CVE-2024-46695

MEDIUM EPSS 12.3%
Published Sep 13, 20241y ago · Modified Jun 17, 20261w ago
4.4 CVSS 3.1
Medium
Find Similar
Published Sep 13, 2024 1y ago
Last Modified Jun 17, 2026 1w ago

Description

In the Linux kernel, the following vulnerability has been resolved: selinux,smack: don't bypass permissions check in inode_setsecctx hook Marek Gresko reports that the root user on an NFS client is able to change the security labels on files on an NFS filesystem that is exported with root squashing enabled. The end of the kerneldoc comment for __vfs_setxattr_noperm() states: * This function requires the caller to lock the inode's i_mutex before it * is executed. It also assumes that the caller will make the appropriate * permission checks. nfsd_setattr() does do permissions checking via fh_verify() and nfsd_permission(), but those don't do all the same permissions checks that are done by security_inode_setxattr() and its related LSM hooks do. Since nfsd_setattr() is the only consumer of security_inode_setsecctx(), simplest solution appears to be to replace the call to __vfs_setxattr_noperm() with a call to __vfs_setxattr_locked(). This fixes the above issue and has the added benefit of causing nfsd to recall conflicting delegations on a file when a client tries to change its security label.

CVSS Details

Base Score
4.4
Exploitability
0.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N
Attack Vector Local
Attack Complexity Low
Privileges Required High
User Interaction None
Scope Unchanged
Confidentiality None
Integrity High
Availability None

Threat Intelligence

EPSS Exploit Probability
12.3% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-276

Affected Products 7

VendorProductVersionRange
linuxlinux_kernel* <6.6.49
linuxlinux_kernel*≥6.7  –  <6.10.8
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any
linuxlinux_kernel6.11any

References 8

  • git.kernel.org https://git.kernel.org/stable/c/2dbc4b7bac60b02cc6e70d05bf6a7dfd551f9dda
  • git.kernel.org https://git.kernel.org/stable/c/459584258d47ec3cc6245a82e8a49c9d08eb8b57
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/76a0e79bc84f466999fa501fce5bf7a07641b8a7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/eebec98791d0137e455cc006411bb92a54250924
  • git.kernel.org https://git.kernel.org/stable/c/f71ec019257ba4f7ab198bd948c5902a207bad96
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fe0cd53791119f6287b6532af8ce41576d664930
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html
  • lists.debian.org https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/459584258d47ec3cc6245a82e8a49c9d08eb8b57
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/76a0e79bc84f466999fa501fce5bf7a07641b8a7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f71ec019257ba4f7ab198bd948c5902a207bad96
    Patch