CVE-2024-53066: nfs: Fix KMSAN warning in decode_getfattr_attrs()
In the Linux kernel, the following vulnerability has been resolved:
nfs: Fix KMSAN warning in decodegetfattrattrs()
Fix the following KMSAN warning:
CPU: 1 UID: 0 PID: 7651 Comm: cp Tainted: G B Tainted: [B]=BADPAGE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009) ===================================================== ===================================================== BUG: KMSAN: uninit-value in decodegetfattrattrs+0x2d6d/0x2f90 decodegetfattrattrs+0x2d6d/0x2f90 decodegetfattrgeneric+0x806/0xb00 nfs4xdrdecgetattr+0x1de/0x240 rpcauthunwraprespdecode+0xab/0x100 rpcauthunwrapresp+0x95/0xc0 calldecode+0x4ff/0xb50 rpcexecute+0x57b/0x19d0 rpcexecute+0x368/0x5e0 rpcruntask+0xcfe/0xee0 nfs4procgetattr+0x5b5/0x990 nfsrevalidateinode+0x477/0xd00 nfsaccessgetcached+0x1021/0x1cc0 nfsdoaccess+0x9f/0xae0 nfspermission+0x1e4/0x8c0 inodepermission+0x356/0x6c0 linkpathwalk+0x958/0x1330 pathlookupat+0xce/0x6b0 filenamelookup+0x23e/0x770 vfsstatx+0xe7/0x970 vfsfstatat+0x1f2/0x2c0 sesysnewfstatat+0x67/0x880 x64sysnewfstatat+0xbd/0x120 x64syscall+0x1826/0x3cf0 dosyscall64+0xd0/0x1b0 entrySYSCALL64afterhwframe+0x77/0x7f
The KMSAN warning is triggered in decodegetfattrattrs(), when calling decodeattrmdsthreshold(). It appears that fattr->mdsthreshold is not initialized.
Fix the issue by initializing fattr->mdsthreshold to NULL in nfsfattrinit().
Other sources
This CVE was automatically created from a reference found in an email or other text. If you are reading this, then this CVE entry is probably erroneous, since this text should be replaced by the official CVE description automatically.
— Launchpad
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 5.10.234-1Fixed in 6.1.129-1Fixed in 6.1.135-1Fixed in 6.12.25-1Fixed in 6.12.27-1 - Upgrade
Upgrade
debian/linux-6.1to a version that resolves this vulnerability.Fixed in 6.1.129-1~deb11u1 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 5.15.173.1-1 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.6.64.2-1 - Configuration
Fix the KMSAN uninitialized-value warning by initializing fattr->mdsthreshold to NULL in nfs_fattr_init() before decode_getfattr_attrs() calls decode_attr_mdsthreshold().
Linux kernel NFS (decode_getfattr_attrs / nfs_fattr_init) Initialize fattr->mdsthreshold to NULL = NULL
Event History
Frequently Asked Questions
What is the severity of CVE-2024-53066?
CVE-2024-53066 is classified as a low-severity vulnerability in the Linux kernel.
How do I fix CVE-2024-53066?
To fix CVE-2024-53066, update your Linux kernel to the latest stable version that addresses this vulnerability.
Which versions of the Linux kernel are affected by CVE-2024-53066?
CVE-2024-53066 affects Linux kernel versions from 3.5 up to 6.12-rc6.
What is the nature of the vulnerability CVE-2024-53066?
CVE-2024-53066 resolves a KMSAN warning related to the decode_getfattr_attrs() function within the Linux kernel.
Is there any public information available for CVE-2024-53066?
Yes, details about CVE-2024-53066 can be found in the Linux kernel changelogs and security mailing lists.