CVE-2026-31698

HIGHPre-NVD 7.17.1—
EchelonGraph scoreMEDIUM confidence

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-05-01. the CNA's CVSS baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
7.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.1Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

crypto: ccp: Don't attempt to copy PDH cert to userspace if PSP command failed

When retrieving the PDH cert, don't attempt to copy the blobs to userspace if the firmware command failed. If the failure was due to an invalid length, i.e. the userspace buffer+length was too small, copying the number of bytes _firmware_ requires will overflow the kernel-allocated buffer and leak data to userspace.

BUG: KASAN: slab-out-of-bounds in instrument_copy_to_user ../include/linux/instrumented.h:129 [inline] BUG: KASAN: slab-out-of-bounds in _inline_copy_to_user ../include/linux/uaccess.h:205 [inline] BUG: KASAN: slab-out-of-bounds in _copy_to_user+0x66/0xa0 ../lib/usercopy.c:26 Read of size 2084 at addr ffff8885c4ab8aa0 by task syz.0.186/21033

CPU: 51 UID: 0 PID: 21033 Comm: syz.0.186 Tainted: G U O 7.0.0-smp-DEV #28 PREEMPTLAZY Tainted: [U]=USER, [O]=OOT_MODULE Hardware name: Google, Inc. Arcadia_IT_80/Arcadia_IT_80, BIOS 34.84.12-0 11/17/2025 Call Trace: dump_stack_lvl+0xc5/0x110 ../lib/dump_stack.c:120 print_address_description ../mm/kasan/report.c:378 [inline] print_report+0xbc/0x260 ../mm/kasan/report.c:482 kasan_report+0xa2/0xe0 ../mm/kasan/report.c:595 check_region_inline ../mm/kasan/generic.c:-1 [inline] kasan_check_range+0x264/0x2c0 ../mm/kasan/generic.c:200 instrument_copy_to_user ../include/linux/instrumented.h:129 [inline] _inline_copy_to_user ../include/linux/uaccess.h:205 [inline] _copy_to_user+0x66/0xa0 ../lib/usercopy.c:26 copy_to_user ../include/linux/uaccess.h:236 [inline] sev_ioctl_do_pdh_export+0x3d3/0x7c0 ../drivers/crypto/ccp/sev-dev.c:2347 sev_ioctl+0x2a2/0x490 ../drivers/crypto/ccp/sev-dev.c:2568 vfs_ioctl ../fs/ioctl.c:51 [inline] __do_sys_ioctl ../fs/ioctl.c:597 [inline] __se_sys_ioctl+0x11d/0x1b0 ../fs/ioctl.c:583 do_syscall_x64 ../arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xe0/0x800 ../arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x76/0x7e

WARN if the driver says the command succeeded, but the firmware error code says otherwise, as __sev_do_cmd_locked() is expected to return -EIO on any firwmware error.

CVSS v3
7.1
EG Score
7.1(medium)
EG Risk
37(Track)
EG Risk 37/100SSVC: 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
Severity71% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

May 1, 2026

Last Modified

August 5, 2026

Advisory Details (5)

Auto-updated May 6, 2026
No patch confirmed yet.
generic

crypto: ccp: Don't attempt to copy PDH cert to userspace if PSP command failed - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e76239fed3cffd6d304d8ca3ce23984fd24f57d3
generic

crypto: ccp: Don't attempt to copy PDH cert to userspace if PSP command failed - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b5c14bd4da1f376f385722fe1da993f1edab6472
generic

crypto: ccp: Don't attempt to copy PDH cert to userspace if PSP command failed - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/78b97e43d0b3e674d9d49ae56937b11e2ba3fcaf
generic

crypto: ccp: Don't attempt to copy PDH cert to userspace if PSP command failed - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/50808c13452dae43a2c90b1bbbf9daa16501ce70
generic

crypto: ccp: Don't attempt to copy PDH cert to userspace if PSP command failed - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/051e51aa55fd4cdc3e8283cf4476aeeb5f563274

Vendor Advisories for CVE-2026-31698(2)

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

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
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 ... 6.12.85-1~bpo12+1 (17 versions)6.12.85-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.1-1~exp1 (129 versions)7.0.3-1—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

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 7× in last 7d / 75× 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 264 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-31698?
CVE-2026-31698 is a high vulnerability published on May 1, 2026. In the Linux kernel, the following vulnerability has been resolved: crypto: ccp: Don't attempt to copy PDH cert to userspace if PSP command failed When retrieving the PDH cert, don't attempt to copy the blobs to userspace if the firmware command failed. If the failure was due to an invalid length,…
When was CVE-2026-31698 disclosed?
CVE-2026-31698 was first published in the National Vulnerability Database on May 1, 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-2026-31698 actively exploited?
CVE-2026-31698 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 97.5% of all scored CVEs.
What is the CVSS score of CVE-2026-31698?
CVE-2026-31698 has a CVSS v4.0 base score of 7.1 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-31698?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31698, 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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