Riskcovery

CVE-2022-49928

SUNRPC: Fix null-ptr-deref when xps sysfs alloc failed

State
Published
Severity
7.5 High
Published
May 1, 2025
Updated
Aug 5, 2026
Reserved
May 1, 2025

Read the record on cve.org

Description

In the Linux kernel, the following vulnerability has been resolved:

SUNRPC: Fix null-ptr-deref when xps sysfs alloc failed

There is a null-ptr-deref when xps sysfs alloc failed: BUG: KASAN: null-ptr-deref in sysfs_do_create_link_sd+0x40/0xd0 Read of size 8 at addr 0000000000000030 by task gssproxy/457

CPU: 5 PID: 457 Comm: gssproxy Not tainted 6.0.0-09040-g02357b27ee03 #9 Call Trace: <TASK> dump_stack_lvl+0x34/0x44 kasan_report+0xa3/0x120 sysfs_do_create_link_sd+0x40/0xd0 rpc_sysfs_client_setup+0x161/0x1b0 rpc_new_client+0x3fc/0x6e0 rpc_create_xprt+0x71/0x220 rpc_create+0x1d4/0x350 gssp_rpc_create+0xc3/0x160 set_gssp_clnt+0xbc/0x140 write_gssp+0x116/0x1a0 proc_reg_write+0xd6/0x130 vfs_write+0x177/0x690 ksys_write+0xb9/0x150 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x46/0xb0

When the xprt_switch sysfs alloc failed, should not add xprt and switch sysfs to it, otherwise, maybe null-ptr-deref; also initialize the 'xps_sysfs' to NULL to avoid oops when destroy it.

Scores

CVSSScoreVectorSource
3.17.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HLinux
3.15.5 MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HCISA-ADP

Weaknesses

Affected Products

ProductVersions
LinuxLinux
  • baea99445dd4675a834e8a5987d2f368adb62e6c to before d59722d088a9d86ce6d9d39979e5d1d669d249f7Affected
  • baea99445dd4675a834e8a5987d2f368adb62e6c to before 7b189b0aa8dab14b49c31c65af8a982e96e25b62Affected
  • baea99445dd4675a834e8a5987d2f368adb62e6c to before cbdeaee94a415800c65a8c3fa04d9664a8b8fb3aAffected
LinuxLinux
  • 5.14Affected
  • before 5.14Not affected
  • 5.15.78 through 5.15.*Not affected
  • 6.0.8 through 6.0.*Not affected
  • 6.1 and laterNot affected

References

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