{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2022-50819", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-50819", "idYear": 2022, "status": "PUBLISHED", "publishedAt": "2025-12-30T12:08:34.225Z", "updatedAt": "2026-05-11T19:25:43.872Z", "importedAt": "2026-10-24T01:56:49.724Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "udmabuf: Set ubuf->sg = NULL if the creation of sg table fails", "summary": "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 \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 \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": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "284562e1f34874e267d4f499362c3816f8f6bc3f", "status": "affected", "versionType": "git", "lessThan": "bbe2f6f90310b3a0b5de4e0dc022b36faabfd718" }, { "version": "284562e1f34874e267d4f499362c3816f8f6bc3f", "status": "affected", "versionType": "git", "lessThan": "dfbed8c92eb853929f4fa676ba493391dab47be4" }, { "version": "284562e1f34874e267d4f499362c3816f8f6bc3f", "status": "affected", "versionType": "git", "lessThan": "fc285549f454c0f50f87ec945fc0bf44719c0fa4" }, { "version": "284562e1f34874e267d4f499362c3816f8f6bc3f", "status": "affected", "versionType": "git", "lessThan": "9861e43f097a50678041f973347b3a88f2da09cf" }, { "version": "284562e1f34874e267d4f499362c3816f8f6bc3f", "status": "affected", "versionType": "git", "lessThan": "d9c04a1b7a15b5e74b2977461d9511e497f05d8f" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.6", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.6" }, { "version": "5.10.150", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.10.*" }, { "version": "5.15.75", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.15.*" }, { "version": "5.19.17", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "5.19.*" }, { "version": "6.0.3", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.0.*" }, { "version": "6.1", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }