- Vulnerability/
- CVE-2022-49927
CVE-2022-49927: nfs4: Fix kmemleak when allocate slot failed
First published: Thu May 01 2025(Updated: )
In the Linux kernel, the following vulnerability has been resolved: nfs4: Fix kmemleak when allocate slot failed If one of the slot allocate failed, should cleanup all the other allocated slots, otherwise, the allocated slots will leak: unreferenced object 0xffff8881115aa100 (size 64): comm ""mount.nfs"", pid 679, jiffies 4294744957 (age 115.037s) hex dump (first 32 bytes): 00 cc 19 73 81 88 ff ff 00 a0 5a 11 81 88 ff ff ...s......Z..... 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000007a4c434a>] nfs4_find_or_create_slot+0x8e/0x130 [<000000005472a39c>] nfs4_realloc_slot_table+0x23f/0x270 [<00000000cd8ca0eb>] nfs40_init_client+0x4a/0x90 [<00000000128486db>] nfs4_init_client+0xce/0x270 [<000000008d2cacad>] nfs4_set_client+0x1a2/0x2b0 [<000000000e593b52>] nfs4_create_server+0x300/0x5f0 [<00000000e4425dd2>] nfs4_try_get_tree+0x65/0x110 [<00000000d3a6176f>] vfs_get_tree+0x41/0xf0 [<0000000016b5ad4c>] path_mount+0x9b3/0xdd0 [<00000000494cae71>] __x64_sys_mount+0x190/0x1d0 [<000000005d56bdec>] do_syscall_64+0x35/0x80 [<00000000687c9ae4>] entry_SYSCALL_64_after_hwframe+0x46/0xb0
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel |
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Reference Links
- https://git.kernel.org/stable/c/84b5cb476903003ae9ca88f32b57ff0eaefa6d4c
- https://git.kernel.org/stable/c/aae35a0c8a775fa4afa6a4e7dab3f936f1f89bbb
- https://git.kernel.org/stable/c/86ce0e93cf6fb4d0c447323ac66577c642628b9d
- https://git.kernel.org/stable/c/925cb538bd5851154602818dc80bf4b4d924c127
- https://git.kernel.org/stable/c/45aea4fbf61e205649c29200726b9f45c1718a67
- https://git.kernel.org/stable/c/24641993a7dce6b1628645f4e1d97ca06c9f765d
- https://git.kernel.org/stable/c/db333ae981fb8843c383aa7dbf62cc682597d401
- https://git.kernel.org/stable/c/7e8436728e22181c3f12a5dbabd35ed3a8b8c593
Frequently Asked Questions
What is the severity of CVE-2022-49927?
CVE-2022-49927 has a moderate severity rating due to the potential for memory leaks in the Linux kernel.
How do I fix CVE-2022-49927?
To resolve CVE-2022-49927, ensure you update your Linux kernel to the patched version that includes the fix for the NFS4 slot allocation.
What systems are affected by CVE-2022-49927?
CVE-2022-49927 affects various versions of the Linux kernel where NFS4 functionality is implemented.
What are the potential impacts of CVE-2022-49927?
The potential impacts of CVE-2022-49927 include increased memory usage and possible denial of service due to memory leaks.
Has CVE-2022-49927 been publicly disclosed?
Yes, CVE-2022-49927 has been publicly disclosed and is documented in the Common Vulnerabilities and Exposures database.
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