CVE-2025-21675 (GCVE-0-2025-21675)

Vulnerability from cvelistv5 – Published: 2025-01-31 11:25 – Updated: 2025-11-03 20:58
VLAI?
Title
net/mlx5: Clear port select structure when fail to create
Summary
In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Clear port select structure when fail to create Clear the port select structure on error so no stale values left after definers are destroyed. That's because the mlx5_lag_destroy_definers() always try to destroy all lag definers in the tt_map, so in the flow below lag definers get double-destroyed and cause kernel crash: mlx5_lag_port_sel_create() mlx5_lag_create_definers() mlx5_lag_create_definer() <- Failed on tt 1 mlx5_lag_destroy_definers() <- definers[tt=0] gets destroyed mlx5_lag_port_sel_create() mlx5_lag_create_definers() mlx5_lag_create_definer() <- Failed on tt 0 mlx5_lag_destroy_definers() <- definers[tt=0] gets double-destroyed Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008 Mem abort info: ESR = 0x0000000096000005 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x05: level 1 translation fault Data abort info: ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 user pgtable: 64k pages, 48-bit VAs, pgdp=0000000112ce2e00 [0000000000000008] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000 Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP Modules linked in: iptable_raw bonding ip_gre ip6_gre gre ip6_tunnel tunnel6 geneve ip6_udp_tunnel udp_tunnel ipip tunnel4 ip_tunnel rdma_ucm(OE) rdma_cm(OE) iw_cm(OE) ib_ipoib(OE) ib_cm(OE) ib_umad(OE) mlx5_ib(OE) ib_uverbs(OE) mlx5_fwctl(OE) fwctl(OE) mlx5_core(OE) mlxdevm(OE) ib_core(OE) mlxfw(OE) memtrack(OE) mlx_compat(OE) openvswitch nsh nf_conncount psample xt_conntrack xt_MASQUERADE nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo xt_addrtype iptable_filter iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 br_netfilter bridge stp llc netconsole overlay efi_pstore sch_fq_codel zram ip_tables crct10dif_ce qemu_fw_cfg fuse ipv6 crc_ccitt [last unloaded: mlx_compat(OE)] CPU: 3 UID: 0 PID: 217 Comm: kworker/u53:2 Tainted: G OE 6.11.0+ #2 Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015 Workqueue: mlx5_lag mlx5_do_bond_work [mlx5_core] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : mlx5_del_flow_rules+0x24/0x2c0 [mlx5_core] lr : mlx5_lag_destroy_definer+0x54/0x100 [mlx5_core] sp : ffff800085fafb00 x29: ffff800085fafb00 x28: ffff0000da0c8000 x27: 0000000000000000 x26: ffff0000da0c8000 x25: ffff0000da0c8000 x24: ffff0000da0c8000 x23: ffff0000c31f81a0 x22: 0400000000000000 x21: ffff0000da0c8000 x20: 0000000000000000 x19: 0000000000000001 x18: 0000000000000000 x17: 0000000000000000 x16: 0000000000000000 x15: 0000ffff8b0c9350 x14: 0000000000000000 x13: ffff800081390d18 x12: ffff800081dc3cc0 x11: 0000000000000001 x10: 0000000000000b10 x9 : ffff80007ab7304c x8 : ffff0000d00711f0 x7 : 0000000000000004 x6 : 0000000000000190 x5 : ffff00027edb3010 x4 : 0000000000000000 x3 : 0000000000000000 x2 : ffff0000d39b8000 x1 : ffff0000d39b8000 x0 : 0400000000000000 Call trace: mlx5_del_flow_rules+0x24/0x2c0 [mlx5_core] mlx5_lag_destroy_definer+0x54/0x100 [mlx5_core] mlx5_lag_destroy_definers+0xa0/0x108 [mlx5_core] mlx5_lag_port_sel_create+0x2d4/0x6f8 [mlx5_core] mlx5_activate_lag+0x60c/0x6f8 [mlx5_core] mlx5_do_bond_work+0x284/0x5c8 [mlx5_core] process_one_work+0x170/0x3e0 worker_thread+0x2d8/0x3e0 kthread+0x11c/0x128 ret_from_fork+0x10/0x20 Code: a9025bf5 aa0003f6 a90363f7 f90023f9 (f9400400) ---[ end trace 0000000000000000 ]---
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
Impacted products
Vendor Product Version
Linux Linux Affected: dc48516ec7d369c6b80bf9f14d774287b6c428aa , < efc92a260e23cf9fafb0b6f6c9beb6f8df93fab4 (git)
Affected: dc48516ec7d369c6b80bf9f14d774287b6c428aa , < 473bc285378f49aa27e5b3e95a6d5ed12995d654 (git)
Affected: dc48516ec7d369c6b80bf9f14d774287b6c428aa , < 1f6e619ef2a4def555b14ac2aeb4304bfccad59b (git)
Affected: dc48516ec7d369c6b80bf9f14d774287b6c428aa , < 5641e82cb55b4ecbc6366a499300917d2f3e6790 (git)
Create a notification for this product.
    Linux Linux Affected: 5.16
Unaffected: 0 , < 5.16 (semver)
Unaffected: 6.1.127 , ≤ 6.1.* (semver)
Unaffected: 6.6.74 , ≤ 6.6.* (semver)
Unaffected: 6.12.11 , ≤ 6.12.* (semver)
Unaffected: 6.13 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: Clear port select structure when fail to create\n\nClear the port select structure on error so no stale values left after\ndefiners are destroyed. That\u0027s because the mlx5_lag_destroy_definers()\nalways try to destroy all lag definers in the tt_map, so in the flow\nbelow lag definers get double-destroyed and cause kernel crash:\n\n  mlx5_lag_port_sel_create()\n    mlx5_lag_create_definers()\n      mlx5_lag_create_definer()     \u003c- Failed on tt 1\n        mlx5_lag_destroy_definers() \u003c- definers[tt=0] gets destroyed\n  mlx5_lag_port_sel_create()\n    mlx5_lag_create_definers()\n      mlx5_lag_create_definer()     \u003c- Failed on tt 0\n        mlx5_lag_destroy_definers() \u003c- definers[tt=0] gets double-destroyed\n\n Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008\n Mem abort info:\n   ESR = 0x0000000096000005\n   EC = 0x25: DABT (current EL), IL = 32 bits\n   SET = 0, FnV = 0\n   EA = 0, S1PTW = 0\n   FSC = 0x05: level 1 translation fault\n Data abort info:\n   ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000\n   CM = 0, WnR = 0, TnD = 0, TagAccess = 0\n   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\n user pgtable: 64k pages, 48-bit VAs, pgdp=0000000112ce2e00\n [0000000000000008] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000\n Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP\n Modules linked in: iptable_raw bonding ip_gre ip6_gre gre ip6_tunnel tunnel6 geneve ip6_udp_tunnel udp_tunnel ipip tunnel4 ip_tunnel rdma_ucm(OE) rdma_cm(OE) iw_cm(OE) ib_ipoib(OE) ib_cm(OE) ib_umad(OE) mlx5_ib(OE) ib_uverbs(OE) mlx5_fwctl(OE) fwctl(OE) mlx5_core(OE) mlxdevm(OE) ib_core(OE) mlxfw(OE) memtrack(OE) mlx_compat(OE) openvswitch nsh nf_conncount psample xt_conntrack xt_MASQUERADE nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo xt_addrtype iptable_filter iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 br_netfilter bridge stp llc netconsole overlay efi_pstore sch_fq_codel zram ip_tables crct10dif_ce qemu_fw_cfg fuse ipv6 crc_ccitt [last unloaded: mlx_compat(OE)]\n  CPU: 3 UID: 0 PID: 217 Comm: kworker/u53:2 Tainted: G           OE      6.11.0+ #2\n  Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE\n  Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015\n  Workqueue: mlx5_lag mlx5_do_bond_work [mlx5_core]\n  pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\n  pc : mlx5_del_flow_rules+0x24/0x2c0 [mlx5_core]\n  lr : mlx5_lag_destroy_definer+0x54/0x100 [mlx5_core]\n  sp : ffff800085fafb00\n  x29: ffff800085fafb00 x28: ffff0000da0c8000 x27: 0000000000000000\n  x26: ffff0000da0c8000 x25: ffff0000da0c8000 x24: ffff0000da0c8000\n  x23: ffff0000c31f81a0 x22: 0400000000000000 x21: ffff0000da0c8000\n  x20: 0000000000000000 x19: 0000000000000001 x18: 0000000000000000\n  x17: 0000000000000000 x16: 0000000000000000 x15: 0000ffff8b0c9350\n  x14: 0000000000000000 x13: ffff800081390d18 x12: ffff800081dc3cc0\n  x11: 0000000000000001 x10: 0000000000000b10 x9 : ffff80007ab7304c\n  x8 : ffff0000d00711f0 x7 : 0000000000000004 x6 : 0000000000000190\n  x5 : ffff00027edb3010 x4 : 0000000000000000 x3 : 0000000000000000\n  x2 : ffff0000d39b8000 x1 : ffff0000d39b8000 x0 : 0400000000000000\n  Call trace:\n   mlx5_del_flow_rules+0x24/0x2c0 [mlx5_core]\n   mlx5_lag_destroy_definer+0x54/0x100 [mlx5_core]\n   mlx5_lag_destroy_definers+0xa0/0x108 [mlx5_core]\n   mlx5_lag_port_sel_create+0x2d4/0x6f8 [mlx5_core]\n   mlx5_activate_lag+0x60c/0x6f8 [mlx5_core]\n   mlx5_do_bond_work+0x284/0x5c8 [mlx5_core]\n   process_one_work+0x170/0x3e0\n   worker_thread+0x2d8/0x3e0\n   kthread+0x11c/0x128\n   ret_from_fork+0x10/0x20\n  Code: a9025bf5 aa0003f6 a90363f7 f90023f9 (f9400400)\n  ---[ end trace 0000000000000000 ]---"
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    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 5.5, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"NONE\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2025-21675\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-10-01T19:52:01.288500Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-476\", \"description\": \"CWE-476 NULL Pointer Dereference\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-10-01T15:58:56.633Z\"}}], \"cna\": {\"title\": \"net/mlx5: Clear port select structure when fail to create\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"dc48516ec7d369c6b80bf9f14d774287b6c428aa\", \"lessThan\": \"efc92a260e23cf9fafb0b6f6c9beb6f8df93fab4\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"dc48516ec7d369c6b80bf9f14d774287b6c428aa\", \"lessThan\": \"473bc285378f49aa27e5b3e95a6d5ed12995d654\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"dc48516ec7d369c6b80bf9f14d774287b6c428aa\", \"lessThan\": \"1f6e619ef2a4def555b14ac2aeb4304bfccad59b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"dc48516ec7d369c6b80bf9f14d774287b6c428aa\", \"lessThan\": \"5641e82cb55b4ecbc6366a499300917d2f3e6790\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/net/ethernet/mellanox/mlx5/core/lag/port_sel.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.16\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.16\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.1.127\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.74\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.11\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.13\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/ethernet/mellanox/mlx5/core/lag/port_sel.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/efc92a260e23cf9fafb0b6f6c9beb6f8df93fab4\"}, {\"url\": \"https://git.kernel.org/stable/c/473bc285378f49aa27e5b3e95a6d5ed12995d654\"}, {\"url\": \"https://git.kernel.org/stable/c/1f6e619ef2a4def555b14ac2aeb4304bfccad59b\"}, {\"url\": \"https://git.kernel.org/stable/c/5641e82cb55b4ecbc6366a499300917d2f3e6790\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnet/mlx5: Clear port select structure when fail to create\\n\\nClear the port select structure on error so no stale values left after\\ndefiners are destroyed. That\u0027s because the mlx5_lag_destroy_definers()\\nalways try to destroy all lag definers in the tt_map, so in the flow\\nbelow lag definers get double-destroyed and cause kernel crash:\\n\\n  mlx5_lag_port_sel_create()\\n    mlx5_lag_create_definers()\\n      mlx5_lag_create_definer()     \u003c- Failed on tt 1\\n        mlx5_lag_destroy_definers() \u003c- definers[tt=0] gets destroyed\\n  mlx5_lag_port_sel_create()\\n    mlx5_lag_create_definers()\\n      mlx5_lag_create_definer()     \u003c- Failed on tt 0\\n        mlx5_lag_destroy_definers() \u003c- definers[tt=0] gets double-destroyed\\n\\n Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008\\n Mem abort info:\\n   ESR = 0x0000000096000005\\n   EC = 0x25: DABT (current EL), IL = 32 bits\\n   SET = 0, FnV = 0\\n   EA = 0, S1PTW = 0\\n   FSC = 0x05: level 1 translation fault\\n Data abort info:\\n   ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000\\n   CM = 0, WnR = 0, TnD = 0, TagAccess = 0\\n   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\\n user pgtable: 64k pages, 48-bit VAs, pgdp=0000000112ce2e00\\n [0000000000000008] pgd=0000000000000000, p4d=0000000000000000, pud=0000000000000000\\n Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP\\n Modules linked in: iptable_raw bonding ip_gre ip6_gre gre ip6_tunnel tunnel6 geneve ip6_udp_tunnel udp_tunnel ipip tunnel4 ip_tunnel rdma_ucm(OE) rdma_cm(OE) iw_cm(OE) ib_ipoib(OE) ib_cm(OE) ib_umad(OE) mlx5_ib(OE) ib_uverbs(OE) mlx5_fwctl(OE) fwctl(OE) mlx5_core(OE) mlxdevm(OE) ib_core(OE) mlxfw(OE) memtrack(OE) mlx_compat(OE) openvswitch nsh nf_conncount psample xt_conntrack xt_MASQUERADE nf_conntrack_netlink nfnetlink xfrm_user xfrm_algo xt_addrtype iptable_filter iptable_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 br_netfilter bridge stp llc netconsole overlay efi_pstore sch_fq_codel zram ip_tables crct10dif_ce qemu_fw_cfg fuse ipv6 crc_ccitt [last unloaded: mlx_compat(OE)]\\n  CPU: 3 UID: 0 PID: 217 Comm: kworker/u53:2 Tainted: G           OE      6.11.0+ #2\\n  Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODULE\\n  Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015\\n  Workqueue: mlx5_lag mlx5_do_bond_work [mlx5_core]\\n  pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)\\n  pc : mlx5_del_flow_rules+0x24/0x2c0 [mlx5_core]\\n  lr : mlx5_lag_destroy_definer+0x54/0x100 [mlx5_core]\\n  sp : ffff800085fafb00\\n  x29: ffff800085fafb00 x28: ffff0000da0c8000 x27: 0000000000000000\\n  x26: ffff0000da0c8000 x25: ffff0000da0c8000 x24: ffff0000da0c8000\\n  x23: ffff0000c31f81a0 x22: 0400000000000000 x21: ffff0000da0c8000\\n  x20: 0000000000000000 x19: 0000000000000001 x18: 0000000000000000\\n  x17: 0000000000000000 x16: 0000000000000000 x15: 0000ffff8b0c9350\\n  x14: 0000000000000000 x13: ffff800081390d18 x12: ffff800081dc3cc0\\n  x11: 0000000000000001 x10: 0000000000000b10 x9 : ffff80007ab7304c\\n  x8 : ffff0000d00711f0 x7 : 0000000000000004 x6 : 0000000000000190\\n  x5 : ffff00027edb3010 x4 : 0000000000000000 x3 : 0000000000000000\\n  x2 : ffff0000d39b8000 x1 : ffff0000d39b8000 x0 : 0400000000000000\\n  Call trace:\\n   mlx5_del_flow_rules+0x24/0x2c0 [mlx5_core]\\n   mlx5_lag_destroy_definer+0x54/0x100 [mlx5_core]\\n   mlx5_lag_destroy_definers+0xa0/0x108 [mlx5_core]\\n   mlx5_lag_port_sel_create+0x2d4/0x6f8 [mlx5_core]\\n   mlx5_activate_lag+0x60c/0x6f8 [mlx5_core]\\n   mlx5_do_bond_work+0x284/0x5c8 [mlx5_core]\\n   process_one_work+0x170/0x3e0\\n   worker_thread+0x2d8/0x3e0\\n   kthread+0x11c/0x128\\n   ret_from_fork+0x10/0x20\\n  Code: a9025bf5 aa0003f6 a90363f7 f90023f9 (f9400400)\\n  ---[ end trace 0000000000000000 ]---\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.127\", \"versionStartIncluding\": \"5.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.74\", \"versionStartIncluding\": \"5.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.11\", \"versionStartIncluding\": \"5.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.13\", \"versionStartIncluding\": \"5.16\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T07:18:49.451Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2025-21675\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-01T19:57:11.729Z\", \"dateReserved\": \"2024-12-29T08:45:45.737Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-01-31T11:25:37.457Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

Author Source Type Date

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.


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