{"id":"DEBIAN-CVE-2022-50851","details":"In the Linux kernel, the following vulnerability has been resolved:  vhost_vdpa: fix the crash in unmap a large memory  While testing in vIOMMU, sometimes Guest will unmap very large memory, which will cause the crash. To fix this, add a new function vhost_vdpa_general_unmap(). This function will only unmap the memory that saved in iotlb.  Call Trace: [  647.820144] ------------[ cut here ]------------ [  647.820848] kernel BUG at drivers/iommu/intel/iommu.c:1174! [  647.821486] invalid opcode: 0000 [#1] PREEMPT SMP PTI [  647.822082] CPU: 10 PID: 1181 Comm: qemu-system-x86 Not tainted 6.0.0-rc1home_lulu_2452_lulu7_vhost+ #62 [  647.823139] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.15.0-29-g6a62e0cb0dfe-prebuilt.qem4 [  647.824365] RIP: 0010:domain_unmap+0x48/0x110 [  647.825424] Code: 48 89 fb 8d 4c f6 1e 39 c1 0f 4f c8 83 e9 0c 83 f9 3f 7f 18 48 89 e8 48 d3 e8 48 85 c0 75 59 [  647.828064] RSP: 0018:ffffae5340c0bbf0 EFLAGS: 00010202 [  647.828973] RAX: 0000000000000001 RBX: ffff921793d10540 RCX: 000000000000001b [  647.830083] RDX: 00000000080000ff RSI: 0000000000000001 RDI: ffff921793d10540 [  647.831214] RBP: 0000000007fc0100 R08: ffffae5340c0bcd0 R09: 0000000000000003 [  647.832388] R10: 0000007fc0100000 R11: 0000000000100000 R12: 00000000080000ff [  647.833668] R13: ffffae5340c0bcd0 R14: ffff921793d10590 R15: 0000008000100000 [  647.834782] FS:  00007f772ec90640(0000) GS:ffff921ce7a80000(0000) knlGS:0000000000000000 [  647.836004] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [  647.836990] CR2: 00007f02c27a3a20 CR3: 0000000101b0c006 CR4: 0000000000372ee0 [  647.838107] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [  647.839283] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [  647.840666] Call Trace: [  647.841437]  \u003cTASK\u003e [  647.842107]  intel_iommu_unmap_pages+0x93/0x140 [  647.843112]  __iommu_unmap+0x91/0x1b0 [  647.844003]  iommu_unmap+0x6a/0x95 [  647.844885]  vhost_vdpa_unmap+0x1de/0x1f0 [vhost_vdpa] [  647.845985]  vhost_vdpa_process_iotlb_msg+0xf0/0x90b [vhost_vdpa] [  647.847235]  ? _raw_spin_unlock+0x15/0x30 [  647.848181]  ? _copy_from_iter+0x8c/0x580 [  647.849137]  vhost_chr_write_iter+0xb3/0x430 [vhost] [  647.850126]  vfs_write+0x1e4/0x3a0 [  647.850897]  ksys_write+0x53/0xd0 [  647.851688]  do_syscall_64+0x3a/0x90 [  647.852508]  entry_SYSCALL_64_after_hwframe+0x63/0xcd [  647.853457] RIP: 0033:0x7f7734ef9f4f [  647.854408] Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 29 76 f8 ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c8 [  647.857217] RSP: 002b:00007f772ec8f040 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 [  647.858486] RAX: ffffffffffffffda RBX: 00000000fef00000 RCX: 00007f7734ef9f4f [  647.859713] RDX: 0000000000000048 RSI: 00007f772ec8f090 RDI: 0000000000000010 [  647.860942] RBP: 00007f772ec8f1a0 R08: 0000000000000000 R09: 0000000000000000 [  647.862206] R10: 0000000000000001 R11: 0000000000000293 R12: 0000000000000010 [  647.863446] R13: 0000000000000002 R14: 0000000000000000 R15: ffffffff01100000 [  647.864692]  \u003c/TASK\u003e [  647.865458] Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs v] [  647.874688] ---[ end trace 0000000000000000 ]---","modified":"2026-09-01T16:05:36.636999273Z","published":"2025-12-30T13:15:59.797Z","upstream":["CVE-2022-50851"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-50851"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50851.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50851.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-50851.json"}}],"schema_version":"1.9.0"}