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CVE-2024-42296 (GCVE-0-2024-42296)

Vulnerability from cvelistv5 – Published: 2024-08-17 09:09 – Updated: 2026-08-05 11:36
VLAI
Title
f2fs: fix return value of f2fs_convert_inline_inode()
Summary
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix return value of f2fs_convert_inline_inode() If device is readonly, make f2fs_convert_inline_inode() return EROFS instead of zero, otherwise it may trigger panic during writeback of inline inode's dirty page as below: f2fs_write_single_data_page+0xbb6/0x1e90 fs/f2fs/data.c:2888 f2fs_write_cache_pages fs/f2fs/data.c:3187 [inline] __f2fs_write_data_pages fs/f2fs/data.c:3342 [inline] f2fs_write_data_pages+0x1efe/0x3a90 fs/f2fs/data.c:3369 do_writepages+0x359/0x870 mm/page-writeback.c:2634 filemap_fdatawrite_wbc+0x125/0x180 mm/filemap.c:397 __filemap_fdatawrite_range mm/filemap.c:430 [inline] file_write_and_wait_range+0x1aa/0x290 mm/filemap.c:788 f2fs_do_sync_file+0x68a/0x1ae0 fs/f2fs/file.c:276 generic_write_sync include/linux/fs.h:2806 [inline] f2fs_file_write_iter+0x7bd/0x24e0 fs/f2fs/file.c:4977 call_write_iter include/linux/fs.h:2114 [inline] new_sync_write fs/read_write.c:497 [inline] vfs_write+0xa72/0xc90 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 16:10 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 , < 70f5ef5f33c333cfb286116fa3af74ac9bc84f1b (git)
Affected: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 , < 47a8ddcdcaccd9b891db4574795e46a33a121ac2 (git)
Affected: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 , < 077f0e24b27c4b44841593c7edbd1993be9eecb5 (git)
Affected: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 , < 1e7725814361c8c008d131db195cef8274ff26b8 (git)
Affected: 98e4da8ca301e062d79ae168c67e56f3c3de3ce4 , < a8eb3de28e7a365690c61161e7a07a4fc7c60bbf (git)
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Linux Linux Affected: 3.8
Unaffected: 0 , < 3.8 (semver)
Unaffected: 5.15.165 , ≤ 5.15.* (semver)
Unaffected: 6.1.103 , ≤ 6.1.* (semver)
Unaffected: 6.6.44 , ≤ 6.6.* (semver)
Unaffected: 6.10.3 , ≤ 6.10.* (semver)
Unaffected: 6.11 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix return value of f2fs_convert_inline_inode()\n\nIf device is readonly, make f2fs_convert_inline_inode()\nreturn EROFS instead of zero, otherwise it may trigger\npanic during writeback of inline inode\u0027s dirty page as\nbelow:\n\n f2fs_write_single_data_page+0xbb6/0x1e90 fs/f2fs/data.c:2888\n f2fs_write_cache_pages fs/f2fs/data.c:3187 [inline]\n __f2fs_write_data_pages fs/f2fs/data.c:3342 [inline]\n f2fs_write_data_pages+0x1efe/0x3a90 fs/f2fs/data.c:3369\n do_writepages+0x359/0x870 mm/page-writeback.c:2634\n filemap_fdatawrite_wbc+0x125/0x180 mm/filemap.c:397\n __filemap_fdatawrite_range mm/filemap.c:430 [inline]\n file_write_and_wait_range+0x1aa/0x290 mm/filemap.c:788\n f2fs_do_sync_file+0x68a/0x1ae0 fs/f2fs/file.c:276\n generic_write_sync include/linux/fs.h:2806 [inline]\n f2fs_file_write_iter+0x7bd/0x24e0 fs/f2fs/file.c:4977\n call_write_iter include/linux/fs.h:2114 [inline]\n new_sync_write fs/read_write.c:497 [inline]\n vfs_write+0xa72/0xc90 fs/read_write.c:590\n ksys_write+0x1a0/0x2c0 fs/read_write.c:643\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f"
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            "version": "3.1"
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              "value": "AV:L - The bug is reached entirely through local filesystem syscalls \u2014 `write()`/`fsync()` or an `mmap(MAP_SHARED)` store \u2014 against a file on a locally mounted f2fs. No network or physical component is involved in triggering it.\nAC:L - Once the f2fs is in the affected state (backing device read-only while mounted rw \u2014 a real steady state on wear-out eMMC/UFS, write-protected SD/USB media, RO dm tables, or a multi-device f2fs with one RO member), the trigger is deterministic and single-threaded: create a file small enough to stay inline, then mmap-write it or write past `MAX_INLINE_DATA` and fsync. There is no race to win and no memory layout to groom, and the attacker can repeat it at will.\nPR:L - Any unprivileged local user holding a writable fd to a file on the affected f2fs \u2014 their own file in a home directory, /tmp, or /data/local/tmp \u2014 can reach both `f2fs_vm_page_mkwrite()` and the writeback path. No capability, ioctl gate, or mount privilege is required.\nUI:N - No victim action is needed; the attacker performs the write or page fault entirely on their own file. The read-only device condition is a pre-existing system/hardware state, not an interaction solicited from a user.\nS:U - The BUG_ON, the corrupted `i_addr[]`/inline region, and any resulting data access all live inside the kernel and the same f2fs instance. No VM, IOMMU, or sandbox boundary is crossed.\nC:H - The resulting inode state (F2FS_INLINE_DATA set with real block addresses in the overlapping `i_addr[]` array) is the same corruption class as CVE-2024-44942; on-disk block addresses become readable as file content, and once the inline flag is cleared via `f2fs_convert_inline_page()`\u0027s `clear_out` path without truncating the region, the user controls their file\u0027s block map and can read data blocks belonging to other files on the filesystem.\nI:H - `f2fs_get_block_locked()` stamps block addresses over the inline data area while `f2fs_write_inline_data()`\u0027s `memcpy_from_page()` stamps user-controlled bytes over the block address array, giving mutually corrupting writes to inode metadata; on a multi-device f2fs with one RO member the rest of the volume stays writable, so this inconsistent inode can be committed to disk and later drive GC/truncate down attacker-influenced block addresses.\nA:H - The commit states it \"may trigger panic,\" and the shared syzbot report shows `kernel BUG at fs/f2fs/inline.c:258` in `f2fs_write_inline_data()`; with CONFIG_F2FS_CHECK_FS the `f2fs_bug_on()` at fs/f2fs/file.c:105 and fs/f2fs/inline.c:258 are BUG_ON, and without it the WARN_ON panics under panic_on_warn and otherwise leaves the filesystem flagged NEED_FSCK."
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    "dateReserved": "2024-07-30T07:40:12.269Z",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nf2fs: fix return value of f2fs_convert_inline_inode()\n\nIf device is readonly, make f2fs_convert_inline_inode()\nreturn EROFS instead of zero, otherwise it may trigger\npanic during writeback of inline inode\u0027s dirty page as\nbelow:\n\n f2fs_write_single_data_page+0xbb6/0x1e90 fs/f2fs/data.c:2888\n f2fs_write_cache_pages fs/f2fs/data.c:3187 [inline]\n __f2fs_write_data_pages fs/f2fs/data.c:3342 [inline]\n f2fs_write_data_pages+0x1efe/0x3a90 fs/f2fs/data.c:3369\n do_writepages+0x359/0x870 mm/page-writeback.c:2634\n filemap_fdatawrite_wbc+0x125/0x180 mm/filemap.c:397\n __filemap_fdatawrite_range mm/filemap.c:430 [inline]\n file_write_and_wait_range+0x1aa/0x290 mm/filemap.c:788\n f2fs_do_sync_file+0x68a/0x1ae0 fs/f2fs/file.c:276\n generic_write_sync include/linux/fs.h:2806 [inline]\n f2fs_file_write_iter+0x7bd/0x24e0 fs/f2fs/file.c:4977\n call_write_iter include/linux/fs.h:2114 [inline]\n new_sync_write fs/read_write.c:497 [inline]\n vfs_write+0xa72/0xc90 fs/read_write.c:590\n ksys_write+0x1a0/0x2c0 fs/read_write.c:643\n do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f"
        },
        {
          "lang": "es",
          "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: f2fs: corrige el valor de retorno de f2fs_convert_inline_inode() Si el dispositivo es de solo lectura, haga que f2fs_convert_inline_inode() devuelva EROFS en lugar de cero; de lo contrario, puede provocar p\u00e1nico durante la reescritura de la p\u00e1gina sucia del inodo en l\u00ednea como se muestra a continuaci\u00f3n : f2fs_write_single_data_page+0xbb6/0x1e90 fs/f2fs/data.c:2888 f2fs_write_cache_pages fs/f2fs/data.c:3187 [en l\u00ednea] __f2fs_write_data_pages fs/f2fs/data.c:3342 [en l\u00ednea] efe/0x3a90 fs/f2fs/ data.c:3369 do_writepages+0x359/0x870 mm/page-writeback.c:2634 filemap_fdatawrite_wbc+0x125/0x180 mm/filemap.c:397 __filemap_fdatawrite_range mm/filemap.c:430 [en l\u00ednea] file_write_and_wait_range+0x1aa/0x290 mm/filemap .c:788 f2fs_do_sync_file+0x68a/0x1ae0 fs/f2fs/file.c:276 generic_write_sync include/linux/fs.h:2806 [en l\u00ednea] f2fs_file_write_iter+0x7bd/0x24e0 fs/f2fs/file.c:4977 call_write_iter include/linux/ fs.h:2114 [en l\u00ednea] new_sync_write fs/read_write.c:497 [en l\u00ednea] vfs_write+0xa72/0xc90 fs/read_write.c:590 ksys_write+0x1a0/0x2c0 fs/read_write.c:643 do_syscall_x64 arch/x86/entry/ common.c:52 [en l\u00ednea] do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83 Entry_SYSCALL_64_after_hwframe+0x77/0x7f"
        }
      ],
      "id": "CVE-2024-42296",
      "lastModified": "2024-08-19T12:59:59.177",
      "published": "2024-08-17T09:15:10.080",
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}



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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.

Sightings

Author Source Type Date Other

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.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.