CVE-2022-50638

UNRATEDCVSS · not yet scoredTrending — 4 sources updated this week

Also known asEUVD-2022-55718 (ENISA EUVD) · GHSA-3h3j-qpcw-hrmc (GitHub Security Advisories)Source: ENISA EUVD

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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:

ext4: fix bug_on in __es_tree_search caused by bad boot loader inode

We got a issue as fllows: ================================================================== kernel BUG at fs/ext4/extents_status.c:203! invalid opcode: 0000 [#1] PREEMPT SMP CPU: 1 PID: 945 Comm: cat Not tainted 6.0.0-next-20221007-dirty #349 RIP: 0010:ext4_es_end.isra.0+0x34/0x42 RSP: 0018:ffffc9000143b768 EFLAGS: 00010203 RAX: 0000000000000000 RBX: ffff8881769cd0b8 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff8fc27cf7 RDI: 00000000ffffffff RBP: ffff8881769cd0bc R08: 0000000000000000 R09: ffffc9000143b5f8 R10: 0000000000000001 R11: 0000000000000001 R12: ffff8881769cd0a0 R13: ffff8881768e5668 R14: 00000000768e52f0 R15: 0000000000000000 FS: 00007f359f7f05c0(0000)GS:ffff88842fd00000(0000)knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f359f5a2000 CR3: 000000017130c000 CR4: 00000000000006e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __es_tree_search.isra.0+0x6d/0xf5 ext4_es_cache_extent+0xfa/0x230 ext4_cache_extents+0xd2/0x110 ext4_find_extent+0x5d5/0x8c0 ext4_ext_map_blocks+0x9c/0x1d30 ext4_map_blocks+0x431/0xa50 ext4_mpage_readpages+0x48e/0xe40 ext4_readahead+0x47/0x50 read_pages+0x82/0x530 page_cache_ra_unbounded+0x199/0x2a0 do_page_cache_ra+0x47/0x70 page_cache_ra_order+0x242/0x400 ondemand_readahead+0x1e8/0x4b0 page_cache_sync_ra+0xf4/0x110 filemap_get_pages+0x131/0xb20 filemap_read+0xda/0x4b0 generic_file_read_iter+0x13a/0x250 ext4_file_read_iter+0x59/0x1d0 vfs_read+0x28f/0x460 ksys_read+0x73/0x160 __x64_sys_read+0x1e/0x30 do_syscall_64+0x35/0x80 entry_SYSCALL_64_after_hwframe+0x63/0xcd ==================================================================

In the above issue, ioctl invokes the swap_inode_boot_loader function to swap inode<5> and inode<12>. However, inode<5> contain incorrect imode and disordered extents, and i_nlink is set to 1. The extents check for inode in the ext4_iget function can be bypassed bacause 5 is EXT4_BOOT_LOADER_INO. While links_count is set to 1, the extents are not initialized in swap_inode_boot_loader. After the ioctl command is executed successfully, the extents are swapped to inode<12>, in this case, run the cat command to view inode<12>. And Bug_ON is triggered due to the incorrect extents.

When the boot loader inode is not initialized, its imode can be one of the following: 1) the imode is a bad type, which is marked as bad_inode in ext4_iget and set to S_IFREG. 2) the imode is good type but not S_IFREG. 3) the imode is S_IFREG.

The BUG_ON may be triggered by bypassing the check in cases 1 and 2. Therefore, when the boot loader inode is bad_inode or its imode is not S_IFREG, initialize the inode to avoid triggering the BUG.

CVSS v3
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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
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EPSS PROB
0.2%
EPSS %ILE
15th
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 9, 2025

Last Modified

April 15, 2026

References (9)

Vendor Advisories for CVE-2022-50638(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-0:4.18.0-553.el8_102024-05-22redhat
redhatkernel-0:5.14.0-427.13.1.el9_42024-04-30redhat
linuxKernel @ 4.9.337 (fixes >=3.10.0)—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 (25 versions)
  • every version up to 5.10.178-1: fixed in 5.10.178-1
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Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.1.4-1: fixed in 6.1.4-1
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Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.1.4-1: fixed in 6.1.4-1
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Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.1.4-1: fixed in 6.1.4-1
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Data Freshness Timeline

(refreshed 10× in last 7d / 38× 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 237 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 139 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-02 16:39 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  2. 2026-11-01 16:30 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  3. 2026-10-31 16:29 UTCEPSS rescoreEPSS 0.2% · 15th percentile
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  6. 2026-10-28 16:28 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  7. 2026-10-27 16:28 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  8. 2026-10-27 10:44 UTCEG score recompute
  9. 2026-10-27 10:44 UTCVendor advisory
  10. 2026-10-27 10:44 UTCGHSA enrichmentGHSA-3h3j-qpcw-hrmc
  11. 2026-10-26 16:28 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  12. 2026-10-25 17:53 UTCEG score recompute
  13. 2026-10-25 16:29 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  14. 2026-10-24 22:25 UTCOSV refresh
  15. 2026-10-24 16:29 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  16. 2026-10-23 16:29 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  17. 2026-10-22 16:30 UTCEPSS rescoreEPSS 0.2% · 14th percentile
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  21. 2026-10-18 16:29 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  22. 2026-10-18 08:18 UTCEG score recompute
  23. 2026-10-17 16:29 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  24. 2026-10-16 16:35 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  25. 2026-10-15 16:28 UTCEPSS rescoreEPSS 0.2% · 14th percentile
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  1. 2026-10-14 16:29 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  2. 2026-10-13 16:29 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  3. 2026-10-12 18:40 UTCEG score recompute
  4. 2026-10-12 16:30 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  5. 2026-10-11 22:04 UTCEG score recompute
  6. 2026-10-11 13:45 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  7. 2026-10-10 19:57 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  8. 2026-10-09 20:05 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  9. 2026-10-08 17:05 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  10. 2026-10-07 23:45 UTCEPSS rescoreEPSS 0.2% · 14th percentile
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  13. 2026-10-04 23:19 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  14. 2026-10-03 14:23 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  15. 2026-10-01 04:10 UTCOSV refresh
  16. 2026-09-30 16:13 UTCEG score recompute
  17. 2026-09-30 15:01 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  18. 2026-09-27 13:42 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  19. 2026-09-26 15:55 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  20. 2026-09-26 00:22 UTCEPSS rescoreEPSS 0.2% · 13th percentile
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  22. 2026-09-23 13:45 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  23. 2026-09-20 20:13 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  24. 2026-09-16 14:05 UTCEPSS rescoreEPSS 0.2% · 15th percentile
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  26. 2026-09-15 03:07 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  27. 2026-09-13 16:44 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  28. 2026-09-12 06:40 UTCOSV refresh
  29. 2026-09-11 14:50 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  30. 2026-09-11 09:34 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  31. 2026-09-08 21:57 UTCEPSS rescoreEPSS 0.2% · 15th percentile
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  38. 2026-09-01 13:51 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  39. 2026-08-30 19:15 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  40. 2026-08-30 01:19 UTCEPSS rescoreEPSS 0.2% · 14th percentile
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  45. 2026-08-24 12:00 UTCOSV refresh
  46. 2026-08-23 00:17 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  47. 2026-08-21 23:46 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  48. 2026-08-20 22:53 UTCEPSS rescoreEPSS 0.2% · 15th percentile
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  50. 2026-08-18 13:45 UTCEPSS rescoreEPSS 0.2% · 15th percentile
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  54. 2026-08-15 01:27 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  55. 2026-08-13 21:58 UTCEPSS rescoreEPSS 0.2% · 14th percentile
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  57. 2026-08-09 13:44 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  58. 2026-08-08 16:34 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  59. 2026-08-08 08:07 UTCEG score recompute
  60. 2026-08-08 08:07 UTCVendor advisory
  61. 2026-08-08 08:07 UTCGHSA enrichmentGHSA-3h3j-qpcw-hrmc
  62. 2026-08-07 16:24 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  63. 2026-08-06 13:44 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  64. 2026-08-05 19:15 UTCEPSS rescoreEPSS 0.2% · 12th percentile
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  71. 2026-07-28 15:34 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  72. 2026-07-27 05:39 UTCOSV refresh
  73. 2026-07-26 14:52 UTCEPSS rescoreEPSS 0.2% · 11th percentile

Related CVEs(same vendor)

Frequently asked(4)

What is CVE-2022-50638?
CVE-2022-50638 is a vulnerability whose severity is not yet rated; its CVE record was published on December 9, 2025. In the Linux kernel, the following vulnerability has been resolved: ext4: fix bug_on in __es_tree_search caused by bad boot loader inode We got a issue as fllows: ================================================================== kernel BUG at fs/ext4/extents_status.c:203! invalid opcode: 0000 [#1]…
When was the CVE record for CVE-2022-50638 published?
The CVE record for CVE-2022-50638 was published on December 9, 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-2022-50638 actively exploited?
CVE-2022-50638 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (15th percentile of EPSS-scored CVEs).
How do I remediate CVE-2022-50638?
A fix for CVE-2022-50638 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2022-50638 are linked in the Vendor Advisories panel on this page.

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