CVE-2026-23211 (GCVE-0-2026-23211)

Vulnerability from cvelistv5 – Published: 2026-02-18 14:16 – Updated: 2026-02-18 14:16
VLAI?
Title
mm, swap: restore swap_space attr aviod kernel panic
Summary
In the Linux kernel, the following vulnerability has been resolved: mm, swap: restore swap_space attr aviod kernel panic commit 8b47299a411a ("mm, swap: mark swap address space ro and add context debug check") made the swap address space read-only. It may lead to kernel panic if arch_prepare_to_swap returns a failure under heavy memory pressure as follows, el1_abort+0x40/0x64 el1h_64_sync_handler+0x48/0xcc el1h_64_sync+0x84/0x88 errseq_set+0x4c/0xb8 (P) __filemap_set_wb_err+0x20/0xd0 shrink_folio_list+0xc20/0x11cc evict_folios+0x1520/0x1be4 try_to_shrink_lruvec+0x27c/0x3dc shrink_one+0x9c/0x228 shrink_node+0xb3c/0xeac do_try_to_free_pages+0x170/0x4f0 try_to_free_pages+0x334/0x534 __alloc_pages_direct_reclaim+0x90/0x158 __alloc_pages_slowpath+0x334/0x588 __alloc_frozen_pages_noprof+0x224/0x2fc __folio_alloc_noprof+0x14/0x64 vma_alloc_zeroed_movable_folio+0x34/0x44 do_pte_missing+0xad4/0x1040 handle_mm_fault+0x4a4/0x790 do_page_fault+0x288/0x5f8 do_translation_fault+0x38/0x54 do_mem_abort+0x54/0xa8 Restore swap address space as not ro to avoid the panic.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 8b47299a411a178d572aaac31ff7ab33a8bd27e2 , < b0020cbd26380177b9fb8b7e75a8f7bdba79db20 (git)
Affected: 8b47299a411a178d572aaac31ff7ab33a8bd27e2 , < a0f3c0845a4ff68d403c568266d17e9cc553e561 (git)
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    Linux Linux Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.9 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "mm/swap.h",
            "mm/swap_state.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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          ],
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmm, swap: restore swap_space attr aviod kernel panic\n\ncommit 8b47299a411a (\"mm, swap: mark swap address space ro and add context\ndebug check\") made the swap address space read-only.  It may lead to\nkernel panic if arch_prepare_to_swap returns a failure under heavy memory\npressure as follows,\n\nel1_abort+0x40/0x64\nel1h_64_sync_handler+0x48/0xcc\nel1h_64_sync+0x84/0x88\nerrseq_set+0x4c/0xb8 (P)\n__filemap_set_wb_err+0x20/0xd0\nshrink_folio_list+0xc20/0x11cc\nevict_folios+0x1520/0x1be4\ntry_to_shrink_lruvec+0x27c/0x3dc\nshrink_one+0x9c/0x228\nshrink_node+0xb3c/0xeac\ndo_try_to_free_pages+0x170/0x4f0\ntry_to_free_pages+0x334/0x534\n__alloc_pages_direct_reclaim+0x90/0x158\n__alloc_pages_slowpath+0x334/0x588\n__alloc_frozen_pages_noprof+0x224/0x2fc\n__folio_alloc_noprof+0x14/0x64\nvma_alloc_zeroed_movable_folio+0x34/0x44\ndo_pte_missing+0xad4/0x1040\nhandle_mm_fault+0x4a4/0x790\ndo_page_fault+0x288/0x5f8\ndo_translation_fault+0x38/0x54\ndo_mem_abort+0x54/0xa8\n\nRestore swap address space as not ro to avoid the panic."
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      "providerMetadata": {
        "dateUpdated": "2026-02-18T14:16:27.015Z",
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        "shortName": "Linux"
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      "title": "mm, swap: restore swap_space attr aviod kernel panic",
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    "cveId": "CVE-2026-23211",
    "datePublished": "2026-02-18T14:16:27.015Z",
    "dateReserved": "2026-01-13T15:37:45.986Z",
    "dateUpdated": "2026-02-18T14:16:27.015Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
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It may lead to\\nkernel panic if arch_prepare_to_swap returns a failure under heavy memory\\npressure as follows,\\n\\nel1_abort+0x40/0x64\\nel1h_64_sync_handler+0x48/0xcc\\nel1h_64_sync+0x84/0x88\\nerrseq_set+0x4c/0xb8 (P)\\n__filemap_set_wb_err+0x20/0xd0\\nshrink_folio_list+0xc20/0x11cc\\nevict_folios+0x1520/0x1be4\\ntry_to_shrink_lruvec+0x27c/0x3dc\\nshrink_one+0x9c/0x228\\nshrink_node+0xb3c/0xeac\\ndo_try_to_free_pages+0x170/0x4f0\\ntry_to_free_pages+0x334/0x534\\n__alloc_pages_direct_reclaim+0x90/0x158\\n__alloc_pages_slowpath+0x334/0x588\\n__alloc_frozen_pages_noprof+0x224/0x2fc\\n__folio_alloc_noprof+0x14/0x64\\nvma_alloc_zeroed_movable_folio+0x34/0x44\\ndo_pte_missing+0xad4/0x1040\\nhandle_mm_fault+0x4a4/0x790\\ndo_page_fault+0x288/0x5f8\\ndo_translation_fault+0x38/0x54\\ndo_mem_abort+0x54/0xa8\\n\\nRestore swap address space as not ro to avoid the panic.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\\n\\nmm, swap: restaurar el atributo swap_space para evitar un kernel panic\\n\\nEl commit 8b47299a411a (\u0027mm, swap: marcar el espacio de direcciones de swap como ro y a\u00f1adir verificaci\u00f3n de depuraci\u00f3n de contexto\u0027) hizo que el espacio de direcciones de swap fuera de solo lectura. Esto puede llevar a un kernel panic si arch_prepare_to_swap devuelve un fallo bajo una fuerte presi\u00f3n de memoria, como sigue,\\n\\nel1_abort+0x40/0x64\\nel1h_64_sync_handler+0x48/0xcc\\nel1h_64_sync+0x84/0x88\\nerrseq_set+0x4c/0xb8 (P)\\n__filemap_set_wb_err+0x20/0xd0\\nshrink_folio_list+0xc20/0x11cc\\nevict_folios+0x1520/0x1be4\\ntry_to_shrink_lruvec+0x27c/0x3dc\\nshrink_one+0x9c/0x228\\nshrink_node+0xb3c/0xeac\\ndo_try_to_free_pages+0x170/0x4f0\\ntry_to_free_pages+0x334/0x534\\n__alloc_pages_direct_reclaim+0x90/0x158\\n__alloc_pages_slowpath+0x334/0x588\\n__alloc_frozen_pages_noprof+0x224/0x2fc\\n__folio_alloc_noprof+0x14/0x64\\nvma_alloc_zeroed_movable_folio+0x34/0x44\\ndo_pte_missing+0xad4/0x1040\\nhandle_mm_fault+0x4a4/0x790\\ndo_page_fault+0x288/0x5f8\\ndo_translation_fault+0x38/0x54\\ndo_mem_abort+0x54/0xa8\\n\\nRestaurar el espacio de direcciones de swap como no ro para evitar el p\u00e1nico.\"}],\"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:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"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\":\"6.18\",\"versionEndExcluding\":\"6.18.9\",\"matchCriteriaId\":\"64A5E20D-6D91-446C-A826-4E89EFEA0278\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"17B67AA7-40D6-4AFA-8459-F200F3D7CFD1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"C47E4CC9-C826-4FA9-B014-7FE3D9B318B2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F71D92C0-C023-48BD-B3B6-70B638EEE298\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"13580667-0A98-40CC-B29F-D12790B91BDB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"3EF854A1-ABB1-4E93-BE9A-44569EC76C0D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:*\",\"matchCriteriaId\":\"F5DC0CA6-F0AF-4DDF-A882-3DADB9A886A7\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/a0f3c0845a4ff68d403c568266d17e9cc553e561\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/b0020cbd26380177b9fb8b7e75a8f7bdba79db20\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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



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