CVE-2026-52958

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-24. the CNA's CVSS baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.1Exploit: None knownExposed: 0

A fix is available — apply it.

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

libceph: Fix potential out-of-bounds access in osdmap_decode()

When decoding osd_state and osd_weight from an incoming osdmap in osdmap_decode(), both are decoded for each osd, i.e., map->max_osd times. The ceph_decode_need() check only accounts for sizeof(*map->osd_weight) once. This can potentially result in an out-of-bounds memory access if the incoming message is corrupted such that the max_osd value exceeds the actual content of the osdmap message.

This patch fixes the issue by changing the corresponding part in the ceph_decode_need() check to account for map->max_osd*sizeof(*map->osd_weight).

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
46(Track)
EG Risk 46/100SSVC: 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
Severity91% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
44%
KEV
Not listed

Published

June 24, 2026

Last Modified

August 5, 2026

Advisory Details (8)

Auto-updated Sep 7, 2026
No patch confirmed yet.
generic

libceph: Fix potential out-of-bounds access in osdmap_decode() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/35d0ed82d03e5ee77ea4f31f20e29562a7721649
generic

libceph: Fix potential out-of-bounds access in osdmap_decode() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ee933694645dac062d65fc2743f92bc06fa0db6b
generic

libceph: Fix potential out-of-bounds access in osdmap_decode() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/48df98d12b15360cd56af5c1f460307b340c1197
generic

libceph: Fix potential out-of-bounds access in osdmap_decode() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e7187f33c02488697ec0d01d82bf7a3f8deaba8f
generic

libceph: Fix potential out-of-bounds access in osdmap_decode() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0d2dd7e6bb74fd7712aa73457a4a821906c6863a
generic

libceph: Fix potential out-of-bounds access in osdmap_decode() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8713bbc4b2b9ad78f803978e54b7e49dd21bd9be
generic

libceph: Fix potential out-of-bounds access in osdmap_decode() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3f2575bb7f955d42569d96c3e04fa958a0dcf4b4
generic

libceph: Fix potential out-of-bounds access in osdmap_decode() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/36a79759a288961b1ff28a68ec2d1f56f6848098

Vendor Advisories for CVE-2026-52958(2)

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

Patch Availability(30)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-31ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-08-31ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-08-31ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-08-31ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-08-31ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-08-31ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-08-31ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-08-31ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-08-31ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1033.34) @ noble2026-08-31ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-08-31ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-08-31ubuntu
ubuntulinux-tools-intel-iotg-edge (5.15.0.1107.113~20.04.1) @ focal2026-08-31ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.4.0-1080 (5.4.0-1080.84) @ focal2026-08-31ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-08-31ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-08-31ubuntu
ubuntulinux-tools-kvm-5.4 (5.4.0.1149.145) @ focal2026-08-31ubuntu
ubuntulinux-tools-azure-fips-5.4 (5.4.0.1167.103) @ focal2026-08-31ubuntu
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-08-31ubuntu
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-08-31ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-08-31ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-08-31ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-08-31ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-08-31ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1058.61) @ noble2026-08-31ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-08-31ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-08-31ubuntu
ubuntulinux-tools-nvidia-lowlatency-5.15 (5.15.0.1107.107) @ jammy2026-08-31ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-08-31ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-31ubuntu

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 (140 versions)7.0.10-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(24)

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 / 147× 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 521 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. 2026-08-31 00:45 UTCVendor advisory
  11. 2026-08-31 00:44 UTCGHSA enrichment
  12. 2026-08-30 20:19 UTCEG score recompute
  13. 2026-08-30 20:19 UTCVendor advisory
  14. 2026-08-30 20:19 UTCGHSA enrichment
  15. 2026-08-30 19:17 UTCEPSS rescore
  16. 2026-08-30 01:22 UTCEPSS rescore
  17. 2026-08-28 21:41 UTCEPSS rescore
  18. 2026-08-28 04:49 UTCEG score recompute
  19. 2026-08-28 04:49 UTCVendor advisory
  20. 2026-08-28 04:49 UTCGHSA enrichment
  21. 2026-08-27 14:25 UTCEPSS rescore
  22. 2026-08-26 14:46 UTCEPSS rescore
  23. 2026-08-25 13:49 UTCEPSS rescore
  24. 2026-08-25 06:51 UTCVendor advisory
  25. 2026-08-25 06:51 UTCGHSA enrichment
Show 75 more
  1. 2026-08-25 02:26 UTCVendor advisory
  2. 2026-08-25 02:25 UTCGHSA enrichment
  3. 2026-08-24 22:01 UTCEG score recompute
  4. 2026-08-24 22:01 UTCVendor advisory
  5. 2026-08-24 22:01 UTCGHSA enrichment
  6. 2026-08-24 13:46 UTCEG score recompute
  7. 2026-08-24 13:46 UTCVendor advisory
  8. 2026-08-24 13:46 UTCGHSA enrichment
  9. 2026-08-24 06:48 UTCVendor advisory
  10. 2026-08-24 06:47 UTCGHSA enrichment
  11. 2026-08-24 01:38 UTCVendor advisory
  12. 2026-08-24 01:37 UTCGHSA enrichment
  13. 2026-08-23 21:09 UTCVendor advisory
  14. 2026-08-23 21:09 UTCGHSA enrichment
  15. 2026-08-23 16:44 UTCVendor advisory
  16. 2026-08-23 16:44 UTCGHSA enrichment
  17. 2026-08-23 12:19 UTCVendor advisory
  18. 2026-08-23 12:18 UTCGHSA enrichment
  19. 2026-08-23 07:52 UTCVendor advisory
  20. 2026-08-23 07:51 UTCGHSA enrichment
  21. 2026-08-23 03:20 UTCEG score recompute
  22. 2026-08-23 03:20 UTCVendor advisory
  23. 2026-08-23 03:19 UTCGHSA enrichment
  24. 2026-08-23 00:19 UTCEPSS rescore
  25. 2026-08-22 22:43 UTCVendor advisory
  26. 2026-08-22 22:42 UTCGHSA enrichment
  27. 2026-08-22 13:10 UTCEG score recompute
  28. 2026-08-22 13:10 UTCVendor advisory
  29. 2026-08-22 13:09 UTCGHSA enrichment
  30. 2026-08-21 23:49 UTCEPSS rescore
  31. 2026-08-21 22:00 UTCVendor advisory
  32. 2026-08-21 21:59 UTCGHSA enrichment
  33. 2026-08-21 17:30 UTCVendor advisory
  34. 2026-08-21 17:29 UTCGHSA enrichment
  35. 2026-08-21 11:52 UTCVendor advisory
  36. 2026-08-21 11:51 UTCGHSA enrichment
  37. 2026-08-21 06:32 UTCVendor advisory
  38. 2026-08-21 06:32 UTCGHSA enrichment
  39. 2026-08-21 02:08 UTCEG score recompute
  40. 2026-08-21 02:08 UTCVendor advisory
  41. 2026-08-21 02:08 UTCGHSA enrichment
  42. 2026-08-20 22:55 UTCEPSS rescore
  43. 2026-08-20 21:23 UTCVendor advisory
  44. 2026-08-20 21:22 UTCGHSA enrichment
  45. 2026-08-20 16:57 UTCVendor advisory
  46. 2026-08-20 16:57 UTCGHSA enrichment
  47. 2026-08-20 12:22 UTCVendor advisory
  48. 2026-08-20 12:21 UTCGHSA enrichment
  49. 2026-08-20 07:34 UTCEG score recompute
  50. 2026-08-20 07:34 UTCVendor advisory
  51. 2026-08-20 07:33 UTCGHSA enrichment
  52. 2026-08-19 17:04 UTCEPSS rescore
  53. 2026-08-19 12:42 UTCVendor advisory
  54. 2026-08-19 12:42 UTCGHSA enrichment
  55. 2026-08-19 06:59 UTCVendor advisory
  56. 2026-08-19 06:58 UTCGHSA enrichment
  57. 2026-08-19 02:16 UTCEG score recompute
  58. 2026-08-19 02:16 UTCVendor advisory
  59. 2026-08-19 02:15 UTCGHSA enrichment
  60. 2026-08-18 13:48 UTCEPSS rescore
  61. 2026-08-17 15:26 UTCEG score recompute
  62. 2026-08-17 15:26 UTCVendor advisory
  63. 2026-08-17 15:26 UTCGHSA enrichment
  64. 2026-08-17 13:47 UTCEPSS rescore
  65. 2026-08-17 11:02 UTCVendor advisory
  66. 2026-08-17 11:01 UTCGHSA enrichment
  67. 2026-08-17 06:37 UTCVendor advisory
  68. 2026-08-17 06:37 UTCGHSA enrichment
  69. 2026-08-17 01:56 UTCVendor advisory
  70. 2026-08-17 01:56 UTCGHSA enrichment
  71. 2026-08-16 21:32 UTCVendor advisory
  72. 2026-08-16 21:32 UTCGHSA enrichment
  73. 2026-08-16 17:08 UTCEG score recompute
  74. 2026-08-16 17:08 UTCVendor advisory
  75. 2026-08-16 17:08 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-52958?
CVE-2026-52958 is a critical vulnerability published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: libceph: Fix potential out-of-bounds access in osdmap_decode() When decoding osdstate and osdweight from an incoming osdmap in osdmapdecode(), both are decoded for each osd, i.e., map->maxosd times. The cephdecodeneed() check only…
When was CVE-2026-52958 disclosed?
CVE-2026-52958 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52958 actively exploited?
CVE-2026-52958 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 56.4% of all scored CVEs.
What is the CVSS score of CVE-2026-52958?
CVE-2026-52958 has a CVSS v4.0 base score of 9.1 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-52958?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52958, 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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