CVE-2026-45898

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-27. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.8Exploit: NoneExposed: 0

A fix is available — apply it.

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

RDMA/iwcm: Fix workqueue list corruption by removing work_list

The commit e1168f0 ("RDMA/iwcm: Simplify cm_event_handler()") changed the work submission logic to unconditionally call queue_work() with the expectation that queue_work() would have no effect if work was already pending. The problem is that a free list of struct iwcm_work is used (for which struct work_struct is embedded), so each call to queue_work() is basically unique and therefore does indeed queue the work.

This causes a problem in the work handler which walks the work_list until it's empty to process entries. This means that a single run of the work handler could process item N+1 and release it back to the free list while the actual workqueue entry is still queued. It could then get reused (INIT_WORK...) and lead to list corruption in the workqueue logic.

Fix this by just removing the work_list. The workqueue already does this for us.

This fixes the following error that was observed when stress testing with ucmatose on an Intel E830 in iWARP mode:

[ 151.465780] list_del corruption. next->prev should be ffff9f0915c69c08, but was ffff9f0a1116be08. (next=ffff9f0a15b11c08) [ 151.466639] ------------[ cut here ]------------ [ 151.466986] kernel BUG at lib/list_debug.c:67! [ 151.467349] Oops: invalid opcode: 0000 [#1] SMP NOPTI [ 151.467753] CPU: 14 UID: 0 PID: 2306 Comm: kworker/u64:18 Not tainted 6.19.0-rc4+ #1 PREEMPT(voluntary) [ 151.468466] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 151.469192] Workqueue: 0x0 (iw_cm_wq) [ 151.469478] RIP: 0010:__list_del_entry_valid_or_report+0xf0/0x100 [ 151.469942] Code: c7 58 5f 4c b2 e8 10 50 aa ff 0f 0b 48 89 ef e8 36 57 cb ff 48 8b 55 08 48 89 e9 48 89 de 48 c7 c7 a8 5f 4c b2 e8 f0 4f aa ff <0f> 0b 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 [ 151.471323] RSP: 0000:ffffb15644e7bd68 EFLAGS: 00010046 [ 151.471712] RAX: 000000000000006d RBX: ffff9f0915c69c08 RCX: 0000000000000027 [ 151.472243] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff9f0a37d9c600 [ 151.472768] RBP: ffff9f0a15b11c08 R08: 0000000000000000 R09: c0000000ffff7fff [ 151.473294] R10: 0000000000000001 R11: ffffb15644e7bba8 R12: ffff9f092339ee68 [ 151.473817] R13: ffff9f0900059c28 R14: ffff9f092339ee78 R15: 0000000000000000 [ 151.474344] FS: 0000000000000000(0000) GS:ffff9f0a847b5000(0000) knlGS:0000000000000000 [ 151.474934] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 151.475362] CR2: 0000559e233a9088 CR3: 000000020296b004 CR4: 0000000000770ef0 [ 151.475895] PKRU: 55555554 [ 151.476118] Call Trace: [ 151.476331] [ 151.476497] move_linked_works+0x49/0xa0 [ 151.476792] __pwq_activate_work.isra.46+0x2f/0xa0 [ 151.477151] pwq_dec_nr_in_flight+0x1e0/0x2f0 [ 151.477479] process_scheduled_works+0x1c8/0x410 [ 151.477823] worker_thread+0x125/0x260 [ 151.478108] ? __pfx_worker_thread+0x10/0x10 [ 151.478430] kthread+0xfe/0x240 [ 151.478671] ? __pfx_kthread+0x10/0x10 [ 151.478955] ? __pfx_kthread+0x10/0x10 [ 151.479240] ret_from_fork+0x208/0x270 [ 151.479523] ? __pfx_kthread+0x10/0x10 [ 151.479806] ret_from_fork_asm+0x1a/0x30 [ 151.480103]

CVSS v3
9.8
EG Score
9.8(medium)
EPSS
37.7%
KEV
Not listed

Published

May 27, 2026

Last Modified

July 15, 2026

Advisory Details (10)

Auto-updated Jul 16, 2026
Patch available. Sources: redhat.
redhat Patch Available

2482031 – (CVE-2026-45898) CVE-2026-45898 kernel: RDMA/iwcm: Fix workqueue list corruption by removing work_list

Affected: Red Hat Enterprise Linux 10.0 Extended Update Support

https://bugzilla.redhat.com/show_bug.cgi?id=2482031
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2026-45898
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.

https://access.redhat.com/errata/RHSA-2026:30848
redhat Patch Available

Affected: Red Hat Enterprise Linux 10.

https://access.redhat.com/errata/RHSA-2026:30129
redhat Patch Available

Affected: Red Hat Enterprise Linux 10.0 Extended Update Support.

https://access.redhat.com/errata/RHSA-2026:27731
redhat Patch Available

Affected: Red Hat Enterprise Linux 9.6 Extended Update Support.

https://access.redhat.com/errata/RHSA-2026:27708
generic

RDMA/iwcm: Fix workqueue list corruption by removing work_list - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/eb715133e0ae12514bba4d2d5ce1dee774476056
generic

RDMA/iwcm: Fix workqueue list corruption by removing work_list - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a6b9e793e74e372daa266fd0d58b751305877897
generic

RDMA/iwcm: Fix workqueue list corruption by removing work_list - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7874eeacfa42177565c01d5198726671acf7adf2
generic

RDMA/iwcm: Fix workqueue list corruption by removing work_list - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/38c5b49fffa1b760959af74f11806eeb3ef4706d

Vendor Advisories for CVE-2026-45898(5)

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

Patch Availability(7)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-oem-6.17 (6.17.0-1028.28) @ noble2026-07-09ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.17.0-40.40) @ questing2026-07-09ubuntu
ubuntulinux-tools-nvidia-hwe-24.04 (6.17.0-1026.26) @ noble2026-07-09ubuntu
redhatkernel-0:5.14.0-687.19.1.el9_82026-06-29redhat
redhatkernel-0:6.12.0-211.28.1.el10_22026-06-25redhat
redhatkernel-0:6.12.0-55.82.1.el10_02026-06-22redhat
redhatkernel-0:5.14.0-570.123.1.el9_62026-06-22redhat

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.

Weakness Classification(1)

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

Additional Vendor Advisories

(3)

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 / 84× 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 227 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-45898?
CVE-2026-45898 is a critical vulnerability published on May 27, 2026. In the Linux kernel, the following vulnerability has been resolved: RDMA/iwcm: Fix workqueue list corruption by removing work_list The commit e1168f0 ("RDMA/iwcm: Simplify cmeventhandler()") changed the work submission logic to unconditionally call queuework() with the expectation that queuework()…
When was CVE-2026-45898 disclosed?
CVE-2026-45898 was first published in the National Vulnerability Database on May 27, 2026, with the most recent update on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45898 actively exploited?
CVE-2026-45898 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 37.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45898?
CVE-2026-45898 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-45898?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45898, 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.

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