI:N - Exploitation requires only sending crafted IP packets to the host; no victim user action is needed.\\nS:U - Impact is confined to the receiving kernel\u0027s NetLabel/CIPSO processing and memory; there is no VM escape, IOMMU bypass, or other cross-authority boundary crossing.\\nC:H - cipso_v4_map_lvl_valid indexes an attacker-controlled u8 into the DOI level array without a size check, enabling a large kernel heap OOB read (up to ~1KB when cipso_size is small). Per guidance, unbounded OOB reads score Confidentiality High.\\nI:N - Both defects are out-of-bounds reads with no write, UAF, or control-flow corruption primitive; later map_lvl_ntoh still bounds-checks before applying labels, so there is no integrity impact.\\nA:H - The OOB reads can fault on unmapped pages and cause a kernel oops/panic, and a remote attacker can trigger them repeatedly for DoS against CIPSO-enabled hosts.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"446fda4f26822b2d42ab3396aafcedf38a9ff2b6\", \"lessThan\": \"97bc3683c24999ee621d847c9348c75d2fe86272\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"446fda4f26822b2d42ab3396aafcedf38a9ff2b6\", \"lessThan\": \"c61d01faa5550e06794dcf86125ccd325bfad950\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"446fda4f26822b2d42ab3396aafcedf38a9ff2b6\", \"lessThan\": \"dc18101f95fa6e815f426316b8b9a5cee28a334e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"446fda4f26822b2d42ab3396aafcedf38a9ff2b6\", \"lessThan\": \"1c973f9c7cc2b3caae93192fdc8ecb3f0b4ac000\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"446fda4f26822b2d42ab3396aafcedf38a9ff2b6\", \"lessThan\": \"fcfe700acdc1c72eab231300e82b962bac2b2b2c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"446fda4f26822b2d42ab3396aafcedf38a9ff2b6\", \"lessThan\": \"e3713abc4248aa6bcc11173d754c418b02a62cbb\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"446fda4f26822b2d42ab3396aafcedf38a9ff2b6\", \"lessThan\": \"fbf9578919d6c91100ec63acf2cba641383f6c78\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"446fda4f26822b2d42ab3396aafcedf38a9ff2b6\", \"lessThan\": \"5578de4834fe0f2a34fedc7374be691443396d1f\", \"versionType\": \"git\"}], \"programFiles\": [\"net/ipv4/cipso_ipv4.c\", \"net/netlabel/netlabel_kapi.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.19\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.19\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"3.16.66\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"3.16.*\"}, {\"status\": \"unaffected\", \"version\": \"3.18.137\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"3.18.*\"}, {\"status\": \"unaffected\", \"version\": \"4.4.177\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.4.*\"}, {\"status\": \"unaffected\", \"version\": \"4.9.163\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.9.*\"}, {\"status\": \"unaffected\", \"version\": \"4.14.106\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.28\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"4.20.15\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.20.*\"}, {\"status\": \"unaffected\", \"version\": \"5.0\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/ipv4/cipso_ipv4.c\", \"net/netlabel/netlabel_kapi.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/97bc3683c24999ee621d847c9348c75d2fe86272\"}, {\"url\": \"https://git.kernel.org/stable/c/c61d01faa5550e06794dcf86125ccd325bfad950\"}, {\"url\": \"https://git.kernel.org/stable/c/dc18101f95fa6e815f426316b8b9a5cee28a334e\"}, {\"url\": \"https://git.kernel.org/stable/c/1c973f9c7cc2b3caae93192fdc8ecb3f0b4ac000\"}, {\"url\": \"https://git.kernel.org/stable/c/fcfe700acdc1c72eab231300e82b962bac2b2b2c\"}, {\"url\": \"https://git.kernel.org/stable/c/e3713abc4248aa6bcc11173d754c418b02a62cbb\"}, {\"url\": \"https://git.kernel.org/stable/c/fbf9578919d6c91100ec63acf2cba641383f6c78\"}, {\"url\": \"https://git.kernel.org/stable/c/5578de4834fe0f2a34fedc7374be691443396d1f\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetlabel: fix out-of-bounds memory accesses\\n\\nThere are two array out-of-bounds memory accesses, one in\\ncipso_v4_map_lvl_valid(), the other in netlbl_bitmap_walk().  Both\\nerrors are embarassingly simple, and the fixes are straightforward.\\n\\nAs a FYI for anyone backporting this patch to kernels prior to v4.8,\\nyou\u0027ll want to apply the netlbl_bitmap_walk() patch to\\ncipso_v4_bitmap_walk() as netlbl_bitmap_walk() doesn\u0027t exist before\\nLinux v4.8.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"3.16.66\", \"versionStartIncluding\": \"2.6.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"3.18.137\", \"versionStartIncluding\": \"2.6.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.4.177\", \"versionStartIncluding\": \"2.6.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.9.163\", \"versionStartIncluding\": \"2.6.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.106\", \"versionStartIncluding\": \"2.6.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.28\", \"versionStartIncluding\": \"2.6.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.20.15\", \"versionStartIncluding\": \"2.6.19\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.0\", \"versionStartIncluding\": \"2.6.19\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T08:43:45.278Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2019-25160\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T08:43:45.278Z\", \"dateReserved\": \"2024-02-26T17:07:20.465Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-02-26T17:20:19.490Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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