CVE-2022-50819

UNRATEDCVSS · not yet scoredTrending — 4 sources updated this week

Also known asEUVD-2022-55879 (ENISA EUVD) · GHSA-9gc9-2wr3-7fvp (GitHub Security Advisories)Source: ENISA EUVD

—
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS v2: —Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

udmabuf: Set ubuf->sg = NULL if the creation of sg table fails

When userspace tries to map the dmabuf and if for some reason (e.g. OOM) the creation of the sg table fails, ubuf->sg needs to be set to NULL. Otherwise, when the userspace subsequently closes the dmabuf fd, we'd try to erroneously free the invalid sg table from release_udmabuf resulting in the following crash reported by syzbot:

general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 PID: 3609 Comm: syz-executor487 Not tainted 5.19.0-syzkaller-13930-g7ebfc85e2cd7 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 RIP: 0010:dma_unmap_sgtable include/linux/dma-mapping.h:378 [inline] RIP: 0010:put_sg_table drivers/dma-buf/udmabuf.c:89 [inline] RIP: 0010:release_udmabuf+0xcb/0x4f0 drivers/dma-buf/udmabuf.c:114 Code: 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 2b 04 00 00 48 8d 7d 0c 4c 8b 63 30 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <0f> b6 14 02 48 89 f8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 e2 RSP: 0018:ffffc900037efd30 EFLAGS: 00010246 RAX: dffffc0000000000 RBX: ffffffff8cb67800 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff84ad27e0 RDI: 0000000000000000 RBP: fffffffffffffff4 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000000000000 R11: 000000000008c07c R12: ffff88801fa05000 R13: ffff888073db07e8 R14: ffff888025c25440 R15: 0000000000000000 FS: 0000555555fc4300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fc1c0ce06e4 CR3: 00000000715e6000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: dma_buf_release+0x157/0x2d0 drivers/dma-buf/dma-buf.c:78 __dentry_kill+0x42b/0x640 fs/dcache.c:612 dentry_kill fs/dcache.c:733 [inline] dput+0x806/0xdb0 fs/dcache.c:913 __fput+0x39c/0x9d0 fs/file_table.c:333 task_work_run+0xdd/0x1a0 kernel/task_work.c:177 ptrace_notify+0x114/0x140 kernel/signal.c:2353 ptrace_report_syscall include/linux/ptrace.h:420 [inline] ptrace_report_syscall_exit include/linux/ptrace.h:482 [inline] syscall_exit_work kernel/entry/common.c:249 [inline] syscall_exit_to_user_mode_prepare+0x129/0x280 kernel/entry/common.c:276 __syscall_exit_to_user_mode_work kernel/entry/common.c:281 [inline] syscall_exit_to_user_mode+0x9/0x50 kernel/entry/common.c:294 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fc1c0c35b6b Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44 RSP: 002b:00007ffd78a06090 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000007 RCX: 00007fc1c0c35b6b RDX: 0000000020000280 RSI: 0000000040086200 RDI: 0000000000000006 RBP: 0000000000000007 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000000c R13: 0000000000000003 R14: 00007fc1c0cfe4a0 R15: 00007ffd78a06140 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:dma_unmap_sgtable include/linux/dma-mapping.h:378 [inline] RIP: 0010:put_sg_table drivers/dma-buf/udmabuf.c:89 [inline] RIP: 0010:release_udmabuf+0xcb/0x4f0 drivers/dma-buf/udmabuf.c:114

CVSS v3
—
EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
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EG Risk
—
EPSS PROB
0.2%
EPSS %ILE
14th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

EG Severity
Not assessed: no CVSS publishedA missing CVSS is not a severity of zero.
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-26). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
No SSVC decision: EchelonGraph has not assessed this CVECISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the BOD 26-04 block below.

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

December 30, 2025

Last Modified

April 15, 2026

References (5)

Vendor Advisories for CVE-2022-50819(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatkernel-0:4.18.0-513.5.1.el8_92023-11-14redhat
redhatkernel-0:5.14.0-362.8.1.el9_32023-11-07redhat
linuxKernel @ 5.10.150 (fixes >=5.6.0)—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
linux5.10.103-1 ... 5.10.92-2 (22 versions)
  • every version up to 5.10.158-1: fixed in 5.10.158-1
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Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.0.3-1: fixed in 6.0.3-1
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Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.0.3-1: fixed in 6.0.3-1
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Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.0.3-1: fixed in 6.0.3-1
—

Data Freshness Timeline

(refreshed 10× in last 7d / 37× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 98 of 234 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 2 repeat rows among the latest 100 are merged into the row they repeat. The 136 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:30 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  2. 2026-10-31 16:29 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  3. 2026-10-30 16:31 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  4. 2026-10-29 16:30 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  5. 2026-10-28 16:28 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  6. 2026-10-27 16:28 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  7. 2026-10-27 10:46 UTCEG score recompute
  8. 2026-10-27 10:46 UTCVendor advisory
  9. 2026-10-27 10:46 UTCGHSA enrichmentGHSA-9gc9-2wr3-7fvp
  10. 2026-10-26 16:28 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  11. 2026-10-25 22:25 UTCOSV refresh
  12. 2026-10-25 17:53 UTCEG score recompute
  13. 2026-10-25 16:29 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  14. 2026-10-24 16:29 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  15. 2026-10-23 16:29 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  16. 2026-10-22 16:30 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  17. 2026-10-21 16:29 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  18. 2026-10-20 16:29 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  19. 2026-10-19 16:28 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  20. 2026-10-18 16:29 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  21. 2026-10-18 08:18 UTCEG score recompute
  22. 2026-10-17 16:29 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  23. 2026-10-16 16:35 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  24. 2026-10-15 16:28 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  25. 2026-10-14 16:29 UTCEPSS rescoreEPSS 0.2% · 13th percentile
Show 73 more
  1. 2026-10-13 16:29 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  2. 2026-10-12 18:40 UTCEG score recompute
  3. 2026-10-12 16:30 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  4. 2026-10-11 22:04 UTCEG score recompute
  5. 2026-10-11 13:45 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  6. 2026-10-10 19:57 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  7. 2026-10-09 20:05 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  8. 2026-10-08 17:05 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  9. 2026-10-07 23:45 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  10. 2026-10-06 15:14 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  11. 2026-10-05 17:40 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  12. 2026-10-04 23:19 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  13. 2026-10-03 14:23 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  14. 2026-10-03 09:09 UTCOSV refresh
  15. 2026-09-30 16:13 UTCEG score recompute
  16. 2026-09-30 15:01 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  17. 2026-09-27 13:42 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  18. 2026-09-26 15:55 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  19. 2026-09-26 00:22 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  20. 2026-09-24 14:00 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  21. 2026-09-23 13:45 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  22. 2026-09-20 20:13 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  23. 2026-09-16 14:05 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  24. 2026-09-16 05:11 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  25. 2026-09-15 03:07 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  26. 2026-09-14 04:20 UTCOSV refresh
  27. 2026-09-13 16:44 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  28. 2026-09-11 14:50 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  29. 2026-09-11 09:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  30. 2026-09-08 21:57 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  31. 2026-09-07 15:59 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  32. 2026-09-06 13:45 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  33. 2026-09-05 15:25 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  34. 2026-09-04 13:57 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  35. 2026-09-04 05:04 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  36. 2026-09-02 14:09 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  37. 2026-09-01 13:51 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  38. 2026-08-30 19:15 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  39. 2026-08-30 01:19 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  40. 2026-08-28 21:38 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  41. 2026-08-27 14:22 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  42. 2026-08-26 14:43 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  43. 2026-08-26 05:41 UTCOSV refresh
  44. 2026-08-25 13:46 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  45. 2026-08-23 00:17 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  46. 2026-08-21 23:46 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  47. 2026-08-20 22:53 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  48. 2026-08-19 17:01 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  49. 2026-08-18 13:45 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  50. 2026-08-17 13:44 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  51. 2026-08-16 14:53 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  52. 2026-08-16 02:12 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  53. 2026-08-15 01:27 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  54. 2026-08-13 21:58 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  55. 2026-08-12 13:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  56. 2026-08-09 22:26 UTCVendor advisory
  57. 2026-08-09 22:26 UTCGHSA enrichmentGHSA-9gc9-2wr3-7fvp
  58. 2026-08-09 13:44 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  59. 2026-08-08 16:34 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  60. 2026-08-07 16:24 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  61. 2026-08-06 13:44 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  62. 2026-08-06 06:49 UTCEG score recompute
  63. 2026-08-06 06:49 UTCVendor advisory
  64. 2026-08-06 06:49 UTCGHSA enrichmentGHSA-9gc9-2wr3-7fvp
  65. 2026-08-05 19:15 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  66. 2026-08-04 15:07 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  67. 2026-08-04 10:35 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  68. 2026-08-03 10:33 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  69. 2026-08-02 02:24 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  70. 2026-08-01 04:13 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  71. 2026-07-30 16:25 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  72. 2026-07-30 01:28 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  73. 2026-07-28 15:34 UTCEPSS rescoreEPSS 0.2% · 10th percentile

Related CVEs(same vendor)

Frequently asked(4)

What is CVE-2022-50819?
CVE-2022-50819 is a vulnerability whose severity is not yet rated; its CVE record was published on December 30, 2025. In the Linux kernel, the following vulnerability has been resolved: udmabuf: Set ubuf->sg = NULL if the creation of sg table fails When userspace tries to map the dmabuf and if for some reason (e.g. OOM) the creation of the sg table fails, ubuf->sg needs to be set to NULL. Otherwise, when the…
When was the CVE record for CVE-2022-50819 published?
The CVE record for CVE-2022-50819 was published on December 30, 2025. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of April 15, 2026; the record at its source may have been updated since.
Is CVE-2022-50819 actively exploited?
CVE-2022-50819 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (14th percentile of EPSS-scored CVEs).
How do I remediate CVE-2022-50819?
A fix for CVE-2022-50819 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2022-50819 are linked in the Vendor Advisories panel on this page.

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