CVE-2026-52937

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-06-24. 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:

tap: fix stack info leak in tap_ioctl() SIOCGIFHWADDR

In the SIOCGIFHWADDR path, tap_ioctl() copies 16 bytes of an uninitialised on-stack struct sockaddr_storage to userspace via ifr_hwaddr, but netif_get_mac_address() only writes sa_family and dev->addr_len (6 for Ethernet) bytes, leaving sa_data[6..13] uninitialised.

Those 8 trailing bytes leak kernel stack contents; SIOCGIFHWADDR on a macvtap chardev returns kernel .text and direct-map pointers, defeating KASLR.

Initialise ss at declaration.

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
2%
KEV
Not listed

Published

June 24, 2026

Last Modified

July 8, 2026

Advisory Details (3)

Auto-updated Jul 8, 2026
No patch confirmed yet.
generic

tap: fix stack info leak in tap_ioctl() SIOCGIFHWADDR - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/bddc09212c24934643bd44fc794748d2bbb3b6cd
generic

tap: fix stack info leak in tap_ioctl() SIOCGIFHWADDR - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/719007c3492f0f1f9e9cdbed8ac45ba45bb13eeb
generic

tap: fix stack info leak in tap_ioctl() SIOCGIFHWADDR - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/05305e832be7b9d65b2b72caacf7d850b3942b2a

Vendor Advisories for CVE-2026-52937(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) @ resolute2026-08-30ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-08-30ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-30ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-08-30ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-30ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-08-30ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-08-30ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-08-30ubuntu

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~rc7-1~exp1 (350 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (174 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (141 versions)7.0.12-1—

Weakness Classification(1)

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

All Vendor Advisories

(8)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 5× in last 7d / 60× 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 176 total refreshes for this CVE.

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

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-52937?
CVE-2026-52937 is a medium vulnerability published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: tap: fix stack info leak in tap_ioctl() SIOCGIFHWADDR In the SIOCGIFHWADDR path, tap_ioctl() copies 16 bytes of an uninitialised on-stack struct sockaddr_storage to userspace via ifrhwaddr, but netifgetmacaddress() only writes…
When was CVE-2026-52937 disclosed?
CVE-2026-52937 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on July 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52937 actively exploited?
CVE-2026-52937 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 98.4% of all scored CVEs.
What is the CVSS score of CVE-2026-52937?
CVE-2026-52937 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-52937?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52937, 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-2026-52937

Explore →

Is Your Infrastructure Affected by CVE-2026-52937?

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

Start Free Scan →Browse All CVEs