CVE-2026-43493

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-19. the CNA's CVSS baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

A fix is available — apply it.

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

crypto: pcrypt - Fix handling of MAY_BACKLOG requests

MAY_BACKLOG requests can return EBUSY. Handle them by checking for that value and filtering out EINPROGRESS notifications.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
45%
KEV
Not listed

Published

May 19, 2026

Last Modified

August 5, 2026

Advisory Details (8)

Auto-updated Sep 16, 2026
No patch confirmed yet.
generic

crypto: pcrypt - Fix handling of MAY_BACKLOG requests - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/915b692e6cb723aac658c25eb82c58fd81235110
generic

crypto: pcrypt - Fix handling of MAY_BACKLOG requests - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/46271895ddfb1ba41f89f7e0dffbe9c2bcf7380a
generic

crypto: pcrypt - Fix handling of MAY_BACKLOG requests - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/77d55bc8675ee851ed639dc9be77325a8024cf67
generic

crypto: pcrypt - Fix handling of MAY_BACKLOG requests - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/eb34e243df57e32f4c08fa191f3602ea19076276
generic

crypto: pcrypt - Fix handling of MAY_BACKLOG requests - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9f1cbca178c03188e201ed175251372149bb25f2
generic

crypto: pcrypt - Fix handling of MAY_BACKLOG requests - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/76641449b28979ebd6c02e9598367e119e385236
generic

crypto: pcrypt - Fix handling of MAY_BACKLOG requests - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1d7f07df450bac3301938fbc4251f2611be4084e
generic

crypto: pcrypt - Fix handling of MAY_BACKLOG requests - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ae7e95638d956d556d74b9abb9e780d3bd3dcd9e

Vendor Advisories for CVE-2026-43493(5)

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

Patch Availability(31)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1074 (5.15.0-1074.78) @ jammy2026-08-24ubuntu
ubuntulinux-tools-raspi-6.17 (6.17.0-1021.21) @ questing2026-08-24ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-27.27) @ resolute2026-08-24ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1008.8) @ resolute2026-08-24ubuntu
ubuntulinux-tools-oracle-edge (6.17.0-1018.18~24.04.1) @ noble2026-08-24ubuntu
ubuntulinux-tools-oem-6.17 (6.17.0-1028.28) @ noble2026-08-24ubuntu
ubuntulinux-virtual-6.8 (6.8.0-134.134) @ noble2026-08-24ubuntu
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.185.166) @ jammy2026-08-24ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1014.14) @ resolute2026-08-24ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1057.58~22.04.1) @ jammy2026-08-24ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (6.8.0-134.134.1) @ noble2026-08-24ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1029.30) @ noble2026-08-24ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1032.33) @ noble2026-08-24ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1108.114~20.04.1) @ focal2026-08-24ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1013.13) @ resolute2026-08-24ubuntu
ubuntulinux-tools-nvidia-hwe-24.04 (6.17.0-1026.26) @ noble2026-08-24ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2049.50) @ noble2026-08-24ubuntu
ubuntulinux-tools-raspi-6.8 (6.8.0-1060.64) @ noble2026-08-24ubuntu
ubuntulinux-tools-realtime-hwe-24.04-edge (6.17.0-1017.19) @ questing2026-08-24ubuntu
ubuntulinux-tools-fips-6.8 (6.8.0-134.134+fips1) @ noble2026-08-24ubuntu
ubuntulinux-virtual-hwe-24.04 (6.17.0-40.40~24.04.1) @ noble2026-08-24ubuntu
ubuntulinux-tools-intel-iotg-edge (5.15.0.1106.112~20.04.1) @ focal2026-08-24ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-24ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-24ubuntu
ubuntulinux-tools-azure-6.17 (6.17.0-1021.21~24.04.1) @ noble2026-08-24ubuntu
ubuntulinux-tools-azure-fde-6.17 (6.17.0-1018.18~24.04.1) @ noble2026-08-24ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-08-24ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-08-24ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-08-24ubuntu
redhatkernel-0:6.12.0-211.49.1.el10_22026-08-20redhat
linuxKernel @ 5.10.258—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

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (54 versions)5.10.259-1—
linux-6.16.1.106-3~deb11u1 ... 6.1.174-1~deb11u1 (20 versions)6.1.176-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (53 versions)6.1.176-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.86-1~bpo12+1 (19 versions)6.12.86-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.4-1~bpo13+1 (134 versions)7.0.4-1—

Additional Vendor Advisories

(24)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 6× in last 7d / 38× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 419 total refreshes for this CVE.

  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-17 19:31 UTCEPSS rescore
  3. 2026-09-16 14:08 UTCEPSS rescore
  4. 2026-09-16 05:15 UTCEPSS rescore
  5. 2026-09-13 16:47 UTCEPSS rescore
  6. 2026-09-12 15:01 UTCEPSS rescore
  7. 2026-09-11 20:23 UTCOSV refresh
  8. 2026-09-11 14:53 UTCEPSS rescore
  9. 2026-09-11 09:37 UTCEPSS rescore
  10. 2026-09-10 09:34 UTCEPSS rescore
  11. 2026-09-08 22:00 UTCEPSS rescore
  12. 2026-09-07 16:01 UTCEPSS rescore
  13. 2026-09-06 13:47 UTCEPSS rescore
  14. 2026-09-04 05:06 UTCEPSS rescore
  15. 2026-09-02 14:12 UTCEPSS rescore
  16. 2026-09-01 13:54 UTCEPSS rescore
  17. 2026-08-30 19:17 UTCEPSS rescore
  18. 2026-08-30 01:22 UTCEPSS rescore
  19. 2026-08-28 21:41 UTCEPSS rescore
  20. 2026-08-27 14:25 UTCEPSS rescore
  21. 2026-08-26 14:46 UTCEPSS rescore
  22. 2026-08-25 13:49 UTCEPSS rescore
  23. 2026-08-24 00:32 UTCVendor advisory
  24. 2026-08-24 00:31 UTCGHSA enrichment
  25. 2026-08-23 20:49 UTCVendor advisory
Show 75 more
  1. 2026-08-23 20:48 UTCGHSA enrichment
  2. 2026-08-23 17:09 UTCEG score recompute
  3. 2026-08-23 17:09 UTCVendor advisory
  4. 2026-08-23 17:08 UTCGHSA enrichment
  5. 2026-08-23 00:19 UTCEPSS rescore
  6. 2026-08-21 23:49 UTCEPSS rescore
  7. 2026-08-21 23:40 UTCEG score recompute
  8. 2026-08-21 23:40 UTCVendor advisory
  9. 2026-08-21 23:39 UTCGHSA enrichment
  10. 2026-08-20 22:55 UTCEPSS rescore
  11. 2026-08-20 19:06 UTCEG score recompute
  12. 2026-08-20 19:06 UTCVendor advisory
  13. 2026-08-20 19:05 UTCGHSA enrichment
  14. 2026-08-19 17:04 UTCEPSS rescore
  15. 2026-08-18 13:48 UTCEPSS rescore
  16. 2026-08-17 13:47 UTCEPSS rescore
  17. 2026-08-17 13:42 UTCVendor advisory
  18. 2026-08-17 13:42 UTCGHSA enrichment
  19. 2026-08-17 10:02 UTCEG score recompute
  20. 2026-08-17 10:02 UTCVendor advisory
  21. 2026-08-17 10:01 UTCGHSA enrichment
  22. 2026-08-16 14:56 UTCEPSS rescore
  23. 2026-08-16 10:51 UTCVendor advisory
  24. 2026-08-16 10:51 UTCGHSA enrichment
  25. 2026-08-16 07:14 UTCVendor advisory
  26. 2026-08-16 07:14 UTCGHSA enrichment
  27. 2026-08-16 03:37 UTCEG score recompute
  28. 2026-08-16 03:37 UTCVendor advisory
  29. 2026-08-16 03:37 UTCGHSA enrichment
  30. 2026-08-16 02:14 UTCEPSS rescore
  31. 2026-08-15 01:30 UTCEPSS rescore
  32. 2026-08-14 23:57 UTCVendor advisory
  33. 2026-08-14 23:57 UTCGHSA enrichment
  34. 2026-08-14 20:20 UTCVendor advisory
  35. 2026-08-14 20:20 UTCGHSA enrichment
  36. 2026-08-14 16:42 UTCVendor advisory
  37. 2026-08-14 16:42 UTCGHSA enrichment
  38. 2026-08-14 12:59 UTCVendor advisory
  39. 2026-08-14 12:59 UTCGHSA enrichment
  40. 2026-08-14 09:22 UTCVendor advisory
  41. 2026-08-14 09:22 UTCGHSA enrichment
  42. 2026-08-14 05:45 UTCVendor advisory
  43. 2026-08-14 05:45 UTCGHSA enrichment
  44. 2026-08-14 02:08 UTCEG score recompute
  45. 2026-08-14 02:08 UTCVendor advisory
  46. 2026-08-14 02:08 UTCGHSA enrichment
  47. 2026-08-13 22:00 UTCEPSS rescore
  48. 2026-08-13 09:58 UTCVendor advisory
  49. 2026-08-13 09:58 UTCGHSA enrichment
  50. 2026-08-13 06:21 UTCVendor advisory
  51. 2026-08-13 06:21 UTCGHSA enrichment
  52. 2026-08-13 02:38 UTCVendor advisory
  53. 2026-08-13 02:38 UTCGHSA enrichment
  54. 2026-08-12 23:01 UTCVendor advisory
  55. 2026-08-12 23:01 UTCGHSA enrichment
  56. 2026-08-12 19:24 UTCVendor advisory
  57. 2026-08-12 19:24 UTCGHSA enrichment
  58. 2026-08-12 15:47 UTCEG score recompute
  59. 2026-08-12 15:47 UTCVendor advisory
  60. 2026-08-12 15:47 UTCGHSA enrichment
  61. 2026-08-12 13:51 UTCEPSS rescore
  62. 2026-08-12 12:06 UTCVendor advisory
  63. 2026-08-12 12:06 UTCGHSA enrichment
  64. 2026-08-12 02:05 UTCVendor advisory
  65. 2026-08-12 02:05 UTCGHSA enrichment
  66. 2026-08-11 22:27 UTCVendor advisory
  67. 2026-08-11 22:27 UTCGHSA enrichment
  68. 2026-08-11 18:48 UTCVendor advisory
  69. 2026-08-11 18:48 UTCGHSA enrichment
  70. 2026-08-11 13:55 UTCEG score recompute
  71. 2026-08-11 13:55 UTCVendor advisory
  72. 2026-08-11 13:55 UTCGHSA enrichment
  73. 2026-08-11 13:43 UTCEPSS rescore
  74. 2026-08-11 07:54 UTCVendor advisory
  75. 2026-08-11 07:54 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-43493?
CVE-2026-43493 is a critical vulnerability published on May 19, 2026. In the Linux kernel, the following vulnerability has been resolved: crypto: pcrypt - Fix handling of MAY_BACKLOG requests MAY_BACKLOG requests can return EBUSY. Handle them by checking for that value and filtering out EINPROGRESS notifications.
When was CVE-2026-43493 disclosed?
CVE-2026-43493 was first published in the National Vulnerability Database on May 19, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43493 actively exploited?
CVE-2026-43493 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 55.0% of all scored CVEs.
What is the CVSS score of CVE-2026-43493?
CVE-2026-43493 has a CVSS v4.0 base score of 9.8 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-43493?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43493, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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