CVE-2026-31408

HIGHNVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-04-06. NVD baseline CVSS 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
8.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 8.8Exploit: None knownExposed: 0

A fix is available — apply it.

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

Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold

sco_recv_frame() reads conn->sk under sco_conn_lock() but immediately releases the lock without holding a reference to the socket. A concurrent close() can free the socket between the lock release and the subsequent sk->sk_state access, resulting in a use-after-free.

Other functions in the same file (sco_sock_timeout(), sco_conn_del()) correctly use sco_sock_hold() to safely hold a reference under the lock.

Fix by using sco_sock_hold() to take a reference before releasing the lock, and adding sock_put() on all exit paths.

CVSS v3
8.8
EG Score
8.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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
Severity88% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
23%
KEV
Not listed

Published

April 6, 2026

Last Modified

August 19, 2026

Advisory Details (7)

Auto-updated May 2, 2026
No patch confirmed yet.
generic

Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e76e8f0581ef555eacc11dbb095e602fb30a5361
generic

Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d57384e27d1ebf0047e3f00a6e1181b8be9857a2
generic

Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b0a7da0e3f7442545f071499beb36374714bb9de
generic

Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7197462e90b8ce15caa1ae15d4bc2bb8cd21b11e
generic

Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/598dbba9919c5e36c54fe1709b557d64120cb94b
generic

Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/45aaca995e4a7a05b272a58e7ab2fff4f611b8f1
generic

Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/108b81514d8f2535eb16651495cefb2250528db3

Vendor Advisories for CVE-2026-31408(14)

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

Patch Availability(31)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-08-19ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-08-19ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-08-19ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-08-19ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-08-19ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-08-19ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-08-19ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-08-19ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-08-19ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-08-19ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1117.102) @ jammy2026-08-19ubuntu
ubuntulinux-tools-intel-iot-realtime-5.15 (5.15.0.1104.108) @ jammy2026-08-19ubuntu
ubuntulinux-tools-intel-iotg-5.15 (5.15.0.1107.106) @ jammy2026-08-19ubuntu
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-08-19ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-08-19ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-08-19ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-08-19ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1058.61) @ noble2026-08-19ubuntu
redhatkernel-0:4.18.0-477.152.1.el8_82026-07-16redhat
redhatkernel-0:6.12.0-55.88.1.el10_02026-07-14redhat
redhatkernel-0:5.14.0-570.127.1.el9_62026-07-13redhat
redhatkernel-0:5.14.0-427.136.1.el9_42026-07-08redhat
redhatkernel-0:5.14.0-284.179.1.el9_22026-07-07redhat
redhatkernel-rt-0:5.14.0-284.179.1.rt14.464.el9_22026-07-06redhat
redhatkernel-0:4.18.0-372.199.1.el8_62026-07-06redhat
redhatkernel-0:4.18.0-305.197.1.el8_42026-07-06redhat
redhatkernel-0:4.18.0-553.126.1.el8_102026-05-28redhat
redhatkernel-0:5.14.0-687.12.1.el9_82026-05-28redhat
redhatkernel-rt-0:4.18.0-553.126.1.rt7.467.el8_102026-05-28redhat
redhatkernel-0:6.12.0-211.16.1.el10_22026-05-20redhat
linuxKernel @ 5.15.203—osv

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

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 7.2~rc5-1~exp1 (496 versions)——
linux-6.16.1.106-3~deb11u1 ... 6.1.164-1~deb11u1 (16 versions)6.1.170-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (48 versions)6.1.170-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.85-1~bpo12+1 (17 versions)6.12.85-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.19~rc8-1~exp1 (121 versions)6.19.11-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(12)

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 7× in last 7d / 81× 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 221 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-31408?
CVE-2026-31408 is a high vulnerability published on April 6, 2026. In the Linux kernel, the following vulnerability has been resolved: Bluetooth: SCO: Fix use-after-free in scorecvframe() due to missing sock_hold scorecvframe() reads conn->sk under scoconnlock() but immediately releases the lock without holding a reference to the socket. A concurrent close() can…
When was CVE-2026-31408 disclosed?
CVE-2026-31408 was first published in the National Vulnerability Database on April 6, 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-2026-31408 actively exploited?
CVE-2026-31408 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 77.0% of all scored CVEs.
What is the CVSS score of CVE-2026-31408?
CVE-2026-31408 has a CVSS v3 base score of 8.8 (NVD).
How do I remediate CVE-2026-31408?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31408, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-31408

Explore →

Is Your Infrastructure Affected by CVE-2026-31408?

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

Start Free Scan →Browse All CVEs