CVE-2022-49927

Summary

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

Affected Software

VendorProductVersion RangeStatus
LinuxLinuxabf79bb341bf52f75f295b850abdf5f78f584311 < 84b5cb476903003ae9ca88f32b57ff0eaefa6d4caffected
LinuxLinuxabf79bb341bf52f75f295b850abdf5f78f584311 < aae35a0c8a775fa4afa6a4e7dab3f936f1f89bbbaffected
LinuxLinuxabf79bb341bf52f75f295b850abdf5f78f584311 < 86ce0e93cf6fb4d0c447323ac66577c642628b9daffected
LinuxLinuxabf79bb341bf52f75f295b850abdf5f78f584311 < 925cb538bd5851154602818dc80bf4b4d924c127affected
LinuxLinuxabf79bb341bf52f75f295b850abdf5f78f584311 < 45aea4fbf61e205649c29200726b9f45c1718a67affected
LinuxLinuxabf79bb341bf52f75f295b850abdf5f78f584311 < 24641993a7dce6b1628645f4e1d97ca06c9f765daffected
LinuxLinuxabf79bb341bf52f75f295b850abdf5f78f584311 < db333ae981fb8843c383aa7dbf62cc682597d401affected
LinuxLinuxabf79bb341bf52f75f295b850abdf5f78f584311 < 7e8436728e22181c3f12a5dbabd35ed3a8b8c593affected
LinuxLinux3.12affected
LinuxLinux0 < 3.12unaffected
LinuxLinux4.9.333 <= 4.9.*unaffected
LinuxLinux4.14.299 <= 4.14.*unaffected
LinuxLinux4.19.265 <= 4.19.*unaffected
LinuxLinux5.4.224 <= 5.4.*unaffected
LinuxLinux5.10.154 <= 5.10.*unaffected
LinuxLinux5.15.78 <= 5.15.*unaffected
LinuxLinux6.0.8 <= 6.0.*unaffected
LinuxLinux6.1 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

References