CVE-2024-26689

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2024-04-03. NVD baseline CVSS 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.8Exploit: None knownExposed: 0

A fix is available — apply it.

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

ceph: prevent use-after-free in encode_cap_msg()

In fs/ceph/caps.c, in encode_cap_msg(), "use after free" error was caught by KASAN at this line - 'ceph_buffer_get(arg->xattr_buf);'. This implies before the refcount could be increment here, it was freed.

In same file, in "handle_cap_grant()" refcount is decremented by this line - 'ceph_buffer_put(ci->i_xattrs.blob);'. It appears that a race occurred and resource was freed by the latter line before the former line could increment it.

encode_cap_msg() is called by __send_cap() and __send_cap() is called by ceph_check_caps() after calling __prep_cap(). __prep_cap() is where arg->xattr_buf is assigned to ci->i_xattrs.blob. This is the spot where the refcount must be increased to prevent "use after free" error.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
35(Track)
EG Risk 35/100SSVC: 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
Severity78% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
50%
KEV
Not listed

Published

April 3, 2024

Last Modified

August 5, 2026

Advisory Details (6)

Auto-updated Aug 4, 2026
No patch confirmed yet.
generic

ceph: prevent use-after-free in encode_cap_msg() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ae20db45e482303a20e56f2db667a9d9c54ac7e7
generic

ceph: prevent use-after-free in encode_cap_msg() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8180d0c27b93a6eb60da1b08ea079e3926328214
generic

ceph: prevent use-after-free in encode_cap_msg() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/7958c1bf5b03c6f1f58e724dbdec93f8f60b96fc
generic

ceph: prevent use-after-free in encode_cap_msg() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/70e329b440762390258a6fe8c0de93c9fdd56c77
generic

ceph: prevent use-after-free in encode_cap_msg() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/f3f98d7d84b31828004545e29fd7262b9f444139
generic

ceph: prevent use-after-free in encode_cap_msg() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/cda4672da1c26835dcbd7aec2bfed954eda9b5ef

Patch Availability(31)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-20.04-edge (5.15.0.106.106) @ jammy2026-05-24ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1054.52) @ jammy2026-05-24ubuntu
ubuntulinux-tools-aws-lts-22.04 (5.15.0.1061.61) @ jammy2026-05-24ubuntu
ubuntulinux-tools-intel-iotg (5.15.0.1057.57) @ jammy2026-05-24ubuntu
ubuntulinux-virtual-hwe-22.04 (6.5.0.44.44~22.04.1) @ jammy2026-05-24ubuntu
ubuntulinux-tools-starfive (6.5.0.1017.18~22.04.1) @ jammy2026-05-24ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.5.0.44.44) @ mantic2026-05-24ubuntu
ubuntulinux-tools-oem-22.04d (6.5.0.1027.29) @ jammy2026-05-24ubuntu
ubuntulinux-tools-gcp (6.5.0.1024.26~22.04.1) @ jammy2026-05-24ubuntu
ubuntulinux-tools-intel-iotg-edge (5.15.0.1058.64~20.04.1) @ focal2026-05-24ubuntu
ubuntulinux-virtual-hwe-18.04-edge (5.4.0.215.235~18.04.1) @ bionic2026-05-24ubuntu
ubuntulinux-tools-gcp-fips (5.4.0.1148.90) @ focal2026-05-24ubuntu
ubuntulinux-virtual-hwe-16.04-edge (4.15.0.237.249~16.04.1) @ xenial2026-05-24ubuntu
ubuntulinux-virtual-lts-xenial (4.4.0.268.274) @ xenial2026-05-24ubuntu
ubuntulinux-virtual (3.13.0.210.220) @ trusty2026-05-24ubuntu
ubuntulinux-tools-iot (5.4.0.1051.49) @ focal2026-05-24ubuntu
ubuntulinux-tools-fips (4.4.0.1113.114) @ xenial2026-05-24ubuntu
ubuntulinux-tools-azure (4.15.0.1188.203~14.04.1) @ trusty2026-05-24ubuntu
ubuntulinux-tools-azure-lts-20.04 (5.4.0.1150.144) @ focal2026-05-24ubuntu
ubuntulinux-tools-bluefield (5.4.0.1105.101) @ focal2026-05-24ubuntu
ubuntulinux-tools-azure-edge (4.15.0.1188.203~16.04.1) @ xenial2026-05-24ubuntu
ubuntulinux-tools-raspi-hwe-18.04-edge (5.4.0.1129.142~18.04.1) @ bionic2026-05-24ubuntu
ubuntulinux-tools-azure-fips (5.4.0.1151.88) @ focal2026-05-24ubuntu
ubuntulinux-virtual-lts-xenial (4.4.0.268.302~14.04.1) @ trusty2026-05-24ubuntu
ubuntulinux-tools-gcp-fips (4.15.0.2081.79) @ bionic2026-05-24ubuntu
ubuntuoracle (5.15.0-1055) @ jammy2026-05-24ubuntu
ubuntulinux-tools-azure-fips (4.15.0.2097.93) @ bionic2026-05-24ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.4.0-1064 (5.4.0-1064.68) @ focal2026-05-24ubuntu
ubuntulinux-tools-aws (4.4.0.1143.140) @ trusty2026-05-24ubuntu
ubuntulinux-tools-raspi2-hwe-18.04-edge (5.4.0.1129.160) @ focal2026-05-24ubuntu
linuxKernel @ 5.10.210—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.

Weakness Classification(1)

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

All Vendor Advisories

(25)

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 12× in last 7d / 46× 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 130 total refreshes for this CVE.

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

Related CVEs(same product + same vendor + same CWE)

Frequently asked(5)

What is CVE-2024-26689?
CVE-2024-26689 is a high vulnerability published on April 3, 2024. In the Linux kernel, the following vulnerability has been resolved: ceph: prevent use-after-free in encodecapmsg() In fs/ceph/caps.c, in encodecapmsg(), "use after free" error was caught by KASAN at this line - 'cephbufferget(arg->xattr_buf);'. This implies before the refcount could be increment…
When was CVE-2024-26689 disclosed?
CVE-2024-26689 was first published in the National Vulnerability Database on April 3, 2024, 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-2024-26689 actively exploited?
CVE-2024-26689 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 50.4% of all scored CVEs.
What is the CVSS score of CVE-2024-26689?
CVE-2024-26689 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2024-26689?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-26689, 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.

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