7.8

CVE-2022-50367

fs: fix UAF/GPF bug in nilfs_mdt_destroy

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

fs: fix UAF/GPF bug in nilfs_mdt_destroy

In alloc_inode, inode_init_always() could return -ENOMEM if
security_inode_alloc() fails, which causes inode->i_private
uninitialized. Then nilfs_is_metadata_file_inode() returns
true and nilfs_free_inode() wrongly calls nilfs_mdt_destroy(),
which frees the uninitialized inode->i_private
and leads to crashes(e.g., UAF/GPF).

Fix this by moving security_inode_alloc just prior to
this_cpu_inc(nr_inodes)
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version < 4.9.331
Linux ≫ Linux Kernel Version >= 4.10 < 4.14.296
Linux ≫ Linux Kernel Version >= 4.15 < 4.19.262
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.218
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.148
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.73
Linux ≫ Linux Kernel Version >= 5.16 < 5.19.15
Linux ≫ Linux Kernel Version >= 6.0 < 6.0.1
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EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.21% 0.105
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 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
134c704f-9b21-4f2e-91b3-4a467353bcc0 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 Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.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/d1ff475d7c83289d0a7faef346ea3bbf90818bad
Patch
https://git.kernel.org/stable/c/c0aa76b0f17f59dd9c9d3463550a2986a1d592e4
Patch
https://git.kernel.org/stable/c/ec2aab115eb38ac4992ea2fcc2a02fbe7af5cf48
Patch
https://git.kernel.org/stable/c/70e4f70d54e0225f91814e8610477d65f33cefe4
Patch
https://git.kernel.org/stable/c/1e555c3ed1fce4b278aaebe18a64a934cece57d8
Patch
https://git.kernel.org/stable/c/64b79e632869ad3ef6c098a4731d559381da1115
Patch
https://git.kernel.org/stable/c/81de80330fa6907aec32eb54c5619059e6e36452
Patch
https://git.kernel.org/stable/c/2a96b532098284ecf8e4849b8b9e5fc7a28bdee9
Patch
https://git.kernel.org/stable/c/2e488f13755ffbb60f307e991b27024716a33b29
Patch