CVE-2026-52954

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-24. a secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 1%CVSS: 7.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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

libceph: handle rbtree insertion error in decode_choose_args()

A message of type CEPH_MSG_OSD_MAP contains an OSD map that itself contains a CRUSH map. The received CRUSH map may optionally contain choose_args that get decoded in decode_choose_args(). In this function, num_choose_arg_maps is read from the message, and a corresponding number of crush_choose_arg_maps gets decoded afterwards. Each crush_choose_arg_map has a choose_args_index, which serves as the key when inserting it into the choose_args rbtree of the decoded crush_map. If a (potentially corrupted) message contains two crush_choose_arg_maps with the same index, the assertion in insert_choose_arg_map() triggers a kernel BUG when trying to insert the second crush_choose_arg_map.

This patch fixes the issue by switching to the non-asserting rbtree insertion function and rejecting the message if the insertion fails.

[ idryomov: changelog ]

CVSS v3
7.5
EG Score
7.5(high)
EPSS
40.9%
KEV
Not listed

Published

June 24, 2026

Last Modified

June 29, 2026

Advisory Details (8)

Auto-updated Jun 28, 2026
No patch confirmed yet.
generic

libceph: handle rbtree insertion error in decode_choose_args() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f47430fc1f815e87406e2d3b4e476eff1bc7fd9b
generic

libceph: handle rbtree insertion error in decode_choose_args() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d289478cfc0bcf81c7914200d6abdcb78bd04ded
generic

libceph: handle rbtree insertion error in decode_choose_args() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c7bf7864e2924fa5508ac270b0e9364bc13d5a6c
generic

libceph: handle rbtree insertion error in decode_choose_args() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/80c73bd1b2b04355d1d0c29be8ccbd25a380905d
generic

libceph: handle rbtree insertion error in decode_choose_args() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/534ebc08df97c47d4c7596f336fa31ecbf91519c
generic

libceph: handle rbtree insertion error in decode_choose_args() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4d2b37abda9536808655830d683dc491d31741a8
generic

libceph: handle rbtree insertion error in decode_choose_args() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0b6a3bcb91bc5bfeda39f0df3b71bab62c13e9da
generic

libceph: handle rbtree insertion error in decode_choose_args() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0a1265a9ab875f92b6a3ffb497404f46cf9d76a3

Vendor Advisories for CVE-2026-52954(2)

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

Data Freshness Timeline

(refreshed 38× in last 7d / 52× 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.

  1. 2026-07-07 01:19 UTCEG score recompute
  2. 2026-07-07 01:19 UTCGHSA enrichment
  3. 2026-07-06 16:27 UTCEPSS rescore
  4. 2026-07-06 16:27 UTCEPSS rescore
  5. 2026-07-06 14:26 UTCEG score recompute
  6. 2026-07-06 14:26 UTCGHSA enrichment
  7. 2026-07-06 03:31 UTCEG score recompute
  8. 2026-07-06 03:31 UTCGHSA enrichment
  9. 2026-07-06 02:23 UTCEPSS rescore
  10. 2026-07-06 02:23 UTCEPSS rescore
  11. 2026-07-05 16:32 UTCEG score recompute
  12. 2026-07-05 16:32 UTCGHSA enrichment
  13. 2026-07-05 05:36 UTCEG score recompute
  14. 2026-07-05 05:36 UTCGHSA enrichment
  15. 2026-07-05 02:30 UTCEPSS rescore
  16. 2026-07-04 18:40 UTCEG score recompute
  17. 2026-07-04 18:40 UTCGHSA enrichment
  18. 2026-07-04 07:47 UTCEG score recompute
  19. 2026-07-04 07:47 UTCGHSA enrichment
  20. 2026-07-04 06:31 UTCEPSS rescore
  21. 2026-07-03 20:52 UTCEG score recompute
  22. 2026-07-03 20:52 UTCGHSA enrichment
  23. 2026-07-03 09:59 UTCEG score recompute
  24. 2026-07-03 09:59 UTCGHSA enrichment
  25. 2026-07-02 23:03 UTCEG score recompute
Show 27 more
  1. 2026-07-02 23:03 UTCGHSA enrichment
  2. 2026-07-02 12:09 UTCEG score recompute
  3. 2026-07-02 12:09 UTCGHSA enrichment
  4. 2026-07-02 01:14 UTCEG score recompute
  5. 2026-07-02 01:14 UTCGHSA enrichment
  6. 2026-07-01 15:07 UTCEPSS rescore
  7. 2026-07-01 14:21 UTCEG score recompute
  8. 2026-07-01 14:21 UTCGHSA enrichment
  9. 2026-07-01 03:28 UTCEG score recompute
  10. 2026-07-01 03:28 UTCGHSA enrichment
  11. 2026-06-30 23:22 UTCEPSS rescore
  12. 2026-06-30 16:35 UTCEG score recompute
  13. 2026-06-30 16:35 UTCGHSA enrichment
  14. 2026-06-30 05:41 UTCEG score recompute▲ 7.50
  15. 2026-06-30 05:40 UTCGHSA enrichment
  16. 2026-06-29 14:06 UTCEPSS rescore
  17. 2026-06-29 14:06 UTCEPSS rescore
  18. 2026-06-28 14:07 UTCEPSS rescore
  19. 2026-06-28 07:52 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  20. 2026-06-28 04:56 UTCEPSS rescore
  21. 2026-06-28 04:56 UTCEPSS rescore
  22. 2026-06-27 12:06 UTCEG score recompute
  23. 2026-06-27 12:05 UTCGHSA enrichment
  24. 2026-06-27 03:08 UTCEPSS rescore
  25. 2026-06-25 13:49 UTCEPSS rescore
  26. 2026-06-24 18:30 UTCEG score recompute
  27. 2026-06-24 18:02 UTCNVD updatefirst tracked

Frequently asked(5)

What is CVE-2026-52954?
CVE-2026-52954 is a high vulnerability published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: libceph: handle rbtree insertion error in decodechooseargs() A message of type CEPHMSGOSD_MAP contains an OSD map that itself contains a CRUSH map. The received CRUSH map may optionally contain chooseargs that get decoded in…
When was CVE-2026-52954 disclosed?
CVE-2026-52954 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on June 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52954 actively exploited?
CVE-2026-52954 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 40.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-52954?
CVE-2026-52954 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-52954?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52954, 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

Explore the affected products and dependency analysis for CVE-2026-52954

Explore →

Is Your Infrastructure Affected by CVE-2026-52954?

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

Start Free Scan →Browse All CVEs