CVE-2026-52916

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:

batman-adv: frag: disallow unicast fragment in fragment

batadv_frag_skb_buffer() is called by batadv_batman_skb_recv() when a BATADV_UNICAST_FRAG packet is received. Once all fragments are collected and the packet is reassembled, batadv_recv_frag_packet() calls batadv_batman_skb_recv() again to process the defragmented payload.

A malicious sender can craft a BATADV_UNICAST_FRAG packet whose reassembled payload is itself a BATADV_UNICAST_FRAG packet (matryoshka-style nesting). Each nesting level recurses through batadv_batman_skb_recv() without bound, growing the kernel stack until it is exhausted.

Since refragmentation or fragments in fragments are not actually allowed, discard all packets which are still BATADV_UNICAST_FRAG packets after the defragmentation process.

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 (8)

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

batman-adv: frag: disallow unicast fragment in fragment - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/bcda4814dc6524283c0b958882cb963d75fe411d
generic

batman-adv: frag: disallow unicast fragment in fragment - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/bc62216dc8e221e3781afa14430f45208bfa9af9
generic

batman-adv: frag: disallow unicast fragment in fragment - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b54e459cf86943583c1aa2ee3081874e7ab1f5f3
generic

batman-adv: frag: disallow unicast fragment in fragment - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/aea54d0bbe156d5ab7d00d68f66149ff41f4612a
generic

batman-adv: frag: disallow unicast fragment in fragment - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7138c35c9ad39a2fca6264af6b87466471f04ffc
generic

batman-adv: frag: disallow unicast fragment in fragment - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5895ad21c7059a652da83fb817510f7a1e962abf
generic

batman-adv: frag: disallow unicast fragment in fragment - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5418be6c2e117bf8a316582795a8e3ff90f45e5d
generic

batman-adv: frag: disallow unicast fragment in fragment - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0c208fa3859e3a33a1c38bebc41d021166e94ac8

Vendor Advisories for CVE-2026-52916(2)

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

Patch Availability(19)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-08-30ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-30ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-08-30ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-08-30ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-08-30ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-08-30ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-08-30ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-08-30ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-30ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-08-30ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-08-30ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-08-30ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-08-30ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1117.102) @ jammy2026-08-30ubuntu
ubuntulinux-tools-intel-iotg-edge (5.15.0.1107.113~20.04.1) @ focal2026-08-30ubuntu
ubuntulinux-tools-intel-iotg-5.15 (5.15.0.1107.106) @ jammy2026-08-30ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1112.122~20.04.1) @ focal2026-08-30ubuntu
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

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (54 versions)5.10.259-1—
linux-6.16.1.106-3~deb11u1 ... 6.1.174-1~deb11u1 (20 versions)6.1.176-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (53 versions)6.1.176-1—
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 ... 7.0.9-1~bpo13+1 (141 versions)7.0.12-1—

Additional Vendor Advisories

(19)

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 / 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 191 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. 2026-09-01 13:54 UTCEPSS rescore
  8. 2026-08-30 20:22 UTCEG score recompute
  9. 2026-08-30 20:22 UTCVendor advisory
  10. 2026-08-30 20:22 UTCGHSA enrichment
  11. 2026-08-30 19:17 UTCEPSS rescore
  12. 2026-08-30 01:22 UTCEPSS rescore
  13. 2026-08-28 21:41 UTCEPSS rescore
  14. 2026-08-28 04:56 UTCEG score recompute
  15. 2026-08-28 04:56 UTCVendor advisory
  16. 2026-08-28 04:56 UTCGHSA enrichment
  17. 2026-08-27 14:25 UTCEPSS rescore
  18. 2026-08-26 14:46 UTCEPSS rescore
  19. 2026-08-25 13:49 UTCEPSS rescore
  20. 2026-08-24 13:52 UTCEG score recompute
  21. 2026-08-24 13:52 UTCVendor advisory
  22. 2026-08-24 13:52 UTCGHSA enrichment
  23. 2026-08-23 11:39 UTCVendor advisory
  24. 2026-08-23 11:39 UTCGHSA enrichment
  25. 2026-08-22 13:38 UTCVendor advisory
Show 75 more
  1. 2026-08-22 13:38 UTCGHSA enrichment
  2. 2026-08-21 05:39 UTCEG score recompute
  3. 2026-08-21 05:39 UTCVendor advisory
  4. 2026-08-21 05:39 UTCGHSA enrichment
  5. 2026-08-20 22:55 UTCEPSS rescore
  6. 2026-08-20 07:40 UTCEG score recompute
  7. 2026-08-20 07:40 UTCVendor advisory
  8. 2026-08-20 07:40 UTCGHSA enrichment
  9. 2026-08-19 17:04 UTCEPSS rescore
  10. 2026-08-19 04:17 UTCEG score recompute
  11. 2026-08-19 04:17 UTCVendor advisory
  12. 2026-08-19 04:17 UTCGHSA enrichment
  13. 2026-08-18 13:48 UTCEPSS rescore
  14. 2026-08-17 17:01 UTCEG score recompute
  15. 2026-08-17 17:01 UTCVendor advisory
  16. 2026-08-17 17:01 UTCGHSA enrichment
  17. 2026-08-17 13:47 UTCEPSS rescore
  18. 2026-08-16 18:31 UTCEG score recompute
  19. 2026-08-16 18:31 UTCVendor advisory
  20. 2026-08-16 18:31 UTCGHSA enrichment
  21. 2026-08-16 14:56 UTCEPSS rescore
  22. 2026-08-16 02:14 UTCEPSS rescore
  23. 2026-08-15 19:22 UTCEG score recompute
  24. 2026-08-15 19:22 UTCVendor advisory
  25. 2026-08-15 19:22 UTCGHSA enrichment
  26. 2026-08-15 01:30 UTCEPSS rescore
  27. 2026-08-14 21:22 UTCVendor advisory
  28. 2026-08-14 21:22 UTCGHSA enrichment
  29. 2026-08-13 23:17 UTCEG score recompute
  30. 2026-08-13 23:17 UTCVendor advisory
  31. 2026-08-13 23:17 UTCGHSA enrichment
  32. 2026-08-13 22:00 UTCEPSS rescore
  33. 2026-08-13 01:17 UTCEG score recompute
  34. 2026-08-13 01:17 UTCVendor advisory
  35. 2026-08-13 01:17 UTCGHSA enrichment
  36. 2026-08-12 13:51 UTCEPSS rescore
  37. 2026-08-12 03:18 UTCEG score recompute
  38. 2026-08-12 03:18 UTCVendor advisory
  39. 2026-08-12 03:18 UTCGHSA enrichment
  40. 2026-08-11 05:18 UTCEG score recompute
  41. 2026-08-11 05:18 UTCVendor advisory
  42. 2026-08-11 05:18 UTCGHSA enrichment
  43. 2026-08-11 00:00 UTCEPSS rescore
  44. 2026-08-10 07:19 UTCEG score recompute
  45. 2026-08-10 07:19 UTCVendor advisory
  46. 2026-08-10 07:19 UTCGHSA enrichment
  47. 2026-08-09 13:46 UTCEPSS rescore
  48. 2026-08-09 09:20 UTCEG score recompute
  49. 2026-08-09 09:20 UTCVendor advisory
  50. 2026-08-09 09:20 UTCGHSA enrichment
  51. 2026-08-08 16:37 UTCEPSS rescore
  52. 2026-08-08 11:21 UTCEG score recompute
  53. 2026-08-08 11:21 UTCVendor advisory
  54. 2026-08-08 11:21 UTCGHSA enrichment
  55. 2026-08-07 13:21 UTCVendor advisory
  56. 2026-08-07 13:21 UTCGHSA enrichment
  57. 2026-08-06 15:23 UTCEG score recompute
  58. 2026-08-06 15:23 UTCVendor advisory
  59. 2026-08-06 15:22 UTCGHSA enrichment
  60. 2026-08-06 13:47 UTCEPSS rescore
  61. 2026-08-05 17:23 UTCVendor advisory
  62. 2026-08-05 17:23 UTCGHSA enrichment
  63. 2026-08-04 15:13 UTCEG score recompute
  64. 2026-08-04 15:13 UTCVendor advisory
  65. 2026-08-04 15:13 UTCGHSA enrichment
  66. 2026-08-04 15:10 UTCEPSS rescore
  67. 2026-08-04 10:39 UTCEPSS rescore
  68. 2026-08-03 16:30 UTCVendor advisory
  69. 2026-08-03 16:30 UTCGHSA enrichment
  70. 2026-08-02 18:31 UTCEG score recompute
  71. 2026-08-02 18:31 UTCVendor advisory
  72. 2026-08-02 18:31 UTCGHSA enrichment
  73. 2026-08-02 02:27 UTCEPSS rescore
  74. 2026-08-01 20:31 UTCEG score recompute
  75. 2026-08-01 20:31 UTCVendor advisory

Frequently asked(5)

What is CVE-2026-52916?
CVE-2026-52916 is a medium vulnerability published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: batman-adv: frag: disallow unicast fragment in fragment batadvfragskbbuffer() is called by batadvbatmanskbrecv() when a BATADVUNICASTFRAG packet is received. Once all fragments are collected and the packet is reassembled,…
When was CVE-2026-52916 disclosed?
CVE-2026-52916 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-2026-52916 actively exploited?
CVE-2026-52916 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 97.6% of all scored CVEs.
What is the CVSS score of CVE-2026-52916?
CVE-2026-52916 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-52916?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52916, 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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