5.5

CVE-2024-46688

erofs: fix out-of-bound access when z_erofs_gbuf_growsize() partially fails

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

erofs: fix out-of-bound access when z_erofs_gbuf_growsize() partially fails

If z_erofs_gbuf_growsize() partially fails on a global buffer due to
memory allocation failure or fault injection (as reported by syzbot [1]),
new pages need to be freed by comparing to the existing pages to avoid
memory leaks.

However, the old gbuf->pages[] array may not be large enough, which can
lead to null-ptr-deref or out-of-bound access.

Fix this by checking against gbuf->nrpages in advance.

[1] https://lore.kernel.org/r/000000000000f7b96e062018c6e3@google.com
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 6.10 < 6.10.8
Linux ≫ Linux Kernel Version6.11 Updaterc1
Linux ≫ Linux Kernel Version6.11 Updaterc2
Linux ≫ Linux Kernel Version6.11 Updaterc3
Linux ≫ Linux Kernel Version6.11 Updaterc4
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.2% 0.098
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
NIST 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-787 Out-of-bounds Write

The product writes data past the end, or before the beginning, of the intended buffer.

https://git.kernel.org/stable/c/0005e01e1e875c5e27130c5e2ed0189749d1e08a
Patch
https://git.kernel.org/stable/c/49c0e081998008cde0c872c0ff9affa1ece4b878
Patch