CVE-2026-46158

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-05-28. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

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

mptcp: pm: ADD_ADDR rtx: always decrease sk refcount

When an ADD_ADDR is retransmitted, the sk is held in sk_reset_timer(). It should then be released in all cases at the end.

Some (unlikely) checks were returning directly instead of calling sock_put() to decrease the refcount. Jump to a new 'exit' label to call __sock_put() (which will become sock_put() in the next commit) to fix this potential leak.

While at it, drop the '!msk' check which cannot happen because it is never reset, and explicitly mark the remaining one as "unlikely".

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
3%
KEV
Not listed

Published

May 28, 2026

Last Modified

August 27, 2026

Advisory Details (7)

Auto-updated Aug 27, 2026
No patch confirmed yet.
generic

mptcp: pm: ADD_ADDR rtx: always decrease sk refcount - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e9ba34301d2e90f63f97c76ad9eb98e5250fe961
generic

mptcp: pm: ADD_ADDR rtx: always decrease sk refcount - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b41dd76f3b9735096c21d3e799a2b9fe36498d57
generic

mptcp: pm: ADD_ADDR rtx: always decrease sk refcount - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/acd3d3562315c99f3c0db16f0fcc5f0306638982
generic

mptcp: pm: ADD_ADDR rtx: always decrease sk refcount - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9634cb35af17019baec21ca648516ce376fa10e6
generic

mptcp: pm: ADD_ADDR rtx: always decrease sk refcount - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9426265e157dd77ec237c795901ed4dea6d69b5c
generic

mptcp: pm: ADD_ADDR rtx: always decrease sk refcount - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/81d8142148164176385c279c7c1e1d581867423d
generic

mptcp: pm: ADD_ADDR rtx: always decrease sk refcount - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/25e37407442b8766ec2cf52fb4e31b5c3d3aeeae

Vendor Advisories for CVE-2026-46158(2)

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

Patch Availability(8)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-08-27ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-27ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-08-27ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-27ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-08-27ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16~24.04.1) @ noble2026-08-27ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-08-27ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-08-27ubuntu

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

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 7.2~rc5-1~exp1 (496 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 7.2~rc5-1~exp1 (335 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.94-1~bpo12+1 (27 versions)6.12.94-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.7-1~bpo13+1 (133 versions)7.0.7-1—

Additional Vendor Advisories

(8)

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 5× in last 7d / 73× 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 217 total refreshes for this CVE.

  1. 2026-09-04 05:06 UTCEPSS rescore
  2. 2026-09-02 14:12 UTCEPSS rescore
  3. 2026-09-01 13:54 UTCEPSS rescore
  4. 2026-08-30 19:17 UTCEPSS rescore
  5. 2026-08-30 01:22 UTCEPSS rescore
  6. 2026-08-28 21:41 UTCEPSS rescore
  7. 2026-08-27 14:25 UTCEPSS rescore
  8. 2026-08-27 13:35 UTCEG score recompute
  9. 2026-08-27 13:35 UTCVendor advisory
  10. 2026-08-27 13:35 UTCGHSA enrichment
  11. 2026-08-27 13:31 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  12. 2026-08-27 13:01 UTCEG score recompute
  13. 2026-08-27 13:01 UTCVendor advisory
  14. 2026-08-27 13:01 UTCGHSA enrichment
  15. 2026-08-26 14:46 UTCEPSS rescore
  16. 2026-08-25 13:49 UTCEPSS rescore
  17. 2026-08-25 04:53 UTCEG score recompute
  18. 2026-08-25 04:53 UTCVendor advisory
  19. 2026-08-25 04:53 UTCGHSA enrichment
  20. 2026-08-23 14:42 UTCEG score recompute
  21. 2026-08-23 14:42 UTCVendor advisory
  22. 2026-08-23 14:42 UTCGHSA enrichment
  23. 2026-08-23 00:19 UTCEPSS rescore
  24. 2026-08-21 23:49 UTCEPSS rescore
  25. 2026-08-21 15:35 UTCEG score recompute
Show 75 more
  1. 2026-08-21 15:35 UTCVendor advisory
  2. 2026-08-21 15:35 UTCGHSA enrichment
  3. 2026-08-20 22:55 UTCEPSS rescore
  4. 2026-08-20 10:58 UTCEG score recompute
  5. 2026-08-20 10:58 UTCVendor advisory
  6. 2026-08-20 10:58 UTCGHSA enrichment
  7. 2026-08-19 17:04 UTCEPSS rescore
  8. 2026-08-18 13:48 UTCEPSS rescore
  9. 2026-08-17 13:47 UTCEPSS rescore
  10. 2026-08-17 08:58 UTCEG score recompute
  11. 2026-08-17 08:58 UTCVendor advisory
  12. 2026-08-17 08:58 UTCGHSA enrichment
  13. 2026-08-16 14:56 UTCEPSS rescore
  14. 2026-08-16 02:38 UTCEG score recompute
  15. 2026-08-16 02:38 UTCVendor advisory
  16. 2026-08-16 02:38 UTCGHSA enrichment
  17. 2026-08-15 01:30 UTCEPSS rescore
  18. 2026-08-15 01:11 UTCVendor advisory
  19. 2026-08-15 01:11 UTCGHSA enrichment
  20. 2026-08-14 01:15 UTCEG score recompute
  21. 2026-08-14 01:15 UTCVendor advisory
  22. 2026-08-14 01:15 UTCGHSA enrichment
  23. 2026-08-13 22:00 UTCEPSS rescore
  24. 2026-08-12 23:59 UTCEG score recompute
  25. 2026-08-12 23:59 UTCVendor advisory
  26. 2026-08-12 23:59 UTCGHSA enrichment
  27. 2026-08-12 13:51 UTCEPSS rescore
  28. 2026-08-12 00:03 UTCVendor advisory
  29. 2026-08-12 00:03 UTCGHSA enrichment
  30. 2026-08-11 00:07 UTCEG score recompute
  31. 2026-08-11 00:07 UTCVendor advisory
  32. 2026-08-11 00:07 UTCGHSA enrichment
  33. 2026-08-11 00:00 UTCEPSS rescore
  34. 2026-08-09 20:52 UTCEG score recompute
  35. 2026-08-09 20:52 UTCVendor advisory
  36. 2026-08-09 20:52 UTCGHSA enrichment
  37. 2026-08-09 13:46 UTCEPSS rescore
  38. 2026-08-08 20:56 UTCEG score recompute
  39. 2026-08-08 20:56 UTCVendor advisory
  40. 2026-08-08 20:56 UTCGHSA enrichment
  41. 2026-08-08 16:37 UTCEPSS rescore
  42. 2026-08-07 20:40 UTCEG score recompute
  43. 2026-08-07 20:40 UTCVendor advisory
  44. 2026-08-07 20:40 UTCGHSA enrichment
  45. 2026-08-06 20:44 UTCEG score recompute
  46. 2026-08-06 20:44 UTCVendor advisory
  47. 2026-08-06 20:44 UTCGHSA enrichment
  48. 2026-08-06 13:47 UTCEPSS rescore
  49. 2026-08-05 20:48 UTCEG score recompute
  50. 2026-08-05 20:48 UTCVendor advisory
  51. 2026-08-05 20:48 UTCGHSA enrichment
  52. 2026-08-05 19:17 UTCEPSS rescore
  53. 2026-08-04 15:10 UTCEPSS rescore
  54. 2026-08-04 10:39 UTCEPSS rescore
  55. 2026-08-03 16:15 UTCEG score recompute
  56. 2026-08-03 16:15 UTCVendor advisory
  57. 2026-08-03 16:15 UTCGHSA enrichment
  58. 2026-08-03 10:36 UTCEPSS rescore
  59. 2026-08-02 14:40 UTCEG score recompute
  60. 2026-08-02 14:40 UTCVendor advisory
  61. 2026-08-02 14:40 UTCGHSA enrichment
  62. 2026-08-02 02:27 UTCEPSS rescore
  63. 2026-08-01 14:44 UTCEG score recompute
  64. 2026-08-01 14:44 UTCVendor advisory
  65. 2026-08-01 14:44 UTCGHSA enrichment
  66. 2026-08-01 04:16 UTCEPSS rescore
  67. 2026-07-31 06:41 UTCEG score recompute
  68. 2026-07-31 06:41 UTCVendor advisory
  69. 2026-07-31 06:41 UTCGHSA enrichment
  70. 2026-07-30 16:28 UTCEPSS rescore
  71. 2026-07-30 01:30 UTCEPSS rescore
  72. 2026-07-29 14:32 UTCEG score recompute
  73. 2026-07-29 14:32 UTCVendor advisory
  74. 2026-07-29 14:32 UTCGHSA enrichment
  75. 2026-07-28 15:36 UTCEPSS rescore

Frequently asked(5)

What is CVE-2026-46158?
CVE-2026-46158 is a medium vulnerability published on May 28, 2026. In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: ADD_ADDR rtx: always decrease sk refcount When an ADDADDR is retransmitted, the sk is held in skreset_timer(). It should then be released in all cases at the end. Some (unlikely) checks were returning directly instead of…
When was CVE-2026-46158 disclosed?
CVE-2026-46158 was first published in the National Vulnerability Database on May 28, 2026, with the most recent update on August 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-46158 actively exploited?
CVE-2026-46158 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 97.3% of all scored CVEs.
What is the CVSS score of CVE-2026-46158?
CVE-2026-46158 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-46158?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46158, 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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