CVE-2026-46170

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: free sk if last

When an ADD_ADDR is retransmitted, the sk is held in sk_reset_timer(), and released at the end.

If at that moment, it was the last reference being held, the sk would not be freed. sock_put() should then be called instead of __sock_put().

But that's not enough: if it is the last reference, sock_put() will call sk_free(), which will end up calling sk_stop_timer_sync() on the same timer, and waiting indefinitely to finish. So it is needed to mark that the timer is done at the end of the timer handler when it has not been rescheduled, not to call sk_stop_timer_sync() on "itself".

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: free sk if last - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b7b9a461569734d33d3259d58d2507adfac107ed
generic

mptcp: pm: ADD_ADDR rtx: free sk if last - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b74ad20198652b6b39a761c277ba65ae82b1e107
generic

mptcp: pm: ADD_ADDR rtx: free sk if last - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8143a224785ceaf2b0856e08d4498916f38228fb
generic

mptcp: pm: ADD_ADDR rtx: free sk if last - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6a3af482188f6db4186d1605f64d911d7330abb3
generic

mptcp: pm: ADD_ADDR rtx: free sk if last - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5da972efed3dc7599da6e2b5e8d906d1b7b1a728
generic

mptcp: pm: ADD_ADDR rtx: free sk if last - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/531c537b8fb620beabccfb1594e8d43cbebbb87a
generic

mptcp: pm: ADD_ADDR rtx: free sk if last - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1f26487e83e69462540bb1047139472957c913c6

Vendor Advisories for CVE-2026-46170(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-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-08-27ubuntu
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-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-27ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-08-27ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-08-27ubuntu
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 / 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 220 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 04:52 UTCEG score recompute
  18. 2026-08-25 04:52 UTCVendor advisory
  19. 2026-08-25 04:52 UTCGHSA enrichment
  20. 2026-08-23 14:41 UTCEG score recompute
  21. 2026-08-23 14:41 UTCVendor advisory
  22. 2026-08-23 14:41 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 10:56 UTCEG score recompute
  5. 2026-08-20 10:56 UTCVendor advisory
  6. 2026-08-20 10:56 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 08:56 UTCEG score recompute
  11. 2026-08-17 08:56 UTCVendor advisory
  12. 2026-08-17 08:55 UTCGHSA enrichment
  13. 2026-08-16 14:56 UTCEPSS rescore
  14. 2026-08-16 02:36 UTCEG score recompute
  15. 2026-08-16 02:36 UTCVendor advisory
  16. 2026-08-16 02:36 UTCGHSA enrichment
  17. 2026-08-16 02:14 UTCEPSS rescore
  18. 2026-08-15 01:30 UTCEPSS rescore
  19. 2026-08-14 07:08 UTCEG score recompute
  20. 2026-08-14 07:08 UTCVendor advisory
  21. 2026-08-14 07:08 UTCGHSA enrichment
  22. 2026-08-13 22:00 UTCEPSS rescore
  23. 2026-08-13 09:17 UTCEG score recompute
  24. 2026-08-13 09:17 UTCVendor advisory
  25. 2026-08-13 09:16 UTCGHSA enrichment
  26. 2026-08-12 13:51 UTCEPSS rescore
  27. 2026-08-12 11:25 UTCEG score recompute
  28. 2026-08-12 11:25 UTCVendor advisory
  29. 2026-08-12 11:25 UTCGHSA enrichment
  30. 2026-08-11 13:30 UTCEG score recompute
  31. 2026-08-11 13:30 UTCVendor advisory
  32. 2026-08-11 13:30 UTCGHSA enrichment
  33. 2026-08-11 00:00 UTCEPSS rescore
  34. 2026-08-10 14:25 UTCVendor advisory
  35. 2026-08-10 14:25 UTCGHSA enrichment
  36. 2026-08-09 16:28 UTCEG score recompute
  37. 2026-08-09 16:28 UTCVendor advisory
  38. 2026-08-09 16:28 UTCGHSA enrichment
  39. 2026-08-09 13:46 UTCEPSS rescore
  40. 2026-08-08 18:36 UTCEG score recompute
  41. 2026-08-08 18:36 UTCVendor advisory
  42. 2026-08-08 18:36 UTCGHSA enrichment
  43. 2026-08-08 16:37 UTCEPSS rescore
  44. 2026-08-07 16:32 UTCEG score recompute
  45. 2026-08-07 16:32 UTCVendor advisory
  46. 2026-08-07 16:32 UTCGHSA enrichment
  47. 2026-08-06 18:40 UTCEG score recompute
  48. 2026-08-06 18:40 UTCVendor advisory
  49. 2026-08-06 18:40 UTCGHSA enrichment
  50. 2026-08-06 13:47 UTCEPSS rescore
  51. 2026-08-05 20:48 UTCEG score recompute
  52. 2026-08-05 20:48 UTCVendor advisory
  53. 2026-08-05 20:48 UTCGHSA enrichment
  54. 2026-08-05 19:17 UTCEPSS rescore
  55. 2026-08-04 15:10 UTCEPSS rescore
  56. 2026-08-04 10:39 UTCEPSS rescore
  57. 2026-08-03 16:15 UTCEG score recompute
  58. 2026-08-03 16:15 UTCVendor advisory
  59. 2026-08-03 16:15 UTCGHSA enrichment
  60. 2026-08-03 10:36 UTCEPSS rescore
  61. 2026-08-02 12:36 UTCEG score recompute
  62. 2026-08-02 12:36 UTCVendor advisory
  63. 2026-08-02 12:36 UTCGHSA enrichment
  64. 2026-08-02 02:27 UTCEPSS rescore
  65. 2026-08-01 14:44 UTCEG score recompute
  66. 2026-08-01 14:44 UTCVendor advisory
  67. 2026-08-01 14:44 UTCGHSA enrichment
  68. 2026-08-01 04:16 UTCEPSS rescore
  69. 2026-07-31 06:37 UTCEG score recompute
  70. 2026-07-31 06:37 UTCVendor advisory
  71. 2026-07-31 06:37 UTCGHSA enrichment
  72. 2026-07-30 16:28 UTCEPSS rescore
  73. 2026-07-30 01:30 UTCEPSS rescore
  74. 2026-07-29 14:32 UTCEG score recompute
  75. 2026-07-29 14:32 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-46170?
CVE-2026-46170 is a medium vulnerability published on May 28, 2026. In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: ADD_ADDR rtx: free sk if last When an ADDADDR is retransmitted, the sk is held in skreset_timer(), and released at the end. If at that moment, it was the last reference being held, the sk would not be freed. sockput()…
When was CVE-2026-46170 disclosed?
CVE-2026-46170 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-2026-46170 actively exploited?
CVE-2026-46170 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-2026-46170?
CVE-2026-46170 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-46170?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-46170, 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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