CVE-2026-68169

UNRATEDCVSS · not yet scored
—
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS v2: —Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

mptcp: pm: userspace: fix use-after-free in get_local_id

In mptcp_pm_userspace_get_local_id(), the address entry is looked up under spinlock, but its id is read after dropping the lock. A concurrent deletion can free the entry between the unlock and the read, leading to UAF.

The race window is narrow. It was reproduced only with a locally constructed stress test that repeatedly overlaps an MP_JOIN SYN with a MPTCP_PM_CMD_SUBFLOW_DESTROY request.

However, the KASAN report below confirms that the race is reachable:

[ 666.319376] BUG: KASAN: slab-use-after-free in mptcp_userspace_pm_get_local_id+0x1dc/0x1f0 [ 666.319386] Read of size 1 at addr ffff888124845610 by task swapper/0/0 ... [ 666.319401] Call Trace: [ 666.319405] [ 666.319408] dump_stack_lvl+0x53/0x70 [ 666.319412] print_address_description.constprop.0+0x2c/0x3b0 [ 666.319418] print_report+0xbe/0x2b0 [ 666.319421] ? mptcp_userspace_pm_get_local_id+0x1dc/0x1f0 [ 666.319423] kasan_report+0xce/0x100 [ 666.319426] ? mptcp_userspace_pm_get_local_id+0x1dc/0x1f0 [ 666.319429] mptcp_userspace_pm_get_local_id+0x1dc/0x1f0 [ 666.319433] mptcp_pm_get_local_id+0x371/0x440 ... [ 666.319821] Allocated by task 45539: [ 666.319844] kasan_save_stack+0x33/0x60 [ 666.319855] kasan_save_track+0x14/0x30 [ 666.319858] __kasan_kmalloc+0x8f/0xa0 [ 666.319863] __kmalloc_noprof+0x1e7/0x520 [ 666.319867] sock_kmalloc+0xdf/0x130 [ 666.319885] sock_kmemdup+0x1b/0x40 [ 666.319888] mptcp_userspace_pm_append_new_local_addr+0x261/0x500 [ 666.319910] mptcp_pm_nl_announce_doit+0x16a/0x610 ... [ 666.319967] Freed by task 45560: [ 666.319988] kasan_save_stack+0x33/0x60 [ 666.319991] kasan_save_track+0x14/0x30 [ 666.319994] kasan_save_free_info+0x3b/0x60 [ 666.319998] __kasan_slab_free+0x43/0x70 [ 666.320000] kfree+0x166/0x440 [ 666.320003] sock_kfree_s+0x1d/0x50 [ 666.320007] mptcp_userspace_pm_delete_local_addr.isra.0+0x157/0x200 [ 666.320011] mptcp_pm_nl_subflow_destroy_doit+0x51d/0xea0

Fix by copying the id into a local variable while still holding the lock, and use -1 as a "not found" sentinel.

CVSS v3
—
EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
—
EG Risk
—
EPSS PROB
0.2%
EPSS %ILE
10th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

EG Severity
Not assessed: no CVSS publishedA missing CVSS is not a severity of zero.
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
No SSVC decision: EchelonGraph has not assessed this CVECISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the BOD 26-04 block below.

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 10, 2026

Last Modified

August 23, 2026

References (6)

Vendor Advisories for CVE-2026-68169(2)

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

Affected Packages

(4 across 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (56 versions)
  • every version up to 6.1.187-1: fixed in 6.1.187-1
—
linux-6.126.12.100-1~deb12u1, 6.12.101-1~deb12u1
  • every version up to 6.12.107-1~deb12u1: fixed in 6.12.107-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.12.96-1 (33 versions)
  • every version up to 6.12.105-1: fixed in 6.12.105-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (161 versions)
  • every version up to 7.1.6-1: fixed in 7.1.6-1
—

Data Freshness Timeline

(refreshed 8× in last 7d / 39× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

  1. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  2. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  3. 2026-10-18 03:20 UTCEG score recompute
  4. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  5. 2026-10-16 16:43 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  6. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  7. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  8. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  9. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  10. 2026-10-12 15:45 UTCEG score recompute
  11. 2026-10-11 19:30 UTCEG score recompute
  12. 2026-10-11 16:45 UTCEG score recompute
  13. 2026-10-11 14:06 UTCEG score recompute
  14. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  15. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  16. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  17. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  18. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  19. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  20. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  21. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  22. 2026-10-04 05:26 UTCVendor advisory
  23. 2026-10-04 05:26 UTCGHSA enrichmentGHSA-479w-3phx-jjxq
  24. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  25. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.2% · 10th percentile
Show 68 more
  1. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  2. 2026-09-30 22:42 UTCEG score recompute
  3. 2026-09-30 22:42 UTCVendor advisory
  4. 2026-09-30 22:42 UTCGHSA enrichmentGHSA-479w-3phx-jjxq
  5. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  6. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  7. 2026-09-27 16:57 UTCVendor advisory
  8. 2026-09-27 16:57 UTCGHSA enrichmentGHSA-479w-3phx-jjxq
  9. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  10. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  11. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  12. 2026-09-22 13:46 UTCVendor advisory
  13. 2026-09-22 13:46 UTCGHSA enrichmentGHSA-479w-3phx-jjxq
  14. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  15. 2026-09-19 08:11 UTCVendor advisory
  16. 2026-09-19 08:11 UTCGHSA enrichmentGHSA-479w-3phx-jjxq
  17. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  18. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  19. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  20. 2026-09-16 02:37 UTCVendor advisory
  21. 2026-09-16 02:37 UTCGHSA enrichmentGHSA-479w-3phx-jjxq
  22. 2026-09-12 11:52 UTCVendor advisory
  23. 2026-09-12 11:52 UTCGHSA enrichmentGHSA-479w-3phx-jjxq
  24. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  25. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  26. 2026-09-09 05:54 UTCGHSA enrichmentGHSA-479w-3phx-jjxq
  27. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  28. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  29. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  30. 2026-09-05 15:43 UTCGHSA enrichmentGHSA-479w-3phx-jjxq
  31. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  32. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  33. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  34. 2026-09-02 06:29 UTCGHSA enrichmentGHSA-479w-3phx-jjxq
  35. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  36. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  37. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  38. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  39. 2026-08-30 00:31 UTCGHSA enrichmentGHSA-479w-3phx-jjxq
  40. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  41. 2026-08-26 18:56 UTCGHSA enrichmentGHSA-479w-3phx-jjxq
  42. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  43. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  44. 2026-08-23 13:20 UTCGHSA enrichmentGHSA-479w-3phx-jjxq
  45. 2026-08-23 13:19 UTCNVD update
  46. 2026-08-23 13:08 UTCGHSA enrichmentGHSA-479w-3phx-jjxq
  47. 2026-08-23 13:05 UTCMITRE cvelistV5
  48. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  49. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  50. 2026-08-20 22:56 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  51. 2026-08-20 11:14 UTCGHSA enrichmentGHSA-479w-3phx-jjxq
  52. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  53. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  54. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  55. 2026-08-17 05:40 UTCGHSA enrichmentGHSA-479w-3phx-jjxq
  56. 2026-08-17 05:26 UTCNVD update
  57. 2026-08-17 05:10 UTCGHSA enrichmentGHSA-479w-3phx-jjxq
  58. 2026-08-17 05:05 UTCMITRE cvelistV5
  59. 2026-08-17 00:35 UTCGHSA enrichmentGHSA-479w-3phx-jjxq
  60. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  61. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  62. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  63. 2026-08-13 19:01 UTCEG score recompute
  64. 2026-08-13 19:01 UTCGHSA enrichmentGHSA-479w-3phx-jjxq
  65. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  66. 2026-08-10 13:24 UTCNVD update
  67. 2026-08-10 12:20 UTCEG score recompute
  68. 2026-08-10 12:17 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-68169?
CVE-2026-68169 is a vulnerability whose severity is not yet rated; its CVE record was published on August 10, 2026. In the Linux kernel, the following vulnerability has been resolved: mptcp: pm: userspace: fix use-after-free in getlocalid In mptcppmuserspacegetlocal_id(), the address entry is looked up under spinlock, but its id is read after dropping the lock. A concurrent deletion can free the entry between…
When was the CVE record for CVE-2026-68169 published?
The CVE record for CVE-2026-68169 was published on August 10, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of August 23, 2026; the record at its source may have been updated since.
Is CVE-2026-68169 actively exploited?
CVE-2026-68169 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (10th percentile of EPSS-scored CVEs).
How do I remediate CVE-2026-68169?
A fix for CVE-2026-68169 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-68169 are linked in the Vendor Advisories panel on this page.

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