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CVE-2025-40268

cifs: client: fix memory leak in smb3_fs_context_parse_param

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

cifs: client: fix memory leak in smb3_fs_context_parse_param

The user calls fsconfig twice, but when the program exits, free() only
frees ctx->source for the second fsconfig, not the first.
Regarding fc->source, there is no code in the fs context related to its
memory reclamation.

To fix this memory leak, release the source memory corresponding to ctx
or fc before each parsing.

syzbot reported:
BUG: memory leak
unreferenced object 0xffff888128afa360 (size 96):
  backtrace (crc 79c9c7ba):
    kstrdup+0x3c/0x80 mm/util.c:84
    smb3_fs_context_parse_param+0x229b/0x36c0 fs/smb/client/fs_context.c:1444

BUG: memory leak
unreferenced object 0xffff888112c7d900 (size 96):
  backtrace (crc 79c9c7ba):
    smb3_fs_context_fullpath+0x70/0x1b0 fs/smb/client/fs_context.c:629
    smb3_fs_context_parse_param+0x2266/0x36c0 fs/smb/client/fs_context.c:1438
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version af1a3d2ba9543e99d78914d8fb88b61d0531d9a1
Version < 868fc62811d3fabcf5685e14f36377a855d5412d
Status affected
Version af1a3d2ba9543e99d78914d8fb88b61d0531d9a1
Version < 48c17341577e25a22feb13d694374b61d974edbc
Status affected
Version af1a3d2ba9543e99d78914d8fb88b61d0531d9a1
Version < 4515743cc7a42e1d67468402a6420c195532a6fa
Status affected
Version af1a3d2ba9543e99d78914d8fb88b61d0531d9a1
Version < e8c73eb7db0a498cd4b22d2819e6ab1a6f506bd6
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 5.11
Status affected
Version 0
Version < 5.11
Status unaffected
Version <= 6.6.*
Version 6.6.117
Status unaffected
Version <= 6.12.*
Version 6.12.59
Status unaffected
Version <= 6.17.*
Version 6.17.9
Status unaffected
Version <= *
Version 6.18
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.04% 0.128
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
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