{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2022-50851", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-30T12:06:07.134Z", "datePublished": "2025-12-30T12:15:27.765Z", "dateUpdated": "2026-05-11T19:26:20.767Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T19:26:20.767Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvhost_vdpa: fix the crash in unmap a large memory\n\nWhile testing in vIOMMU, sometimes Guest will unmap very large memory,\nwhich will cause the crash. To fix this, add a new function\nvhost_vdpa_general_unmap(). This function will only unmap the memory\nthat saved in iotlb.\n\nCall Trace:\n[ 647.820144] ------------[ cut here ]------------\n[ 647.820848] kernel BUG at drivers/iommu/intel/iommu.c:1174!\n[ 647.821486] invalid opcode: 0000 [#1] PREEMPT SMP PTI\n[ 647.822082] CPU: 10 PID: 1181 Comm: qemu-system-x86 Not tainted 6.0.0-rc1home_lulu_2452_lulu7_vhost+ #62\n[ 647.823139] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.15.0-29-g6a62e0cb0dfe-prebuilt.qem4\n[ 647.824365] RIP: 0010:domain_unmap+0x48/0x110\n[ 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\n[ 647.828064] RSP: 0018:ffffae5340c0bbf0 EFLAGS: 00010202\n[ 647.828973] RAX: 0000000000000001 RBX: ffff921793d10540 RCX: 000000000000001b\n[ 647.830083] RDX: 00000000080000ff RSI: 0000000000000001 RDI: ffff921793d10540\n[ 647.831214] RBP: 0000000007fc0100 R08: ffffae5340c0bcd0 R09: 0000000000000003\n[ 647.832388] R10: 0000007fc0100000 R11: 0000000000100000 R12: 00000000080000ff\n[ 647.833668] R13: ffffae5340c0bcd0 R14: ffff921793d10590 R15: 0000008000100000\n[ 647.834782] FS: 00007f772ec90640(0000) GS:ffff921ce7a80000(0000) knlGS:0000000000000000\n[ 647.836004] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 647.836990] CR2: 00007f02c27a3a20 CR3: 0000000101b0c006 CR4: 0000000000372ee0\n[ 647.838107] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[ 647.839283] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[ 647.840666] Call Trace:\n[ 647.841437] \n[ 647.842107] intel_iommu_unmap_pages+0x93/0x140\n[ 647.843112] __iommu_unmap+0x91/0x1b0\n[ 647.844003] iommu_unmap+0x6a/0x95\n[ 647.844885] vhost_vdpa_unmap+0x1de/0x1f0 [vhost_vdpa]\n[ 647.845985] vhost_vdpa_process_iotlb_msg+0xf0/0x90b [vhost_vdpa]\n[ 647.847235] ? _raw_spin_unlock+0x15/0x30\n[ 647.848181] ? _copy_from_iter+0x8c/0x580\n[ 647.849137] vhost_chr_write_iter+0xb3/0x430 [vhost]\n[ 647.850126] vfs_write+0x1e4/0x3a0\n[ 647.850897] ksys_write+0x53/0xd0\n[ 647.851688] do_syscall_64+0x3a/0x90\n[ 647.852508] entry_SYSCALL_64_after_hwframe+0x63/0xcd\n[ 647.853457] RIP: 0033:0x7f7734ef9f4f\n[ 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\n[ 647.857217] RSP: 002b:00007f772ec8f040 EFLAGS: 00000293 ORIG_RAX: 0000000000000001\n[ 647.858486] RAX: ffffffffffffffda RBX: 00000000fef00000 RCX: 00007f7734ef9f4f\n[ 647.859713] RDX: 0000000000000048 RSI: 00007f772ec8f090 RDI: 0000000000000010\n[ 647.860942] RBP: 00007f772ec8f1a0 R08: 0000000000000000 R09: 0000000000000000\n[ 647.862206] R10: 0000000000000001 R11: 0000000000000293 R12: 0000000000000010\n[ 647.863446] R13: 0000000000000002 R14: 0000000000000000 R15: ffffffff01100000\n[ 647.864692] \n[ 647.865458] Modules linked in: rpcsec_gss_krb5 auth_rpcgss nfsv4 dns_resolver nfs lockd grace fscache netfs v]\n[ 647.874688] ---[ end trace 0000000000000000 ]---" } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/vhost/vdpa.c" ], "versions": [ { "version": "4c8cf31885f69e86be0b5b9e6677a26797365e1d", "lessThan": "26b7400c89b81e2f6de4f224ba1fdf06f293de31", "status": "affected", "versionType": "git" }, { "version": "4c8cf31885f69e86be0b5b9e6677a26797365e1d", "lessThan": "8b258a31c2e8d4d4e42be70a7c6ca35a5afbff0d", "status": "affected", "versionType": "git" }, { "version": "4c8cf31885f69e86be0b5b9e6677a26797365e1d", "lessThan": "e794070af224ade46db368271896b2685ff4f96b", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/vhost/vdpa.c" ], "versions": [ { "version": "5.7", "status": "affected" }, { "version": "0", "lessThan": "5.7", "status": "unaffected", "versionType": "semver" }, { "version": "6.0.19", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.5", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.0.19" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.1.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.7", "versionEndExcluding": "6.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/26b7400c89b81e2f6de4f224ba1fdf06f293de31" }, { "url": "https://git.kernel.org/stable/c/8b258a31c2e8d4d4e42be70a7c6ca35a5afbff0d" }, { "url": "https://git.kernel.org/stable/c/e794070af224ade46db368271896b2685ff4f96b" } ], "title": "vhost_vdpa: fix the crash in unmap a large memory", "x_generator": { "engine": "bippy-1.2.0" } } } }