CVE-2026-68143

HIGHPre-NVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-10. A secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.1%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

net: slip: serialize receive against buffer reallocation

sl_realloc_bufs() replaces rbuff and updates buffsize while holding sl->lock. slip_receive_buf() reads those fields and writes through rbuff without holding the lock.

An MTU change can therefore race with receive processing. An MTU shrink can expose the new smaller rbuff with the old larger bound, causing an out-of-bounds write. A receive callback which already loaded the old rbuff can instead continue writing after that buffer has been freed.

Serialize receive processing with sl_realloc_bufs() by holding sl->lock while consuming each receive batch.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100CISA SSVC

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
Severity78% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.1%
EPSS %ILE
2nd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 10, 2026

Last Modified

August 19, 2026

Advisory Details (5)

Auto-updated Aug 14, 2026
Patch available.
generic

net: slip: serialize receive against buffer reallocation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ee7f9bb9320add61f7b367d7e6cd55e3a3a4d65d
generic

net: slip: serialize receive against buffer reallocation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/eb3836eab47487823f362e6985e170a1e15f20fd
generic

net: slip: serialize receive against buffer reallocation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5d07b178bef511d69558cfc89fe1129258dc39f8
generic

net: slip: serialize receive against buffer reallocation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/44401f7dd9940ced7098930ef64f5a332f279fc2
generic

net: slip: serialize receive against buffer reallocation - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0e37bbd6d617eb52bace49390e99eaedc1af73ce

Vendor Advisories for CVE-2026-68143(4)

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

Patch Availability(4)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
redhatkernel-rt-0:4.18.0-553.164.1.rt7.505.el8_102026-09-17redhat
redhatkernel-0:4.18.0-553.164.1.el8_102026-09-17redhat
redhatkernel-0:6.12.0-211.56.1.el10_22026-09-17redhat
redhatkernel-0:5.14.0-687.48.1.el9_82026-09-15redhat

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 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
  • every version up to 6.12.101-1~deb12u1: fixed in 6.12.101-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.12.96-1 (32 versions)
  • every version up to 6.12.101-1: fixed in 6.12.101-1
—
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
—

Additional Vendor Advisories

(2)

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 28× in last 7d / 133× 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 258 total refreshes for this CVE.

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

Related CVEs(same vendor)

Frequently asked(5)

What is CVE-2026-68143?
CVE-2026-68143 is a high vulnerability published on August 10, 2026. In the Linux kernel, the following vulnerability has been resolved: net: slip: serialize receive against buffer reallocation slreallocbufs() replaces rbuff and updates buffsize while holding sl->lock. slipreceivebuf() reads those fields and writes through rbuff without holding the lock. An MTU…
When was CVE-2026-68143 disclosed?
CVE-2026-68143 was first published on August 10, 2026, with the most recent update on August 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-68143 actively exploited?
CVE-2026-68143 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.1% probability of exploitation in the next 30 days (2nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-68143?
CVE-2026-68143 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-68143?
A fix for CVE-2026-68143 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-68143 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-68143

Explore →

Is Your Infrastructure Affected by CVE-2026-68143?

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

Book a Demo →Browse All CVEs