CVE-2026-53018 (GCVE-0-2026-53018)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:29 – Updated: 2026-06-24 16:29
VLAI
Title
f2fs: avoid reading already updated pages during GC
Summary
In the Linux kernel, the following vulnerability has been resolved: f2fs: avoid reading already updated pages during GC We found the following issue during fuzz testing: page: refcount:3 mapcount:0 mapping:00000000b6e89c65 index:0x18b2dc pfn:0x161ba9 memcg:f8ffff800e269c00 aops:f2fs_meta_aops ino:2 flags: 0x52880000000080a9(locked|waiters|uptodate|lru|private|zone=1|kasantag=0x4a) raw: 52880000000080a9 fffffffec6e17588 fffffffec0ccc088 a7ffff8067063618 raw: 000000000018b2dc 0000000000000009 00000003ffffffff f8ffff800e269c00 page dumped because: VM_BUG_ON_FOLIO(folio_test_uptodate(folio)) page_owner tracks the page as allocated post_alloc_hook+0x58c/0x5ec prep_new_page+0x34/0x284 get_page_from_freelist+0x2dcc/0x2e8c __alloc_pages_noprof+0x280/0x76c __folio_alloc_noprof+0x18/0xac __filemap_get_folio+0x6bc/0xdc4 pagecache_get_page+0x3c/0x104 do_garbage_collect+0x5c78/0x77a4 f2fs_gc+0xd74/0x25f0 gc_thread_func+0xb28/0x2930 kthread+0x464/0x5d8 ret_from_fork+0x10/0x20 ------------[ cut here ]------------ kernel BUG at mm/filemap.c:1563! folio_end_read+0x140/0x168 f2fs_finish_read_bio+0x5c4/0xb80 f2fs_read_end_io+0x64c/0x708 bio_endio+0x85c/0x8c0 blk_update_request+0x690/0x127c scsi_end_request+0x9c/0xb8c scsi_io_completion+0xf0/0x250 scsi_finish_command+0x430/0x45c scsi_complete+0x178/0x6d4 blk_mq_complete_request+0xcc/0x104 scsi_done_internal+0x214/0x454 scsi_done+0x24/0x34 which is similar to the problem reported by syzbot: https://syzkaller.appspot.com/bug?extid=3686758660f980b402dc This case is consistent with the description in commit 9bf1a3f ("f2fs: avoid GC causing encrypted file corrupted"): Page 1 is moved from blkaddr A to blkaddr B by move_data_block, and after being written it is marked as uptodate. Then, Page 1 is moved from blkaddr B to blkaddr C, VM_BUG_ON_FOLIO was triggered in the endio initiated by ra_data_block. There is no need to read Page 1 again from blkaddr B, since it has already been updated. Therefore, avoid initiating I/O in this case.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 6aa58d8ad20a3323f42274c25820a6f54192422d , < 4623c251496b99c530ce225c05334f4eac8b933a (git)
Affected: 6aa58d8ad20a3323f42274c25820a6f54192422d , < b663ebb8a340eae5442e605b6acd2cff5677f016 (git)
Affected: 6aa58d8ad20a3323f42274c25820a6f54192422d , < 570e2ccc7cb35fe720106964e65060602d3d2ac4 (git)
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Linux Linux Affected: 4.19
Unaffected: 0 , < 4.19 (semver)
Unaffected: 6.18.33 , ≤ 6.18.* (semver)
Unaffected: 7.0.10 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/f2fs/gc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "4623c251496b99c530ce225c05334f4eac8b933a",
              "status": "affected",
              "version": "6aa58d8ad20a3323f42274c25820a6f54192422d",
              "versionType": "git"
            },
            {
              "lessThan": "b663ebb8a340eae5442e605b6acd2cff5677f016",
              "status": "affected",
              "version": "6aa58d8ad20a3323f42274c25820a6f54192422d",
              "versionType": "git"
            },
            {
              "lessThan": "570e2ccc7cb35fe720106964e65060602d3d2ac4",
              "status": "affected",
              "version": "6aa58d8ad20a3323f42274c25820a6f54192422d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/f2fs/gc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.19"
            },
            {
              "lessThan": "4.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.33",
                  "versionStartIncluding": "4.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.10",
                  "versionStartIncluding": "4.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "4.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: avoid reading already updated pages during GC\n\nWe found the following issue during fuzz testing:\n\npage: refcount:3 mapcount:0 mapping:00000000b6e89c65 index:0x18b2dc pfn:0x161ba9\nmemcg:f8ffff800e269c00\naops:f2fs_meta_aops ino:2\nflags: 0x52880000000080a9(locked|waiters|uptodate|lru|private|zone=1|kasantag=0x4a)\nraw: 52880000000080a9 fffffffec6e17588 fffffffec0ccc088 a7ffff8067063618\nraw: 000000000018b2dc 0000000000000009 00000003ffffffff f8ffff800e269c00\npage dumped because: VM_BUG_ON_FOLIO(folio_test_uptodate(folio))\npage_owner tracks the page as allocated\n post_alloc_hook+0x58c/0x5ec\n prep_new_page+0x34/0x284\n get_page_from_freelist+0x2dcc/0x2e8c\n __alloc_pages_noprof+0x280/0x76c\n __folio_alloc_noprof+0x18/0xac\n __filemap_get_folio+0x6bc/0xdc4\n pagecache_get_page+0x3c/0x104\n do_garbage_collect+0x5c78/0x77a4\n f2fs_gc+0xd74/0x25f0\n gc_thread_func+0xb28/0x2930\n kthread+0x464/0x5d8\n ret_from_fork+0x10/0x20\n------------[ cut here ]------------\nkernel BUG at mm/filemap.c:1563!\n folio_end_read+0x140/0x168\n f2fs_finish_read_bio+0x5c4/0xb80\n f2fs_read_end_io+0x64c/0x708\n bio_endio+0x85c/0x8c0\n blk_update_request+0x690/0x127c\n scsi_end_request+0x9c/0xb8c\n scsi_io_completion+0xf0/0x250\n scsi_finish_command+0x430/0x45c\n scsi_complete+0x178/0x6d4\n blk_mq_complete_request+0xcc/0x104\n scsi_done_internal+0x214/0x454\n scsi_done+0x24/0x34\n\nwhich is similar to the problem reported by syzbot:\nhttps://syzkaller.appspot.com/bug?extid=3686758660f980b402dc\n\nThis case is consistent with the description in commit 9bf1a3f\n(\"f2fs: avoid GC causing encrypted file corrupted\"):\nPage 1 is moved from blkaddr A to blkaddr B by move_data_block, and after\nbeing written it is marked as uptodate. Then, Page 1 is moved from blkaddr\nB to blkaddr C, VM_BUG_ON_FOLIO was triggered in the endio initiated by\nra_data_block.\n\nThere is no need to read Page 1 again from blkaddr B, since it has already\nbeen updated. Therefore, avoid initiating I/O in this case."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-24T16:29:28.051Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/4623c251496b99c530ce225c05334f4eac8b933a"
        },
        {
          "url": "https://git.kernel.org/stable/c/b663ebb8a340eae5442e605b6acd2cff5677f016"
        },
        {
          "url": "https://git.kernel.org/stable/c/570e2ccc7cb35fe720106964e65060602d3d2ac4"
        }
      ],
      "title": "f2fs: avoid reading already updated pages during GC",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-53018",
    "datePublished": "2026-06-24T16:29:28.051Z",
    "dateReserved": "2026-06-09T07:44:35.378Z",
    "dateUpdated": "2026-06-24T16:29:28.051Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-53018",
      "date": "2026-07-02",
      "epss": "0.00166",
      "percentile": "0.0615"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-53018\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-06-24T17:17:13.120\",\"lastModified\":\"2026-06-24T17:17:13.120\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nf2fs: avoid reading already updated pages during GC\\n\\nWe found the following issue during fuzz testing:\\n\\npage: refcount:3 mapcount:0 mapping:00000000b6e89c65 index:0x18b2dc pfn:0x161ba9\\nmemcg:f8ffff800e269c00\\naops:f2fs_meta_aops ino:2\\nflags: 0x52880000000080a9(locked|waiters|uptodate|lru|private|zone=1|kasantag=0x4a)\\nraw: 52880000000080a9 fffffffec6e17588 fffffffec0ccc088 a7ffff8067063618\\nraw: 000000000018b2dc 0000000000000009 00000003ffffffff f8ffff800e269c00\\npage dumped because: VM_BUG_ON_FOLIO(folio_test_uptodate(folio))\\npage_owner tracks the page as allocated\\n post_alloc_hook+0x58c/0x5ec\\n prep_new_page+0x34/0x284\\n get_page_from_freelist+0x2dcc/0x2e8c\\n __alloc_pages_noprof+0x280/0x76c\\n __folio_alloc_noprof+0x18/0xac\\n __filemap_get_folio+0x6bc/0xdc4\\n pagecache_get_page+0x3c/0x104\\n do_garbage_collect+0x5c78/0x77a4\\n f2fs_gc+0xd74/0x25f0\\n gc_thread_func+0xb28/0x2930\\n kthread+0x464/0x5d8\\n ret_from_fork+0x10/0x20\\n------------[ cut here ]------------\\nkernel BUG at mm/filemap.c:1563!\\n folio_end_read+0x140/0x168\\n f2fs_finish_read_bio+0x5c4/0xb80\\n f2fs_read_end_io+0x64c/0x708\\n bio_endio+0x85c/0x8c0\\n blk_update_request+0x690/0x127c\\n scsi_end_request+0x9c/0xb8c\\n scsi_io_completion+0xf0/0x250\\n scsi_finish_command+0x430/0x45c\\n scsi_complete+0x178/0x6d4\\n blk_mq_complete_request+0xcc/0x104\\n scsi_done_internal+0x214/0x454\\n scsi_done+0x24/0x34\\n\\nwhich is similar to the problem reported by syzbot:\\nhttps://syzkaller.appspot.com/bug?extid=3686758660f980b402dc\\n\\nThis case is consistent with the description in commit 9bf1a3f\\n(\\\"f2fs: avoid GC causing encrypted file corrupted\\\"):\\nPage 1 is moved from blkaddr A to blkaddr B by move_data_block, and after\\nbeing written it is marked as uptodate. Then, Page 1 is moved from blkaddr\\nB to blkaddr C, VM_BUG_ON_FOLIO was triggered in the endio initiated by\\nra_data_block.\\n\\nThere is no need to read Page 1 again from blkaddr B, since it has already\\nbeen updated. Therefore, avoid initiating I/O in this case.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/f2fs/gc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6aa58d8ad20a3323f42274c25820a6f54192422d\",\"lessThan\":\"4623c251496b99c530ce225c05334f4eac8b933a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6aa58d8ad20a3323f42274c25820a6f54192422d\",\"lessThan\":\"b663ebb8a340eae5442e605b6acd2cff5677f016\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6aa58d8ad20a3323f42274c25820a6f54192422d\",\"lessThan\":\"570e2ccc7cb35fe720106964e65060602d3d2ac4\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/f2fs/gc.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"4.19\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"4.19\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.33\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.10\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4623c251496b99c530ce225c05334f4eac8b933a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/570e2ccc7cb35fe720106964e65060602d3d2ac4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b663ebb8a340eae5442e605b6acd2cff5677f016\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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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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  • 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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