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CVE-2023-52906 (GCVE-0-2023-52906)

Vulnerability from cvelistv5 – Published: 2024-08-21 06:10 – Updated: 2026-05-11 19:35
VLAI
Title
net/sched: act_mpls: Fix warning during failed attribute validation
Summary
In the Linux kernel, the following vulnerability has been resolved: net/sched: act_mpls: Fix warning during failed attribute validation The 'TCA_MPLS_LABEL' attribute is of 'NLA_U32' type, but has a validation type of 'NLA_VALIDATE_FUNCTION'. This is an invalid combination according to the comment above 'struct nla_policy': " Meaning of `validate' field, use via NLA_POLICY_VALIDATE_FN: NLA_BINARY Validation function called for the attribute. All other Unused - but note that it's a union " This can trigger the warning [1] in nla_get_range_unsigned() when validation of the attribute fails. Despite being of 'NLA_U32' type, the associated 'min'/'max' fields in the policy are negative as they are aliased by the 'validate' field. Fix by changing the attribute type to 'NLA_BINARY' which is consistent with the above comment and all other users of NLA_POLICY_VALIDATE_FN(). As a result, move the length validation to the validation function. No regressions in MPLS tests: # ./tdc.py -f tc-tests/actions/mpls.json [...] # echo $? 0 [1] WARNING: CPU: 0 PID: 17743 at lib/nlattr.c:118 nla_get_range_unsigned+0x1d8/0x1e0 lib/nlattr.c:117 Modules linked in: CPU: 0 PID: 17743 Comm: syz-executor.0 Not tainted 6.1.0-rc8 #3 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.13.0-48-gd9c812dda519-prebuilt.qemu.org 04/01/2014 RIP: 0010:nla_get_range_unsigned+0x1d8/0x1e0 lib/nlattr.c:117 [...] Call Trace: <TASK> __netlink_policy_dump_write_attr+0x23d/0x990 net/netlink/policy.c:310 netlink_policy_dump_write_attr+0x22/0x30 net/netlink/policy.c:411 netlink_ack_tlv_fill net/netlink/af_netlink.c:2454 [inline] netlink_ack+0x546/0x760 net/netlink/af_netlink.c:2506 netlink_rcv_skb+0x1b7/0x240 net/netlink/af_netlink.c:2546 rtnetlink_rcv+0x18/0x20 net/core/rtnetlink.c:6109 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline] netlink_unicast+0x5e9/0x6b0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x739/0x860 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c:714 [inline] sock_sendmsg net/socket.c:734 [inline] ____sys_sendmsg+0x38f/0x500 net/socket.c:2482 ___sys_sendmsg net/socket.c:2536 [inline] __sys_sendmsg+0x197/0x230 net/socket.c:2565 __do_sys_sendmsg net/socket.c:2574 [inline] __se_sys_sendmsg net/socket.c:2572 [inline] __x64_sys_sendmsg+0x42/0x50 net/socket.c:2572 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 16:03 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 2a2ea50870baa3fb4de0872c5b60828138654ca7 , < 2b157c3c5d6b8ddca48d53c9e662032f65af8d61 (git)
Affected: 2a2ea50870baa3fb4de0872c5b60828138654ca7 , < 453277feb41c2235cf2c0de9209eef962c401457 (git)
Affected: 2a2ea50870baa3fb4de0872c5b60828138654ca7 , < 9e2c38827cdc6fdd3bb375c8607fc04d289756f9 (git)
Affected: 2a2ea50870baa3fb4de0872c5b60828138654ca7 , < 8a97b544b98e44f596219ebb290fd2ba2fd5d644 (git)
Affected: 2a2ea50870baa3fb4de0872c5b60828138654ca7 , < 9e17f99220d111ea031b44153fdfe364b0024ff2 (git)
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Linux Linux Affected: 5.3
Unaffected: 0 , < 5.3 (semver)
Unaffected: 5.4.229 , ≤ 5.4.* (semver)
Unaffected: 5.10.164 , ≤ 5.10.* (semver)
Unaffected: 5.15.89 , ≤ 5.15.* (semver)
Unaffected: 6.1.7 , ≤ 6.1.* (semver)
Unaffected: 6.2 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/sched: act_mpls: Fix warning during failed attribute validation\n\nThe \u0027TCA_MPLS_LABEL\u0027 attribute is of \u0027NLA_U32\u0027 type, but has a\nvalidation type of \u0027NLA_VALIDATE_FUNCTION\u0027. This is an invalid\ncombination according to the comment above \u0027struct nla_policy\u0027:\n\n\"\nMeaning of `validate\u0027 field, use via NLA_POLICY_VALIDATE_FN:\n   NLA_BINARY           Validation function called for the attribute.\n   All other            Unused - but note that it\u0027s a union\n\"\n\nThis can trigger the warning [1] in nla_get_range_unsigned() when\nvalidation of the attribute fails. Despite being of \u0027NLA_U32\u0027 type, the\nassociated \u0027min\u0027/\u0027max\u0027 fields in the policy are negative as they are\naliased by the \u0027validate\u0027 field.\n\nFix by changing the attribute type to \u0027NLA_BINARY\u0027 which is consistent\nwith the above comment and all other users of NLA_POLICY_VALIDATE_FN().\nAs a result, move the length validation to the validation function.\n\nNo regressions in MPLS tests:\n\n # ./tdc.py -f tc-tests/actions/mpls.json\n [...]\n # echo $?\n 0\n\n[1]\nWARNING: CPU: 0 PID: 17743 at lib/nlattr.c:118\nnla_get_range_unsigned+0x1d8/0x1e0 lib/nlattr.c:117\nModules linked in:\nCPU: 0 PID: 17743 Comm: syz-executor.0 Not tainted 6.1.0-rc8 #3\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS\nrel-1.13.0-48-gd9c812dda519-prebuilt.qemu.org 04/01/2014\nRIP: 0010:nla_get_range_unsigned+0x1d8/0x1e0 lib/nlattr.c:117\n[...]\nCall Trace:\n \u003cTASK\u003e\n __netlink_policy_dump_write_attr+0x23d/0x990 net/netlink/policy.c:310\n netlink_policy_dump_write_attr+0x22/0x30 net/netlink/policy.c:411\n netlink_ack_tlv_fill net/netlink/af_netlink.c:2454 [inline]\n netlink_ack+0x546/0x760 net/netlink/af_netlink.c:2506\n netlink_rcv_skb+0x1b7/0x240 net/netlink/af_netlink.c:2546\n rtnetlink_rcv+0x18/0x20 net/core/rtnetlink.c:6109\n netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]\n netlink_unicast+0x5e9/0x6b0 net/netlink/af_netlink.c:1345\n netlink_sendmsg+0x739/0x860 net/netlink/af_netlink.c:1921\n sock_sendmsg_nosec net/socket.c:714 [inline]\n sock_sendmsg net/socket.c:734 [inline]\n ____sys_sendmsg+0x38f/0x500 net/socket.c:2482\n ___sys_sendmsg net/socket.c:2536 [inline]\n __sys_sendmsg+0x197/0x230 net/socket.c:2565\n __do_sys_sendmsg net/socket.c:2574 [inline]\n __se_sys_sendmsg net/socket.c:2572 [inline]\n __x64_sys_sendmsg+0x42/0x50 net/socket.c:2572\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80\n entry_SYSCALL_64_after_hwframe+0x63/0xcd"
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    "cveId": "CVE-2023-52906",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2023-52906\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-08-21T07:15:06.663\",\"lastModified\":\"2026-06-17T06:43:54.353\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet/sched: act_mpls: Fix warning during failed attribute validation\\n\\nThe \u0027TCA_MPLS_LABEL\u0027 attribute is of \u0027NLA_U32\u0027 type, but has a\\nvalidation type of \u0027NLA_VALIDATE_FUNCTION\u0027. This is an invalid\\ncombination according to the comment above \u0027struct nla_policy\u0027:\\n\\n\\\"\\nMeaning of `validate\u0027 field, use via NLA_POLICY_VALIDATE_FN:\\n   NLA_BINARY           Validation function called for the attribute.\\n   All other            Unused - but note that it\u0027s a union\\n\\\"\\n\\nThis can trigger the warning [1] in nla_get_range_unsigned() when\\nvalidation of the attribute fails. Despite being of \u0027NLA_U32\u0027 type, the\\nassociated \u0027min\u0027/\u0027max\u0027 fields in the policy are negative as they are\\naliased by the \u0027validate\u0027 field.\\n\\nFix by changing the attribute type to \u0027NLA_BINARY\u0027 which is consistent\\nwith the above comment and all other users of NLA_POLICY_VALIDATE_FN().\\nAs a result, move the length validation to the validation function.\\n\\nNo regressions in MPLS tests:\\n\\n # ./tdc.py -f tc-tests/actions/mpls.json\\n [...]\\n # echo $?\\n 0\\n\\n[1]\\nWARNING: CPU: 0 PID: 17743 at lib/nlattr.c:118\\nnla_get_range_unsigned+0x1d8/0x1e0 lib/nlattr.c:117\\nModules linked in:\\nCPU: 0 PID: 17743 Comm: syz-executor.0 Not tainted 6.1.0-rc8 #3\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS\\nrel-1.13.0-48-gd9c812dda519-prebuilt.qemu.org 04/01/2014\\nRIP: 0010:nla_get_range_unsigned+0x1d8/0x1e0 lib/nlattr.c:117\\n[...]\\nCall Trace:\\n \u003cTASK\u003e\\n __netlink_policy_dump_write_attr+0x23d/0x990 net/netlink/policy.c:310\\n netlink_policy_dump_write_attr+0x22/0x30 net/netlink/policy.c:411\\n netlink_ack_tlv_fill net/netlink/af_netlink.c:2454 [inline]\\n netlink_ack+0x546/0x760 net/netlink/af_netlink.c:2506\\n netlink_rcv_skb+0x1b7/0x240 net/netlink/af_netlink.c:2546\\n rtnetlink_rcv+0x18/0x20 net/core/rtnetlink.c:6109\\n netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]\\n netlink_unicast+0x5e9/0x6b0 net/netlink/af_netlink.c:1345\\n netlink_sendmsg+0x739/0x860 net/netlink/af_netlink.c:1921\\n sock_sendmsg_nosec net/socket.c:714 [inline]\\n sock_sendmsg net/socket.c:734 [inline]\\n ____sys_sendmsg+0x38f/0x500 net/socket.c:2482\\n ___sys_sendmsg net/socket.c:2536 [inline]\\n __sys_sendmsg+0x197/0x230 net/socket.c:2565\\n __do_sys_sendmsg net/socket.c:2574 [inline]\\n __se_sys_sendmsg net/socket.c:2572 [inline]\\n __x64_sys_sendmsg+0x42/0x50 net/socket.c:2572\\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\\n do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80\\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/sched: act_mpls: Advertencia de correcci\u00f3n durante la validaci\u00f3n fallida del atributo El atributo \u0027TCA_MPLS_LABEL\u0027 es de tipo \u0027NLA_U32\u0027, pero tiene un tipo de validaci\u00f3n de \u0027NLA_VALIDATE_FUNCTION\u0027. Esta es una combinaci\u00f3n no v\u00e1lida seg\u00fan el comentario anterior \u0027struct nla_policy\u0027: \\\" Significado del campo `validar\u0027, util\u00edcelo a trav\u00e9s de NLA_POLICY_VALIDATE_FN: NLA_BINARY Funci\u00f3n de validaci\u00f3n llamada para el atributo. Todos los dem\u00e1s no utilizados, pero tenga en cuenta que es una uni\u00f3n \\\" Esto puede desencadenar la advertencia [1] en nla_get_range_unsigned() cuando falla la validaci\u00f3n del atributo. A pesar de ser del tipo \u0027NLA_U32\u0027, los campos \u0027min\u0027/\u0027max\u0027 asociados en la pol\u00edtica son negativos ya que tienen un alias del campo \u0027validate\u0027. Para solucionarlo, cambie el tipo de atributo a \u0027NLA_BINARY\u0027, que es coherente con el comentario anterior y con todos los dem\u00e1s usuarios de NLA_POLICY_VALIDATE_FN(). Como resultado, mueva la validaci\u00f3n de longitud a la funci\u00f3n de validaci\u00f3n. No hay regresiones en las pruebas MPLS: # ./tdc.py -f tc-tests/actions/mpls.json [...] # echo $? 0 [1] ADVERTENCIA: CPU: 0 PID: 17743 en lib/nlattr.c:118 nla_get_range_unsigned+0x1d8/0x1e0 lib/nlattr.c:117 M\u00f3dulos vinculados en: CPU: 0 PID: 17743 Comm: syz-executor.0 No tainted 6.1.0-rc8 #3 Nombre del hardware: PC est\u00e1ndar QEMU (i440FX + PIIX, 1996), BIOS rel-1.13.0-48-gd9c812dda519-prebuilt.qemu.org 01/04/2014 RIP: 0010:nla_get_range_unsigned+0x1d8 /0x1e0 lib/nlattr.c:117 [...] Seguimiento de llamadas:  __netlink_policy_dump_write_attr+0x23d/0x990 net/netlink/policy.c:310 netlink_policy_dump_write_attr+0x22/0x30 net/netlink/policy.c:411 netlink_ack_tlv_fill net /netlink/af_netlink.c:2454 [en l\u00ednea] netlink_ack+0x546/0x760 net/netlink/af_netlink.c:2506 netlink_rcv_skb+0x1b7/0x240 net/netlink/af_netlink.c:2546 rtnetlink_rcv+0x18/0x20 net/core/rtnetlink. c:6109 netlink_unicast_kernel net/netlink/af_netlink.c:1319 [en l\u00ednea] netlink_unicast+0x5e9/0x6b0 net/netlink/af_netlink.c:1345 netlink_sendmsg+0x739/0x860 net/netlink/af_netlink.c:1921 sock_sendmsg_nosec net/socket.c :714 [en l\u00ednea] sock_sendmsg net/socket.c:734 [en l\u00ednea] ____sys_sendmsg+0x38f/0x500 net/socket.c:2482 ___sys_sendmsg net/socket.c:2536 [en l\u00ednea] __sys_sendmsg+0x197/0x230 net/socket.c: 2565 __do_sys_sendmsg net/socket.c:2574 [en l\u00ednea] __se_sys_sendmsg net/socket.c:2572 [en l\u00ednea] __x64_sys_sendmsg+0x42/0x50 net/socket.c:2572 do_syscall_x64 arch/x86/entry/common.c:50 [en l\u00ednea] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 Entry_SYSCALL_64_after_hwframe+0x63/0xcd\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"net/sched/act_mpls.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2a2ea50870baa3fb4de0872c5b60828138654ca7\",\"lessThan\":\"2b157c3c5d6b8ddca48d53c9e662032f65af8d61\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2a2ea50870baa3fb4de0872c5b60828138654ca7\",\"lessThan\":\"453277feb41c2235cf2c0de9209eef962c401457\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2a2ea50870baa3fb4de0872c5b60828138654ca7\",\"lessThan\":\"9e2c38827cdc6fdd3bb375c8607fc04d289756f9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2a2ea50870baa3fb4de0872c5b60828138654ca7\",\"lessThan\":\"8a97b544b98e44f596219ebb290fd2ba2fd5d644\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2a2ea50870baa3fb4de0872c5b60828138654ca7\",\"lessThan\":\"9e17f99220d111ea031b44153fdfe364b0024ff2\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"net/sched/act_mpls.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.3\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.3\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.229\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.164\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.89\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.7\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"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\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-09-10T16:03:11.641593Z\",\"id\":\"CVE-2023-52906\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.3\",\"versionEndExcluding\":\"5.4.229\",\"matchCriteriaId\":\"6B9D0314-C8F6-4538-867F-2873DF2287F2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.5\",\"versionEndExcluding\":\"5.10.164\",\"matchCriteriaId\":\"CA742E66-32D2-459E-AB19-171C4DB3B1F4\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.11\",\"versionEndExcluding\":\"5.15.89\",\"matchCriteriaId\":\"E706841F-E788-4316-9B05-DA8EB60CE6B3\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"6.1.7\",\"matchCriteriaId\":\"9275C81F-AE96-4CDB-AD20-7DBD36E5D909\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.2:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"FF501633-2F44-4913-A8EE-B021929F49F6\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.2:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"2BDA597B-CAC1-4DF0-86F0-42E142C654E9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.2:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"725C78C9-12CE-406F-ABE8-0813A01D66E8\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2b157c3c5d6b8ddca48d53c9e662032f65af8d61\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/453277feb41c2235cf2c0de9209eef962c401457\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/8a97b544b98e44f596219ebb290fd2ba2fd5d644\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9e17f99220d111ea031b44153fdfe364b0024ff2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/9e2c38827cdc6fdd3bb375c8607fc04d289756f9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T14:34:07+00:00",
      "cve": "CVE-2023-52906",
      "id": "CVE-2023-52906",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_affected": "198",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net/sched: act_mpls: Fix warning during failed attribute validation",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-52906.json",
      "version": "3"
    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-52906\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T16:03:11.641593Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:18.240Z\"}}], \"cna\": {\"title\": \"net/sched: act_mpls: Fix warning during failed attribute validation\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2a2ea50870ba\", \"lessThan\": \"2b157c3c5d6b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2a2ea50870ba\", \"lessThan\": \"453277feb41c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2a2ea50870ba\", \"lessThan\": \"9e2c38827cdc\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2a2ea50870ba\", \"lessThan\": \"8a97b544b98e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"2a2ea50870ba\", \"lessThan\": \"9e17f99220d1\", \"versionType\": \"git\"}], \"programFiles\": [\"net/sched/act_mpls.c\"], \"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\": \"5.4.229\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.164\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.89\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.7\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.2\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/sched/act_mpls.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/2b157c3c5d6b8ddca48d53c9e662032f65af8d61\"}, {\"url\": \"https://git.kernel.org/stable/c/453277feb41c2235cf2c0de9209eef962c401457\"}, {\"url\": \"https://git.kernel.org/stable/c/9e2c38827cdc6fdd3bb375c8607fc04d289756f9\"}, {\"url\": \"https://git.kernel.org/stable/c/8a97b544b98e44f596219ebb290fd2ba2fd5d644\"}, {\"url\": \"https://git.kernel.org/stable/c/9e17f99220d111ea031b44153fdfe364b0024ff2\"}], \"x_generator\": {\"engine\": \"bippy-9e1c9544281a\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet/sched: act_mpls: Fix warning during failed attribute validation\\n\\nThe \u0027TCA_MPLS_LABEL\u0027 attribute is of \u0027NLA_U32\u0027 type, but has a\\nvalidation type of \u0027NLA_VALIDATE_FUNCTION\u0027. This is an invalid\\ncombination according to the comment above \u0027struct nla_policy\u0027:\\n\\n\\\"\\nMeaning of `validate\u0027 field, use via NLA_POLICY_VALIDATE_FN:\\n   NLA_BINARY           Validation function called for the attribute.\\n   All other            Unused - but note that it\u0027s a union\\n\\\"\\n\\nThis can trigger the warning [1] in nla_get_range_unsigned() when\\nvalidation of the attribute fails. Despite being of \u0027NLA_U32\u0027 type, the\\nassociated \u0027min\u0027/\u0027max\u0027 fields in the policy are negative as they are\\naliased by the \u0027validate\u0027 field.\\n\\nFix by changing the attribute type to \u0027NLA_BINARY\u0027 which is consistent\\nwith the above comment and all other users of NLA_POLICY_VALIDATE_FN().\\nAs a result, move the length validation to the validation function.\\n\\nNo regressions in MPLS tests:\\n\\n # ./tdc.py -f tc-tests/actions/mpls.json\\n [...]\\n # echo $?\\n 0\\n\\n[1]\\nWARNING: CPU: 0 PID: 17743 at lib/nlattr.c:118\\nnla_get_range_unsigned+0x1d8/0x1e0 lib/nlattr.c:117\\nModules linked in:\\nCPU: 0 PID: 17743 Comm: syz-executor.0 Not tainted 6.1.0-rc8 #3\\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS\\nrel-1.13.0-48-gd9c812dda519-prebuilt.qemu.org 04/01/2014\\nRIP: 0010:nla_get_range_unsigned+0x1d8/0x1e0 lib/nlattr.c:117\\n[...]\\nCall Trace:\\n \u003cTASK\u003e\\n __netlink_policy_dump_write_attr+0x23d/0x990 net/netlink/policy.c:310\\n netlink_policy_dump_write_attr+0x22/0x30 net/netlink/policy.c:411\\n netlink_ack_tlv_fill net/netlink/af_netlink.c:2454 [inline]\\n netlink_ack+0x546/0x760 net/netlink/af_netlink.c:2506\\n netlink_rcv_skb+0x1b7/0x240 net/netlink/af_netlink.c:2546\\n rtnetlink_rcv+0x18/0x20 net/core/rtnetlink.c:6109\\n netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]\\n netlink_unicast+0x5e9/0x6b0 net/netlink/af_netlink.c:1345\\n netlink_sendmsg+0x739/0x860 net/netlink/af_netlink.c:1921\\n sock_sendmsg_nosec net/socket.c:714 [inline]\\n sock_sendmsg net/socket.c:734 [inline]\\n ____sys_sendmsg+0x38f/0x500 net/socket.c:2482\\n ___sys_sendmsg net/socket.c:2536 [inline]\\n __sys_sendmsg+0x197/0x230 net/socket.c:2565\\n __do_sys_sendmsg net/socket.c:2574 [inline]\\n __se_sys_sendmsg net/socket.c:2572 [inline]\\n __x64_sys_sendmsg+0x42/0x50 net/socket.c:2572\\n do_syscall_x64 arch/x86/entry/common.c:50 [inline]\\n do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80\\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-11-04T14:54:57.643Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-52906\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-04T14:54:57.643Z\", \"dateReserved\": \"2024-08-21T06:07:11.015Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-08-21T06:10:47.121Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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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.

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  • 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.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


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