7.8

CVE-2023-52852

f2fs: compress: fix to avoid use-after-free on dic

In the Linux kernel, the following vulnerability has been resolved:

f2fs: compress: fix to avoid use-after-free on dic

Call trace:
 __memcpy+0x128/0x250
 f2fs_read_multi_pages+0x940/0xf7c
 f2fs_mpage_readpages+0x5a8/0x624
 f2fs_readahead+0x5c/0x110
 page_cache_ra_unbounded+0x1b8/0x590
 do_sync_mmap_readahead+0x1dc/0x2e4
 filemap_fault+0x254/0xa8c
 f2fs_filemap_fault+0x2c/0x104
 __do_fault+0x7c/0x238
 do_handle_mm_fault+0x11bc/0x2d14
 do_mem_abort+0x3a8/0x1004
 el0_da+0x3c/0xa0
 el0t_64_sync_handler+0xc4/0xec
 el0t_64_sync+0x1b4/0x1b8

In f2fs_read_multi_pages(), once f2fs_decompress_cluster() was called if
we hit cached page in compress_inode's cache, dic may be released, it needs
break the loop rather than continuing it, in order to avoid accessing
invalid dic pointer.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.13.19 < 5.15.139
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.63
Linux ≫ Linux Kernel Version >= 6.2 < 6.5.12
Linux ≫ Linux Kernel Version >= 6.6 < 6.6.2
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.24% 0.146
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://git.kernel.org/stable/c/8c4504cc0c64862740a6acb301e0cfa59580dbc5
Patch
https://git.kernel.org/stable/c/932ddb5c29e884cc6fac20417ece72ba4a35c401
Patch
https://git.kernel.org/stable/c/9375ea7f269093d7c884857ae1f47633a91f429c
Patch
https://git.kernel.org/stable/c/9d065aa52b6ee1b06f9c4eca881c9b4425a12ba2
Patch
https://git.kernel.org/stable/c/b0327c84e91a0f4f0abced8cb83ec86a7083f086
Patch