{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2022-50819", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-12-30T12:06:07.131Z", "datePublished": "2025-12-30T12:08:34.225Z", "dateUpdated": "2025-12-30T12:08:34.225Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2025-12-30T12:08:34.225Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nudmabuf: Set ubuf->sg = NULL if the creation of sg table fails\n\nWhen userspace tries to map the dmabuf and if for some reason\n(e.g. OOM) the creation of the sg table fails, ubuf->sg needs to be\nset to NULL. Otherwise, when the userspace subsequently closes the\ndmabuf fd, we'd try to erroneously free the invalid sg table from\nrelease_udmabuf resulting in the following crash reported by syzbot:\n\ngeneral protection fault, probably for non-canonical address\n0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nCPU: 0 PID: 3609 Comm: syz-executor487 Not tainted\n5.19.0-syzkaller-13930-g7ebfc85e2cd7 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS\nGoogle 07/22/2022\nRIP: 0010:dma_unmap_sgtable include/linux/dma-mapping.h:378 [inline]\nRIP: 0010:put_sg_table drivers/dma-buf/udmabuf.c:89 [inline]\nRIP: 0010:release_udmabuf+0xcb/0x4f0 drivers/dma-buf/udmabuf.c:114\nCode: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 2b 04 00 00 48 8d 7d 0c 4c\n8b 63 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14\n02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 e2\nRSP: 0018:ffffc900037efd30 EFLAGS: 00010246\nRAX: dffffc0000000000 RBX: ffffffff8cb67800 RCX: 0000000000000000\nRDX: 0000000000000000 RSI: ffffffff84ad27e0 RDI: 0000000000000000\nRBP: fffffffffffffff4 R08: 0000000000000005 R09: 0000000000000000\nR10: 0000000000000000 R11: 000000000008c07c R12: ffff88801fa05000\nR13: ffff888073db07e8 R14: ffff888025c25440 R15: 0000000000000000\nFS: 0000555555fc4300(0000) GS:ffff8880b9a00000(0000)\nknlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007fc1c0ce06e4 CR3: 00000000715e6000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n dma_buf_release+0x157/0x2d0 drivers/dma-buf/dma-buf.c:78\n __dentry_kill+0x42b/0x640 fs/dcache.c:612\n dentry_kill fs/dcache.c:733 [inline]\n dput+0x806/0xdb0 fs/dcache.c:913\n __fput+0x39c/0x9d0 fs/file_table.c:333\n task_work_run+0xdd/0x1a0 kernel/task_work.c:177\n ptrace_notify+0x114/0x140 kernel/signal.c:2353\n ptrace_report_syscall include/linux/ptrace.h:420 [inline]\n ptrace_report_syscall_exit include/linux/ptrace.h:482 [inline]\n syscall_exit_work kernel/entry/common.c:249 [inline]\n syscall_exit_to_user_mode_prepare+0x129/0x280 kernel/entry/common.c:276\n __syscall_exit_to_user_mode_work kernel/entry/common.c:281 [inline]\n syscall_exit_to_user_mode+0x9/0x50 kernel/entry/common.c:294\n do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\nRIP: 0033:0x7fc1c0c35b6b\nCode: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24\n0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00\nf0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44\nRSP: 002b:00007ffd78a06090 EFLAGS: 00000293 ORIG_RAX: 0000000000000003\nRAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007fc1c0c35b6b\nRDX: 0000000020000280 RSI: 0000000040086200 RDI: 0000000000000006\nRBP: 0000000000000007 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000293 R12: 000000000000000c\nR13: 0000000000000003 R14: 00007fc1c0cfe4a0 R15: 00007ffd78a06140\n </TASK>\nModules linked in:\n---[ end trace 0000000000000000 ]---\nRIP: 0010:dma_unmap_sgtable include/linux/dma-mapping.h:378 [inline]\nRIP: 0010:put_sg_table drivers/dma-buf/udmabuf.c:89 [inline]\nRIP: 0010:release_udmabuf+0xcb/0x4f0 drivers/dma-buf/udmabuf.c:114"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/dma-buf/udmabuf.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "bbe2f6f90310b3a0b5de4e0dc022b36faabfd718", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "dfbed8c92eb853929f4fa676ba493391dab47be4", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "fc285549f454c0f50f87ec945fc0bf44719c0fa4", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "9861e43f097a50678041f973347b3a88f2da09cf", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "d9c04a1b7a15b5e74b2977461d9511e497f05d8f", "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/dma-buf/udmabuf.c"], "versions": [{"version": "5.10.150", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.75", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.19.17", "lessThanOrEqual": "5.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.0.3", "lessThanOrEqual": "6.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1", "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:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.10.150"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.15.75"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "5.19.17"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.0.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/bbe2f6f90310b3a0b5de4e0dc022b36faabfd718"}, {"url": "https://git.kernel.org/stable/c/dfbed8c92eb853929f4fa676ba493391dab47be4"}, {"url": "https://git.kernel.org/stable/c/fc285549f454c0f50f87ec945fc0bf44719c0fa4"}, {"url": "https://git.kernel.org/stable/c/9861e43f097a50678041f973347b3a88f2da09cf"}, {"url": "https://git.kernel.org/stable/c/d9c04a1b7a15b5e74b2977461d9511e497f05d8f"}], "title": "udmabuf: Set ubuf->sg = NULL if the creation of sg table fails", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nudmabuf: Set ubuf->sg = NULL if the creation of sg table fails\n\nWhen userspace tries to map the dmabuf and if for some reason\n(e.g. OOM) the creation of the sg table fails, ubuf->sg needs to be\nset to NULL. Otherwise, when the userspace subsequently closes the\ndmabuf fd, we'd try to erroneously free the invalid sg table from\nrelease_udmabuf resulting in the following crash reported by syzbot:\n\ngeneral protection fault, probably for non-canonical address\n0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nCPU: 0 PID: 3609 Comm: syz-executor487 Not tainted\n5.19.0-syzkaller-13930-g7ebfc85e2cd7 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS\nGoogle 07/22/2022\nRIP: 0010:dma_unmap_sgtable include/linux/dma-mapping.h:378 [inline]\nRIP: 0010:put_sg_table drivers/dma-buf/udmabuf.c:89 [inline]\nRIP: 0010:release_udmabuf+0xcb/0x4f0 drivers/dma-buf/udmabuf.c:114\nCode: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 2b 04 00 00 48 8d 7d 0c 4c\n8b 63 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14\n02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 e2\nRSP: 0018:ffffc900037efd30 EFLAGS: 00010246\nRAX: dffffc0000000000 RBX: ffffffff8cb67800 RCX: 0000000000000000\nRDX: 0000000000000000 RSI: ffffffff84ad27e0 RDI: 0000000000000000\nRBP: fffffffffffffff4 R08: 0000000000000005 R09: 0000000000000000\nR10: 0000000000000000 R11: 000000000008c07c R12: ffff88801fa05000\nR13: ffff888073db07e8 R14: ffff888025c25440 R15: 0000000000000000\nFS: 0000555555fc4300(0000) GS:ffff8880b9a00000(0000)\nknlGS:0000000000000000\nCS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007fc1c0ce06e4 CR3: 00000000715e6000 CR4: 00000000003506f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n <TASK>\n dma_buf_release+0x157/0x2d0 drivers/dma-buf/dma-buf.c:78\n __dentry_kill+0x42b/0x640 fs/dcache.c:612\n dentry_kill fs/dcache.c:733 [inline]\n dput+0x806/0xdb0 fs/dcache.c:913\n __fput+0x39c/0x9d0 fs/file_table.c:333\n task_work_run+0xdd/0x1a0 kernel/task_work.c:177\n ptrace_notify+0x114/0x140 kernel/signal.c:2353\n ptrace_report_syscall include/linux/ptrace.h:420 [inline]\n ptrace_report_syscall_exit include/linux/ptrace.h:482 [inline]\n syscall_exit_work kernel/entry/common.c:249 [inline]\n syscall_exit_to_user_mode_prepare+0x129/0x280 kernel/entry/common.c:276\n __syscall_exit_to_user_mode_work kernel/entry/common.c:281 [inline]\n syscall_exit_to_user_mode+0x9/0x50 kernel/entry/common.c:294\n do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\nRIP: 0033:0x7fc1c0c35b6b\nCode: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24\n0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00\nf0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44\nRSP: 002b:00007ffd78a06090 EFLAGS: 00000293 ORIG_RAX: 0000000000000003\nRAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007fc1c0c35b6b\nRDX: 0000000020000280 RSI: 0000000040086200 RDI: 0000000000000006\nRBP: 0000000000000007 R08: 0000000000000000 R09: 0000000000000000\nR10: 0000000000000000 R11: 0000000000000293 R12: 000000000000000c\nR13: 0000000000000003 R14: 00007fc1c0cfe4a0 R15: 00007ffd78a06140\n </TASK>\nModules linked in:\n---[ end trace 0000000000000000 ]---\nRIP: 0010:dma_unmap_sgtable include/linux/dma-mapping.h:378 [inline]\nRIP: 0010:put_sg_table drivers/dma-buf/udmabuf.c:89 [inline]\nRIP: 0010:release_udmabuf+0xcb/0x4f0 drivers/dma-buf/udmabuf.c:114"}], "id": "CVE-2022-50819", "lastModified": "2025-12-30T13:15:56.307", "metrics": {}, "published": "2025-12-30T13:15:56.307", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9861e43f097a50678041f973347b3a88f2da09cf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/bbe2f6f90310b3a0b5de4e0dc022b36faabfd718"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d9c04a1b7a15b5e74b2977461d9511e497f05d8f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dfbed8c92eb853929f4fa676ba493391dab47be4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fc285549f454c0f50f87ec945fc0bf44719c0fa4"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{}