CVE-2024-53066

nfs: Fix KMSAN warning in decode_getfattr_attrs()

MEDIUM

5.5

CVSS Score

Published: November 19, 2024 at 05:22 PM UTC

Updated: August 5, 2026 at 12:05 PM UTC

1 product affected across 1 vendorLinux Kernel

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Severity

MEDIUM5.5

Exploit prediction

EPSS 0.7%

SSVC

No known exploit

Description

In the Linux kernel, the following vulnerability has been resolved: nfs: Fix KMSAN warning in decode_getfattr_attrs() Fix the following KMSAN warning: CPU: 1 UID: 0 PID: 7651 Comm: cp Tainted: G B Tainted: [B]=BAD_PAGE Hardware name: QEMU Standard PC (Q35 + ICH9, 2009) ===================================================== ===================================================== BUG: KMSAN: uninit-value in decode_getfattr_attrs+0x2d6d/0x2f90 decode_getfattr_attrs+0x2d6d/0x2f90 decode_getfattr_generic+0x806/0xb00 nfs4_xdr_dec_getattr+0x1de/0x240 rpcauth_unwrap_resp_decode+0xab/0x100 rpcauth_unwrap_resp+0x95/0xc0 call_decode+0x4ff/0xb50 __rpc_execute+0x57b/0x19d0 rpc_execute+0x368/0x5e0 rpc_run_task+0xcfe/0xee0 nfs4_proc_getattr+0x5b5/0x990 __nfs_revalidate_inode+0x477/0xd00 nfs_access_get_cached+0x1021/0x1cc0 nfs_do_access+0x9f/0xae0 nfs_permission+0x1e4/0x8c0 inode_permission+0x356/0x6c0 link_path_walk+0x958/0x1330 path_lookupat+0xce/0x6b0 filename_lookup+0x23e/0x770 vfs_statx+0xe7/0x970 vfs_fstatat+0x1f2/0x2c0 __se_sys_newfstatat+0x67/0x880 __x64_sys_newfstatat+0xbd/0x120 x64_sys_call+0x1826/0x3cf0 do_syscall_64+0xd0/0x1b0 entry_SYSCALL_64_after_hwframe+0x77/0x7f The KMSAN warning is triggered in decode_getfattr_attrs(), when calling decode_attr_mdsthreshold(). It appears that fattr->mdsthreshold is not initialized. Fix the issue by initializing fattr->mdsthreshold to NULL in nfs_fattr_init().

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Linux Kernel · Linux

95%

3.5 ≤ v < 4.19.3243.5 ≤ v < 5.10.2303.5 ≤ v < 5.15.1723.5 ≤ v < 5.4.2863.5 ≤ v < 6.1.1173.5 ≤ v < 6.11.83.5 ≤ v < 6.123.5 ≤ v < 6.6.614.20 ≤ v < 5.4.2865.11 ≤ v < 5.15.1725.16 ≤ v < 6.1.1175.5 ≤ v < 5.10.2306.2 ≤ v < 6.6.616.7 ≤ v < 6.11.86.12 rc1 6.12 rc2 6.12 rc3 6.12 rc4 6.12 rc5 6.12 rc688034c3d88c2c48b215f2cc5eb22e564aa817f9c

Vendor states this is fixed in 25ffd294fef81a7f3cd9528adf21560c04d98747 (fixed)

Vendor states this is fixed in 8fc5ea9231af9122d227c9c13f5e578fca48d2e3 (fixed)

Vendor states this is fixed in 9b453e8b108a5a93a6e348cf2ba4c9c138314a00 (fixed)

Vendor states this is fixed in 9be0a21ae52b3b822d0eec4d14e909ab394f8a92 (fixed)

Vendor states this is fixed in bbfcd261cc068fe1cd02a4e871275074a0daa4e2 (fixed)

Vendor states this is fixed in dc270d7159699ad6d11decadfce9633f0f71c1db (fixed)

Vendor states this is fixed in f6b2b2b981af8e7d7c62d34143acefa4e1edfe8b (fixed)

Vendor states this is fixed in f749cb60a01f8391c760a1d6ecd938cadacf9549 (fixed)

Vendor states this is fixed in 3.5 (unaffected)

Vendor states this is fixed in 4.19.324 (unaffected)

Vendor states this is fixed in 5.10.230 (unaffected)

Vendor states this is fixed in 5.15.172 (unaffected)

Vendor states this is fixed in 5.4.286 (unaffected)

Vendor states this is fixed in 6.1.117 (unaffected)

Vendor states this is fixed in 6.11.8 (unaffected)

Vendor states this is fixed in 6.12 (unaffected)

Vendor states this is fixed in 6.6.61 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references