CVE-2026-45998

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-27. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 6 sources updated this week
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

A fix is available — apply it.

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

rxrpc: Fix potential UAF after skb_unshare() failure

If skb_unshare() fails to unshare a packet due to allocation failure in rxrpc_input_packet(), the skb pointer in the parent (rxrpc_io_thread()) will be NULL'd out. This will likely cause the call to trace_rxrpc_rx_done() to oops.

Fix this by moving the unsharing down to where rxrpc_input_call_event() calls rxrpc_input_call_packet(). There are a number of places prior to that where we ignore DATA packets for a variety of reasons (such as the call already being complete) for which an unshare is then avoided.

And with that, rxrpc_input_packet() doesn't need to take a pointer to the pointer to the packet, so change that to just a pointer.

CVSS v3
7.8
EG Score
7.8(medium)
EPSS
2.9%
KEV
Not listed

Published

May 27, 2026

Last Modified

July 15, 2026

Advisory Details (5)

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

rxrpc: Fix potential UAF after skb_unshare() failure - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e3bf143b1e98fb3d6d9e6825bcd683974d478e8c
generic

rxrpc: Fix potential UAF after skb_unshare() failure - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/bf20f46d94f1db38e6ffc0ca204a5fe0de01b495
generic

rxrpc: Fix potential UAF after skb_unshare() failure - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/996b0487b3cdda4c91811dbb1c9564626bc840bd
generic

rxrpc: Fix potential UAF after skb_unshare() failure - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8fde6296c4d4da2be7ab761305ab7f232b94eefd
generic

rxrpc: Fix potential UAF after skb_unshare() failure - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1f2740150f904bfa60e4bad74d65add3ccb5e7f8

Vendor Advisories for CVE-2026-45998(3)

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

Patch Availability(11)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-24.04-edge (6.17.0-35.35) @ questing2026-07-11ubuntu
ubuntulinux-virtual-6.8 (6.8.0-124.124) @ noble2026-07-11ubuntu
ubuntulinux-tools-gcp-64k-6.17 (6.17.0-1018.19) @ questing2026-07-11ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1059.65+fips1) @ noble2026-07-11ubuntu
ubuntulinux-tools-azure-edge (6.8.0-1059.65~22.04.1) @ jammy2026-07-11ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1008.8) @ resolute2026-07-11ubuntu
ubuntulinux-tools-lowlatency-hwe-20.04-edge (6.8.0-134.134.1) @ noble2026-07-11ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1032.33) @ noble2026-07-11ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-22.22) @ resolute2026-07-11ubuntu
ubuntulinux-tools-azure-7.0 (7.0.0-1007.7) @ resolute2026-07-11ubuntu
redhatkernel-0:6.12.0-211.30.1.el10_22026-07-02redhat

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(2)

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

Additional Vendor Advisories

(10)

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 11× in last 7d / 82× 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 127 total refreshes for this CVE.

  1. 2026-07-15 16:57 UTCEPSS rescore
  2. 2026-07-15 02:25 UTCNVD updateCVSS v3 → 7.8
  3. 2026-07-15 01:21 UTCMITRE cvelistV5CVSS v3 → 7
  4. 2026-07-13 22:30 UTCEPSS rescore
  5. 2026-07-13 06:13 UTCEPSS rescore
  6. 2026-07-12 05:46 UTCEPSS rescore
  7. 2026-07-11 23:55 UTCEG score recompute
  8. 2026-07-11 23:55 UTCVendor advisory
  9. 2026-07-11 23:54 UTCGHSA enrichment
  10. 2026-07-11 08:27 UTCEPSS rescore
  11. 2026-07-09 19:10 UTCEPSS rescore
  12. 2026-07-09 00:01 UTCEG score recompute
  13. 2026-07-09 00:01 UTCVendor advisory
  14. 2026-07-09 00:01 UTCGHSA enrichment
  15. 2026-07-08 15:16 UTCEPSS rescore
  16. 2026-07-07 13:46 UTCEPSS rescore
  17. 2026-07-06 16:27 UTCEPSS rescore
  18. 2026-07-06 02:23 UTCEPSS rescore
  19. 2026-07-05 02:30 UTCEPSS rescore
  20. 2026-07-04 06:31 UTCEPSS rescore
  21. 2026-07-01 10:50 UTCEG score recompute
  22. 2026-07-01 10:50 UTCVendor advisory
  23. 2026-07-01 10:49 UTCGHSA enrichment
  24. 2026-06-30 23:22 UTCEPSS rescore
  25. 2026-06-30 03:56 UTCEG score recompute
Show 75 more
  1. 2026-06-30 03:56 UTCVendor advisory
  2. 2026-06-30 03:55 UTCGHSA enrichment
  3. 2026-06-29 14:25 UTCEG score recompute
  4. 2026-06-29 14:25 UTCVendor advisory
  5. 2026-06-29 14:24 UTCGHSA enrichment
  6. 2026-06-29 14:06 UTCEPSS rescore
  7. 2026-06-29 14:06 UTCEPSS rescore
  8. 2026-06-28 22:07 UTCEG score recompute
  9. 2026-06-28 22:07 UTCVendor advisory
  10. 2026-06-28 22:07 UTCGHSA enrichment
  11. 2026-06-28 14:07 UTCEPSS rescore
  12. 2026-06-28 08:56 UTCEG score recompute
  13. 2026-06-28 08:56 UTCVendor advisory
  14. 2026-06-28 08:55 UTCGHSA enrichment
  15. 2026-06-28 04:56 UTCEPSS rescore
  16. 2026-06-28 04:56 UTCEPSS rescore
  17. 2026-06-27 19:48 UTCEG score recompute
  18. 2026-06-27 19:48 UTCVendor advisory
  19. 2026-06-27 19:48 UTCGHSA enrichment
  20. 2026-06-27 06:33 UTCEG score recompute
  21. 2026-06-27 06:33 UTCVendor advisory
  22. 2026-06-27 06:33 UTCGHSA enrichment
  23. 2026-06-27 03:08 UTCEPSS rescore
  24. 2026-06-26 17:10 UTCEG score recompute
  25. 2026-06-26 17:10 UTCVendor advisory
  26. 2026-06-26 17:10 UTCGHSA enrichment
  27. 2026-06-26 03:40 UTCEG score recompute
  28. 2026-06-26 03:40 UTCVendor advisory
  29. 2026-06-26 03:40 UTCGHSA enrichment
  30. 2026-06-25 14:33 UTCEG score recompute
  31. 2026-06-25 14:33 UTCVendor advisory
  32. 2026-06-25 14:32 UTCGHSA enrichment
  33. 2026-06-25 13:49 UTCEPSS rescore
  34. 2026-06-25 01:25 UTCEG score recompute
  35. 2026-06-25 01:25 UTCVendor advisory
  36. 2026-06-25 01:24 UTCGHSA enrichment
  37. 2026-06-24 14:05 UTCEPSS rescore
  38. 2026-06-23 21:33 UTCEPSS rescore
  39. 2026-06-23 21:33 UTCEPSS rescore
  40. 2026-06-22 14:25 UTCEPSS rescore
  41. 2026-06-22 14:25 UTCEPSS rescore
  42. 2026-06-21 14:56 UTCEPSS rescore
  43. 2026-06-21 14:56 UTCEPSS rescore
  44. 2026-06-21 01:59 UTCEPSS rescore
  45. 2026-06-21 01:59 UTCEPSS rescore
  46. 2026-06-19 19:26 UTCEPSS rescore
  47. 2026-06-19 19:26 UTCEPSS rescore
  48. 2026-06-18 17:52 UTCEPSS rescore
  49. 2026-06-18 17:52 UTCEPSS rescore
  50. 2026-06-17 21:26 UTCEG score recompute
  51. 2026-06-17 21:26 UTCVendor advisory
  52. 2026-06-17 21:25 UTCGHSA enrichment
  53. 2026-06-17 17:53 UTCEPSS rescore
  54. 2026-06-17 08:16 UTCEG score recompute▲ 7.80
  55. 2026-06-17 08:16 UTCVendor advisory
  56. 2026-06-17 08:16 UTCGHSA enrichment
  57. 2026-06-16 17:52 UTCEPSS rescore
  58. 2026-06-16 13:46 UTCNVD updateCVSS v3 → 7.8 · severity → HIGH
  59. 2026-06-15 17:49 UTCEPSS rescore
  60. 2026-06-14 23:28 UTCMITRE cvelistV5
  61. 2026-06-14 15:09 UTCVendor advisory
  62. 2026-06-14 15:09 UTCGHSA enrichment
  63. 2026-06-13 23:00 UTCEPSS rescore
  64. 2026-06-12 23:12 UTCEPSS rescore
  65. 2026-06-12 23:12 UTCEPSS rescore
  66. 2026-06-11 22:02 UTCVendor advisory
  67. 2026-06-11 22:02 UTCGHSA enrichment
  68. 2026-06-11 14:00 UTCEPSS rescore
  69. 2026-06-10 22:18 UTCEPSS rescore
  70. 2026-06-10 13:22 UTCEPSS rescore
  71. 2026-06-10 13:22 UTCEPSS rescore
  72. 2026-06-09 04:56 UTCVendor advisory
  73. 2026-06-09 04:56 UTCGHSA enrichment
  74. 2026-06-08 14:17 UTCEPSS rescore
  75. 2026-06-08 14:17 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-45998?
CVE-2026-45998 is a high vulnerability published on May 27, 2026. In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix potential UAF after skb_unshare() failure If skb_unshare() fails to unshare a packet due to allocation failure in rxrpcinputpacket(), the skb pointer in the parent (rxrpciothread()) will be NULL'd out. This will likely…
When was CVE-2026-45998 disclosed?
CVE-2026-45998 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-2026-45998 actively exploited?
CVE-2026-45998 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45998?
CVE-2026-45998 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-45998?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45998, 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

Explore the affected products and dependency analysis for CVE-2026-45998

Explore →

Is Your Infrastructure Affected by CVE-2026-45998?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Start Free Scan →Browse All CVEs