CVE-2024-26746

MEDIUMNVD 5.55.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

Score 5.5 from GitHub Security Advisory published 2024-04-04. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3

Also known asEUVD-2024-24008 (ENISA EUVD) · GHSA-frw5-678v-439g (GitHub Security Advisories)Source: ENISA EUVD

5.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 5.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

dmaengine: idxd: Ensure safe user copy of completion record

If CONFIG_HARDENED_USERCOPY is enabled, copying completion record from event log cache to user triggers a kernel bug.

[ 1987.159822] usercopy: Kernel memory exposure attempt detected from SLUB object 'dsa0' (offset 74, size 31)! [ 1987.170845] ------------[ cut here ]------------ [ 1987.176086] kernel BUG at mm/usercopy.c:102! [ 1987.180946] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI [ 1987.186866] CPU: 17 PID: 528 Comm: kworker/17:1 Not tainted 6.8.0-rc2+ #5 [ 1987.194537] Hardware name: Intel Corporation AvenueCity/AvenueCity, BIOS BHSDCRB1.86B.2492.D03.2307181620 07/18/2023 [ 1987.206405] Workqueue: wq0.0 idxd_evl_fault_work [idxd] [ 1987.212338] RIP: 0010:usercopy_abort+0x72/0x90 [ 1987.217381] Code: 58 65 9c 50 48 c7 c2 17 85 61 9c 57 48 c7 c7 98 fd 6b 9c 48 0f 44 d6 48 c7 c6 b3 08 62 9c 4c 89 d1 49 0f 44 f3 e8 1e 2e d5 ff <0f> 0b 49 c7 c1 9e 42 61 9c 4c 89 cf 4d 89 c8 eb a9 66 66 2e 0f 1f [ 1987.238505] RSP: 0018:ff62f5cf20607d60 EFLAGS: 00010246 [ 1987.244423] RAX: 000000000000005f RBX: 000000000000001f RCX: 0000000000000000 [ 1987.252480] RDX: 0000000000000000 RSI: ffffffff9c61429e RDI: 00000000ffffffff [ 1987.260538] RBP: ff62f5cf20607d78 R08: ff2a6a89ef3fffe8 R09: 00000000fffeffff [ 1987.268595] R10: ff2a6a89eed00000 R11: 0000000000000003 R12: ff2a66934849c89a [ 1987.276652] R13: 0000000000000001 R14: ff2a66934849c8b9 R15: ff2a66934849c899 [ 1987.284710] FS: 0000000000000000(0000) GS:ff2a66b22fe40000(0000) knlGS:0000000000000000 [ 1987.293850] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1987.300355] CR2: 00007fe291a37000 CR3: 000000010fbd4005 CR4: 0000000000f71ef0 [ 1987.308413] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1987.316470] DR3: 0000000000000000 DR6: 00000000fffe07f0 DR7: 0000000000000400 [ 1987.324527] PKRU: 55555554 [ 1987.327622] Call Trace: [ 1987.330424] [ 1987.332826] ? show_regs+0x6e/0x80 [ 1987.336703] ? die+0x3c/0xa0 [ 1987.339988] ? do_trap+0xd4/0xf0 [ 1987.343662] ? do_error_trap+0x75/0xa0 [ 1987.347922] ? usercopy_abort+0x72/0x90 [ 1987.352277] ? exc_invalid_op+0x57/0x80 [ 1987.356634] ? usercopy_abort+0x72/0x90 [ 1987.360988] ? asm_exc_invalid_op+0x1f/0x30 [ 1987.365734] ? usercopy_abort+0x72/0x90 [ 1987.370088] __check_heap_object+0xb7/0xd0 [ 1987.374739] __check_object_size+0x175/0x2d0 [ 1987.379588] idxd_copy_cr+0xa9/0x130 [idxd] [ 1987.384341] idxd_evl_fault_work+0x127/0x390 [idxd] [ 1987.389878] process_one_work+0x13e/0x300 [ 1987.394435] ? __pfx_worker_thread+0x10/0x10 [ 1987.399284] worker_thread+0x2f7/0x420 [ 1987.403544] ? _raw_spin_unlock_irqrestore+0x2b/0x50 [ 1987.409171] ? __pfx_worker_thread+0x10/0x10 [ 1987.414019] kthread+0x107/0x140 [ 1987.417693] ? __pfx_kthread+0x10/0x10 [ 1987.421954] ret_from_fork+0x3d/0x60 [ 1987.426019] ? __pfx_kthread+0x10/0x10 [ 1987.430281] ret_from_fork_asm+0x1b/0x30 [ 1987.434744]

The issue arises because event log cache is created using kmem_cache_create() which is not suitable for user copy.

Fix the issue by creating event log cache with kmem_cache_create_usercopy(), ensuring safe user copy.

CVSS v3
5.5
EG Score
5.5MEDIUMmedium confidence
EG Risk
25
EG Risk 25/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity55% × 45%
Impact severity (EG Severity): CVSS 5.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
13th
KEV
Not listed

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

The EG score (5.5): severity, escalated by confirmed exploitation. This CVE's 5.5 is its impact severity (EG Severity), not escalated.

EG Severity
5.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-25). 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
SSVC Track at medium mission impactTrack at every mission impact level.CISA BOD 26-04: 60 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 SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 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 Vulnrichment) · Technical impact partial (CISA Vulnrichment). 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

April 4, 2024

Last Modified

March 18, 2025

References (3)

Vendor Advisories for CVE-2024-26746(1)

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

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatkernel-0:5.14.0-503.11.1.el9_52024-11-12redhat
linuxKernel @ 6.6.21 (fixes >=6.4.0)—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

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.7.9-1: fixed in 6.7.9-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.7.9-1: fixed in 6.7.9-1
—

Data Freshness Timeline

(refreshed 7× 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 97 of 201 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. 3 repeat rows among the latest 100 are merged into the row they repeat. The 104 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-01 16:31 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  2. 2026-10-31 16:30 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  3. 2026-10-30 16:31 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  4. 2026-10-29 16:30 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  5. 2026-10-28 16:29 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  6. 2026-10-27 16:29 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  7. 2026-10-26 16:29 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  8. 2026-10-25 17:15 UTCEG score recompute
  9. 2026-10-25 16:30 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  10. 2026-10-24 16:30 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  11. 2026-10-24 08:24 UTCEG score recompute
  12. 2026-10-24 08:24 UTCVendor advisory
  13. 2026-10-24 08:24 UTCGHSA enrichmentGHSA-frw5-678v-439g · GitHub CVSS 5.5
  14. 2026-10-23 16:29 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  15. 2026-10-22 16:31 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  16. 2026-10-21 16:29 UTCEPSS rescoreEPSS 0.2% · 12th percentile
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  19. 2026-10-18 16:29 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  20. 2026-10-18 07:22 UTCEG score recompute
  21. 2026-10-17 16:30 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  22. 2026-10-16 16:36 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  23. 2026-10-15 16:29 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  24. 2026-10-14 16:30 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  25. 2026-10-13 16:30 UTCEPSS rescoreEPSS 0.2% · 12th percentile
Show 72 more
  1. 2026-10-12 17:59 UTCEG score recompute
  2. 2026-10-12 16:31 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  3. 2026-10-11 21:23 UTCEG score recompute
  4. 2026-10-11 16:24 UTCOSV refresh
  5. 2026-10-11 16:17 UTCEG score recompute
  6. 2026-10-11 13:45 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  7. 2026-10-10 19:58 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  8. 2026-10-09 20:05 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  9. 2026-10-08 17:07 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  10. 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  11. 2026-10-06 15:15 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  12. 2026-10-05 17:41 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  13. 2026-10-04 23:20 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  14. 2026-10-03 14:23 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  15. 2026-10-01 19:48 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  16. 2026-09-30 16:59 UTCEG score recompute
  17. 2026-09-30 15:01 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  18. 2026-09-29 15:17 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  19. 2026-09-28 13:49 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  20. 2026-09-24 14:01 UTCEPSS rescoreEPSS 0.2% · 11th percentile
  21. 2026-09-16 14:06 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  22. 2026-09-16 05:11 UTCEPSS rescoreEPSS 0.2% · 13th percentile
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  24. 2026-09-13 16:45 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  25. 2026-09-12 14:59 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  26. 2026-09-11 14:51 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  27. 2026-09-08 21:58 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  28. 2026-09-07 15:59 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  29. 2026-09-06 13:46 UTCEPSS rescoreEPSS 0.2% · 13th percentile
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  31. 2026-09-04 13:58 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  32. 2026-09-04 05:05 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  33. 2026-09-03 01:29 UTCOSV refresh
  34. 2026-09-02 14:10 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  35. 2026-09-01 13:52 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  36. 2026-08-30 19:15 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  37. 2026-08-28 21:39 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  38. 2026-08-27 14:23 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  39. 2026-08-26 14:44 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  40. 2026-08-25 13:47 UTCEPSS rescoreEPSS 0.2% · 12th percentile
  41. 2026-08-23 00:17 UTCEPSS rescoreEPSS 0.2% · 13th percentile
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  44. 2026-08-19 17:02 UTCEPSS rescoreEPSS 0.2% · 13th percentile
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  47. 2026-08-16 14:54 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  48. 2026-08-16 14:00 UTCOSV refresh
  49. 2026-08-16 02:12 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  50. 2026-08-15 01:28 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  51. 2026-08-13 21:58 UTCEPSS rescoreEPSS 0.2% · 13th percentile
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  61. 2026-08-02 02:25 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  62. 2026-08-01 08:06 UTCOSV refresh
  63. 2026-08-01 04:14 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  64. 2026-07-30 16:26 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  65. 2026-07-30 01:29 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  66. 2026-07-28 15:34 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  67. 2026-07-27 14:11 UTCEPSS rescoreEPSS 0.2% · 13th percentile
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  71. 2026-07-23 14:17 UTCEPSS rescoreEPSS 0.2% · 13th percentile
  72. 2026-07-23 02:34 UTCEG score recompute

Related CVEs(same vendor)

Frequently asked(5)

What is CVE-2024-26746?
CVE-2024-26746 is a medium-severity vulnerability; its CVE record was published on April 4, 2024. In the Linux kernel, the following vulnerability has been resolved: dmaengine: idxd: Ensure safe user copy of completion record If CONFIG_HARDENED_USERCOPY is enabled, copying completion record from event log cache to user triggers a kernel bug. [ 1987.159822] usercopy: Kernel memory exposure…
When was the CVE record for CVE-2024-26746 published?
The CVE record for CVE-2024-26746 was published on April 4, 2024. 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 March 18, 2025; the record at its source may have been updated since.
Is CVE-2024-26746 actively exploited?
CVE-2024-26746 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (13th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2024-26746?
CVE-2024-26746 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2024-26746?
A fix for CVE-2024-26746 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2024-26746 are linked in the Vendor Advisories panel on this page.

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