vdpa_sim: fix possible memory leak in vdpasim_net_init() and vdpasim_blk_init()

Description

In the Linux kernel, the following vulnerability has been resolved: vdpa_sim: fix possible memory leak in vdpasim_net_init() and vdpasim_blk_init() Inject fault while probing module, if device_register() fails in vdpasim_net_init() or vdpasim_blk_init(), but the refcount of kobject is not decreased to 0, the name allocated in dev_set_name() is leaked. Fix this by calling put_device(), so that name can be freed in callback function kobject_cleanup(). (vdpa_sim_net) unreferenced object 0xffff88807eebc370 (size 16): comm "modprobe", pid 3848, jiffies 4362982860 (age 18.153s) hex dump (first 16 bytes): 76 64 70 61 73 69 6d 5f 6e 65 74 00 6b 6b 6b a5 vdpasim_net.kkk. backtrace: [<ffffffff8174f19e>] __kmalloc_node_track_caller+0x4e/0x150 [<ffffffff81731d53>] kstrdup+0x33/0x60 [<ffffffff83a5d421>] kobject_set_name_vargs+0x41/0x110 [<ffffffff82d87aab>] dev_set_name+0xab/0xe0 [<ffffffff82d91a23>] device_add+0xe3/0x1a80 [<ffffffffa0270013>] 0xffffffffa0270013 [<ffffffff81001c27>] do_one_initcall+0x87/0x2e0 [<ffffffff813739cb>] do_init_module+0x1ab/0x640 [<ffffffff81379d20>] load_module+0x5d00/0x77f0 [<ffffffff8137bc40>] __do_sys_finit_module+0x110/0x1b0 [<ffffffff83c4d505>] do_syscall_64+0x35/0x80 [<ffffffff83e0006a>] entry_SYSCALL_64_after_hwframe+0x46/0xb0 (vdpa_sim_blk) unreferenced object 0xffff8881070c1250 (size 16): comm "modprobe", pid 6844, jiffies 4364069319 (age 17.572s) hex dump (first 16 bytes): 76 64 70 61 73 69 6d 5f 62 6c 6b 00 6b 6b 6b a5 vdpasim_blk.kkk. backtrace: [<ffffffff8174f19e>] __kmalloc_node_track_caller+0x4e/0x150 [<ffffffff81731d53>] kstrdup+0x33/0x60 [<ffffffff83a5d421>] kobject_set_name_vargs+0x41/0x110 [<ffffffff82d87aab>] dev_set_name+0xab/0xe0 [<ffffffff82d91a23>] device_add+0xe3/0x1a80 [<ffffffffa0220013>] 0xffffffffa0220013 [<ffffffff81001c27>] do_one_initcall+0x87/0x2e0 [<ffffffff813739cb>] do_init_module+0x1ab/0x640 [<ffffffff81379d20>] load_module+0x5d00/0x77f0 [<ffffffff8137bc40>] __do_sys_finit_module+0x110/0x1b0 [<ffffffff83c4d505>] do_syscall_64+0x35/0x80 [<ffffffff83e0006a>] entry_SYSCALL_64_after_hwframe+0x46/0xb0

Scores

No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Deferred.

EPSS (exploitation in 30 days)

0.20% · top 90% of all CVEs (6 Nov 2026)

The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.

Affected products

• Linux · Linux

  • affected a3c06ae158dd6fa8336157c31d9234689d068d02 – < 586e6fd7d581f987f7d0d2592edf0b26397e783e
  • affected a3c06ae158dd6fa8336157c31d9234689d068d02 – < 5be953e353fe421f2983e1fd37f07fba97edbffc
  • affected a3c06ae158dd6fa8336157c31d9234689d068d02 – < 337c24d817e28dd454ca22f1063dfad20822426e
  • affected a3c06ae158dd6fa8336157c31d9234689d068d02 – < aeca7ff254843d49a8739f07f7dab1341450111d

• Linux · Linux

  • affected 5.12
  • unaffected < 5.12
  • unaffected 5.15.87 – ≤ 5.15.*
  • unaffected 6.0.19 – ≤ 6.0.*
  • unaffected 6.1.5 – ≤ 6.1.*
  • unaffected 6.2 – ≤ *

References (4)

• https://git.kernel.org/stable/c/586e6fd7d581f987f7d0d2592edf0b26397e783e (opens in a new tab)
• https://git.kernel.org/stable/c/5be953e353fe421f2983e1fd37f07fba97edbffc (opens in a new tab)
• https://git.kernel.org/stable/c/337c24d817e28dd454ca22f1063dfad20822426e (opens in a new tab)
• https://git.kernel.org/stable/c/aeca7ff254843d49a8739f07f7dab1341450111d (opens in a new tab)

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2022-50702](https://trackcve.app/badge/CVE-2022-50702.svg)](https://trackcve.app/cve/CVE-2022-50702)

Record last updated 11 May 2026, 19:23 UTC.