CVE-2022-50854
In the Linux kernel, the following vulnerability has been resolved: nfc: virtual_ncidev: Fix memory leak in virtual_nci_send() skb should be free in virtual_nci_send(), otherwise kmemleak will report memleak. Steps for reproduction (simulated in qemu): cd tools/testing/selftests/nci make ./nci_dev BUG: memory leak unreferenced object 0xffff888107588000 (size 208): comm "nci_dev", pid 206, jiffies 4294945376 (age 368.248s) hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<000000008d94c8fd>] __alloc_skb+0x1da/0x290 [<00000000278bc7f8>] nci_send_cmd+0xa3/0x350 [<0000000081256a22>] nci_reset_req+0x6b/0xa0 [<000000009e721112>] __nci_request+0x90/0x250 [<000000005d556e59>] nci_dev_up+0x217/0x5b0 [<00000000e618ce62>] nfc_dev_up+0x114/0x220 [<00000000981e226b>] nfc_genl_dev_up+0x94/0xe0 [<000000009bb03517>] genl_family_rcv_msg_doit.isra.14+0x228/0x2d0 [<00000000b7f8c101>] genl_rcv_msg+0x35c/0x640 [<00000000c94075ff>] netlink_rcv_skb+0x11e/0x350 [<00000000440cfb1e>] genl_rcv+0x24/0x40 [<0000000062593b40>] netlink_unicast+0x43f/0x640 [<000000001d0b13cc>] netlink_sendmsg+0x73a/0xbf0 [<000000003272487f>] __sys_sendto+0x324/0x370 [<00000000ef9f1747>] __x64_sys_sendto+0xdd/0x1b0 [<000000001e437841>] do_syscall_64+0x3f/0x90
Affected versions
Linux kernel versions
5.12
and later are affected. Fixed in
5.15.77,
6.0.7,
6.1
and their respective stable series.
References
The following references provide additional information about CVE-2022-50854 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/2c46a9a5f0b1c7341aa67667801079f3ff571678
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PatchKernel patch commithttps://git.kernel.org/stable/c/88e879c9f59511174ef0ab1a3c9c83e2dbf8a213
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PatchKernel patch commithttps://git.kernel.org/stable/c/e840d8f4a1b323973052a1af5ad4edafcde8ae3d
Frequently asked questions
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What is CVE-2022-50854?
CVE-2022-50854 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.12 onward and has been patched in 5.15.77, 6.0.7 and 6.1. CVE-2022-50854 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2022-50854?
Yes — CVE-2022-50854 has been patched. Fixed versions include 5.15.77, 6.0.7 and 6.1. If you are running Linux kernel 5.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2022-50854 actively exploited?
No — CVE-2022-50854 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.