CVE-2022-49788
misc/vmw_vmci: fix an infoleak in vmci_host_do_receive_datagram()
In the Linux kernel, the following vulnerability has been resolved: misc/vmw_vmci: fix an infoleak in vmci_host_do_receive_datagram() `struct vmci_event_qp` allocated by qp_notify_peer() contains padding, which may carry uninitialized data to the userspace, as observed by KMSAN: BUG: KMSAN: kernel-infoleak in instrument_copy_to_user ./include/linux/instrumented.h:121 instrument_copy_to_user ./include/linux/instrumented.h:121 _copy_to_user+0x5f/0xb0 lib/usercopy.c:33 copy_to_user ./include/linux/uaccess.h:169 vmci_host_do_receive_datagram drivers/misc/vmw_vmci/vmci_host.c:431 vmci_host_unlocked_ioctl+0x33d/0x43d0 drivers/misc/vmw_vmci/vmci_host.c:925 vfs_ioctl fs/ioctl.c:51 ... Uninit was stored to memory at: kmemdup+0x74/0xb0 mm/util.c:131 dg_dispatch_as_host drivers/misc/vmw_vmci/vmci_datagram.c:271 vmci_datagram_dispatch+0x4f8/0xfc0 drivers/misc/vmw_vmci/vmci_datagram.c:339 qp_notify_peer+0x19a/0x290 drivers/misc/vmw_vmci/vmci_queue_pair.c:1479 qp_broker_attach drivers/misc/vmw_vmci/vmci_queue_pair.c:1662 qp_broker_alloc+0x2977/0x2f30 drivers/misc/vmw_vmci/vmci_queue_pair.c:1750 vmci_qp_broker_alloc+0x96/0xd0 drivers/misc/vmw_vmci/vmci_queue_pair.c:1940 vmci_host_do_alloc_queuepair drivers/misc/vmw_vmci/vmci_host.c:488 vmci_host_unlocked_ioctl+0x24fd/0x43d0 drivers/misc/vmw_vmci/vmci_host.c:927 ... Local variable ev created at: qp_notify_peer+0x54/0x290 drivers/misc/vmw_vmci/vmci_queue_pair.c:1456 qp_broker_attach drivers/misc/vmw_vmci/vmci_queue_pair.c:1662 qp_broker_alloc+0x2977/0x2f30 drivers/misc/vmw_vmci/vmci_queue_pair.c:1750 Bytes 28-31 of 48 are uninitialized Memory access of size 48 starts at ffff888035155e00 Data copied to user address 0000000020000100 Use memset() to prevent the infoleaks. Also speculatively fix qp_notify_peer_local(), which may suffer from the same problem.
Fixes and workarounds
No remediation reported in collected sources.
Missing remediation information is not evidence that no patch exists.
Affected products and versions
| Product | Versions | Authority |
|---|---|---|
| Linux Linux |
≥ 06164d2b72aa752ce4633184b3e0d97601017135; < 7ccf7229b96fadc3a185d1391f814a604c7ef609 (affected, git) ≥ 06164d2b72aa752ce4633184b3e0d97601017135; < f04586c2315cfd03d72ad0395705435e7ed07b1a (affected, git) ≥ 06164d2b72aa752ce4633184b3e0d97601017135; < 5a275528025ae4bc7e2232866856dfebf84b2fad (affected, git) ≥ 06164d2b72aa752ce4633184b3e0d97601017135; < e7061dd1fef2dfb6458cd521aef27aa66f510d31 (affected, git) ≥ 06164d2b72aa752ce4633184b3e0d97601017135; < 62634b43d3c4e1bf62fd540196f7081bf0885c0a (affected, git) ≥ 06164d2b72aa752ce4633184b3e0d97601017135; < 8e2f33c598370bcf828bab4d667d1d38bcd3c57d (affected, git) ≥ 06164d2b72aa752ce4633184b3e0d97601017135; < 76c50d77b928a33e5290aaa9fdc10e88254ff8c7 (affected, git) ≥ 06164d2b72aa752ce4633184b3e0d97601017135; < e5b0d06d9b10f5f43101bd6598b076c347f9295f (affected, git) Other versions: unaffected |
CNA: Linux |
| Linux Linux |
3.9 (affected) ≥ 0; < 3.9 (unaffected, semver) ≥ 4.9.334; ≤ 4.9.* (unaffected, semver) ≥ 4.14.300; ≤ 4.14.* (unaffected, semver) ≥ 4.19.267; ≤ 4.19.* (unaffected, semver) ≥ 5.4.225; ≤ 5.4.* (unaffected, semver) ≥ 5.10.156; ≤ 5.10.* (unaffected, semver) ≥ 5.15.80; ≤ 5.15.* (unaffected, semver) ≥ 6.0.10; ≤ 6.0.* (unaffected, semver) ≥ 6.1; ≤ * (unaffected, original_commit_for_fix) Other versions: affected |
CNA: Linux |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
No CVSS assessment reported. An unscored record is not a low-severity determination.
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://git.kernel.org/stable/c/7ccf7229b96fadc3a185d1391f814a604c7ef609CNA: Linux
- https://git.kernel.org/stable/c/f04586c2315cfd03d72ad0395705435e7ed07b1aCNA: Linux
- https://git.kernel.org/stable/c/5a275528025ae4bc7e2232866856dfebf84b2fadCNA: Linux
- https://git.kernel.org/stable/c/e7061dd1fef2dfb6458cd521aef27aa66f510d31CNA: Linux
- https://git.kernel.org/stable/c/62634b43d3c4e1bf62fd540196f7081bf0885c0aCNA: Linux
- https://git.kernel.org/stable/c/8e2f33c598370bcf828bab4d667d1d38bcd3c57dCNA: Linux
- https://git.kernel.org/stable/c/76c50d77b928a33e5290aaa9fdc10e88254ff8c7CNA: Linux
- https://git.kernel.org/stable/c/e5b0d06d9b10f5f43101bd6598b076c347f9295fCNA: Linux
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