5.5

CVE-2023-53396

ubifs: Fix memory leak in do_rename

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

ubifs: Fix memory leak in do_rename

If renaming a file in an encrypted directory, function
fscrypt_setup_filename allocates memory for a file name. This name is
never used, and before returning to the caller the memory for it is not
freed.

When running kmemleak on it we see that it is registered as a leak. The
report below is triggered by a simple program 'rename' that renames a
file in an encrypted directory:

  unreferenced object 0xffff888101502840 (size 32):
    comm "rename", pid 9404, jiffies 4302582475 (age 435.735s)
    backtrace:
      __kmem_cache_alloc_node
      __kmalloc
      fscrypt_setup_filename
      do_rename
      ubifs_rename
      vfs_rename
      do_renameat2

To fix this we can remove the call to fscrypt_setup_filename as it's not
needed.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 5.15.33 < 5.15.112
Linux ≫ Linux Kernel Version >= 5.16.19 < 5.17
Linux ≫ Linux Kernel Version >= 5.17.2 < 6.1.28
Linux ≫ Linux Kernel Version >= 6.2 < 6.2.15
Linux ≫ Linux Kernel Version >= 6.3 < 6.3.2
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.14% 0.035
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 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
134c704f-9b21-4f2e-91b3-4a467353bcc0 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-401 Missing Release of Memory after Effective Lifetime

The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

https://git.kernel.org/stable/c/43b2f7d690697182beed6f71aa57b7249d3cfc9c
Patch
https://git.kernel.org/stable/c/9f565752b328fe53c9e42b7d4e4d89a1da63d738
Patch
https://git.kernel.org/stable/c/7e264f67b7d6580eff5c2696961039fd05c69258
Patch
https://git.kernel.org/stable/c/517ddc0259d7a7231486bdafde8035c478bc4088
Patch
https://git.kernel.org/stable/c/3a36d20e012903f45714df2731261fdefac900cb
Patch