CVE-2025-68261

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2025-12-16. the CNA's CVSS baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

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

ext4: add i_data_sem protection in ext4_destroy_inline_data_nolock()

Fix a race between inline data destruction and block mapping.

The function ext4_destroy_inline_data_nolock() changes the inode data layout by clearing EXT4_INODE_INLINE_DATA and setting EXT4_INODE_EXTENTS. At the same time, another thread may execute ext4_map_blocks(), which tests EXT4_INODE_EXTENTS to decide whether to call ext4_ext_map_blocks() or ext4_ind_map_blocks().

Without i_data_sem protection, ext4_ind_map_blocks() may receive inode with EXT4_INODE_EXTENTS flag and triggering assert.

kernel BUG at fs/ext4/indirect.c:546! EXT4-fs (loop2): unmounting filesystem. invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:ext4_ind_map_blocks.cold+0x2b/0x5a fs/ext4/indirect.c:546

Call Trace: ext4_map_blocks+0xb9b/0x16f0 fs/ext4/inode.c:681 _ext4_get_block+0x242/0x590 fs/ext4/inode.c:822 ext4_block_write_begin+0x48b/0x12c0 fs/ext4/inode.c:1124 ext4_write_begin+0x598/0xef0 fs/ext4/inode.c:1255 ext4_da_write_begin+0x21e/0x9c0 fs/ext4/inode.c:3000 generic_perform_write+0x259/0x5d0 mm/filemap.c:3846 ext4_buffered_write_iter+0x15b/0x470 fs/ext4/file.c:285 ext4_file_write_iter+0x8e0/0x17f0 fs/ext4/file.c:679 call_write_iter include/linux/fs.h:2271 [inline] do_iter_readv_writev+0x212/0x3c0 fs/read_write.c:735 do_iter_write+0x186/0x710 fs/read_write.c:861 vfs_iter_write+0x70/0xa0 fs/read_write.c:902 iter_file_splice_write+0x73b/0xc90 fs/splice.c:685 do_splice_from fs/splice.c:763 [inline] direct_splice_actor+0x10f/0x170 fs/splice.c:950 splice_direct_to_actor+0x33a/0xa10 fs/splice.c:896 do_splice_direct+0x1a9/0x280 fs/splice.c:1002 do_sendfile+0xb13/0x12c0 fs/read_write.c:1255 __do_sys_sendfile64 fs/read_write.c:1323 [inline] __se_sys_sendfile64 fs/read_write.c:1309 [inline] __x64_sys_sendfile64+0x1cf/0x210 fs/read_write.c:1309 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x35/0x80 arch/x86/entry/common.c:81 entry_SYSCALL_64_after_hwframe+0x6e/0xd8

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
34(Track)
EG Risk 34/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
44%
KEV
Not listed

Published

December 16, 2025

Last Modified

September 8, 2026

Advisory Details (9)

Auto-updated Jul 31, 2026
No patch confirmed yet.
generic

SSA-019113

https://cert-portal.siemens.com/productcert/html/ssa-019113.html
generic

ext4: add i_data_sem protection in ext4_destroy_inline_data_nolock() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ba8aeff294ac7ff6dfe293663d815c54c5ee218c
generic

ext4: add i_data_sem protection in ext4_destroy_inline_data_nolock() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/b322bac9f01d03190b5abc52be5d9dd9f22a2b41
generic

ext4: add i_data_sem protection in ext4_destroy_inline_data_nolock() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/61e03dc3794ebf77a706b85e5a36c9c6d70be6de
generic

ext4: add i_data_sem protection in ext4_destroy_inline_data_nolock() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5cad18e527ba8a9ca5463cc170073eeb5a4826f4
generic

ext4: add i_data_sem protection in ext4_destroy_inline_data_nolock() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5b266cf6851ce72b11b067fe02adf5a8687104ad
generic

ext4: add i_data_sem protection in ext4_destroy_inline_data_nolock() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/22a76b0861ae61a299c8e126c1aca8c4fda820fd
generic

ext4: add i_data_sem protection in ext4_destroy_inline_data_nolock() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/144c48da33a01d92995aeccd8208eb47d2a8e659
generic

ext4: add i_data_sem protection in ext4_destroy_inline_data_nolock() - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0cd8feea8777f8d9b9a862b89c688b049a5c8475

Vendor Advisories for CVE-2025-68261(1)

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

Patch Availability(31)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1054.60) @ noble2026-09-08ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1029.30) @ noble2026-09-08ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1054.60+fips1) @ noble2026-09-08ubuntu
ubuntulinux-tools-nvidia-tegra-rt-6.8 (6.8.0-1022.22) @ noble2026-09-08ubuntu
ubuntulinux-virtual-hwe-24.04-edge (6.17.0-19.19) @ questing2026-09-08ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1067 (5.15.0-1067.71) @ jammy2026-09-08ubuntu
ubuntulinux-tools-azure-edge (6.8.0-1059.65~22.04.1) @ jammy2026-09-08ubuntu
ubuntulinux-tools-raspi-6.17 (6.17.0-1010.10) @ questing2026-09-08ubuntu
ubuntulinux-tools-gcp-fips-5.15 (5.15.0.1103.93) @ jammy2026-09-08ubuntu
ubuntulinux-tools-gcp-edge (6.17.0-1009.9~24.04.3) @ noble2026-09-08ubuntu
ubuntulinux-tools-gke-5.15 (5.15.0.1099.98) @ jammy2026-09-08ubuntu
ubuntulinux-tools-realtime-5.15 (5.15.0.1102.106) @ jammy2026-09-08ubuntu
ubuntulinux-tools-intel-iot-realtime-5.15 (5.15.0.1094.98) @ jammy2026-09-08ubuntu
ubuntulinux-tools-nvidia-tegra-igx-rt-5.15 (5.15.0.1044.46) @ jammy2026-09-08ubuntu
ubuntulinux-tools-realtime-hwe-24.04-edge (6.17.0-1008.9~24.04.1) @ noble2026-09-08ubuntu
ubuntulinux-tools-azure-edge (6.17.0-1010.10~24.04.1) @ noble2026-09-08ubuntu
ubuntulinux-tools-raspi-nolpae (5.15.0.1097.95) @ jammy2026-09-08ubuntu
ubuntulinux-tools-oem-6.17 (6.17.0-1017.17) @ noble2026-09-08ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1109.94) @ jammy2026-09-08ubuntu
ubuntulinux-tools-azure-lts-22.04 (5.15.0.1109.107) @ jammy2026-09-08ubuntu
ubuntulinux-virtual-6.8 (6.8.0-110.110) @ noble2026-09-08ubuntu
ubuntulinux-tools-realtime-6.8.1 (6.8.1-1047.48) @ noble2026-09-08ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1054.57+fips1) @ noble2026-09-08ubuntu
ubuntulinux-tools-nvidia-64k-6.8 (6.8.0-1051.54) @ noble2026-09-08ubuntu
ubuntulinux-tools-raspi-6.8 (6.8.0-1052.56) @ noble2026-09-08ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1049.50) @ noble2026-09-08ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2042.43) @ noble2026-09-08ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1051.54.1) @ noble2026-09-08ubuntu
ubuntulinux-tools-gcp-edge (6.8.0-1054.57~22.04.1) @ jammy2026-09-08ubuntu
ubuntulinux-tools-azure-edge (5.15.0.1110.119~20.04.1) @ focal2026-09-08ubuntu
linuxKernel @ 5.10.248—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.

Affected Packages

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (48 versions)5.10.249-1—
linux-6.16.1.106-3~deb11u1 ... 6.1.159-1~deb11u1 (14 versions)6.1.162-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (46 versions)6.1.162-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.63-1~bpo12+1 (8 versions)6.12.63-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 6.17.9-1 (83 versions)6.17.12-1—

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 5× in last 7d / 28× 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 194 total refreshes for this CVE.

  1. 2026-09-20 20:15 UTCEPSS rescore
  2. 2026-09-18 19:27 UTCEPSS rescore
  3. 2026-09-17 19:30 UTCEPSS rescore
  4. 2026-09-16 14:07 UTCEPSS rescore
  5. 2026-09-16 05:14 UTCEPSS rescore
  6. 2026-09-15 03:10 UTCEPSS rescore
  7. 2026-09-13 16:46 UTCEPSS rescore
  8. 2026-09-12 15:00 UTCEPSS rescore
  9. 2026-09-11 14:52 UTCEPSS rescore
  10. 2026-09-11 09:36 UTCEPSS rescore
  11. 2026-09-10 09:34 UTCEPSS rescore
  12. 2026-09-08 22:00 UTCEPSS rescore
  13. 2026-09-08 09:47 UTCEG score recompute
  14. 2026-09-08 09:47 UTCVendor advisory
  15. 2026-09-08 09:46 UTCGHSA enrichment
  16. 2026-09-08 09:32 UTCGHSA enrichment
  17. 2026-09-07 16:00 UTCEPSS rescore
  18. 2026-09-06 13:47 UTCEPSS rescore
  19. 2026-09-04 05:06 UTCEPSS rescore
  20. 2026-09-02 14:11 UTCEPSS rescore
  21. 2026-09-01 13:53 UTCEPSS rescore
  22. 2026-08-30 01:21 UTCEPSS rescore
  23. 2026-08-28 21:40 UTCEPSS rescore
  24. 2026-08-27 14:24 UTCEPSS rescore
  25. 2026-08-26 14:45 UTCEPSS rescore
Show 75 more
  1. 2026-08-26 09:13 UTCOSV refresh
  2. 2026-08-25 13:48 UTCEPSS rescore
  3. 2026-08-24 14:16 UTCEPSS rescore
  4. 2026-08-23 00:18 UTCEPSS rescore
  5. 2026-08-21 23:48 UTCEPSS rescore
  6. 2026-08-20 22:55 UTCEPSS rescore
  7. 2026-08-19 17:03 UTCEPSS rescore
  8. 2026-08-18 13:48 UTCEPSS rescore
  9. 2026-08-17 13:46 UTCEPSS rescore
  10. 2026-08-16 14:55 UTCEPSS rescore
  11. 2026-08-16 02:14 UTCEPSS rescore
  12. 2026-08-15 01:30 UTCEPSS rescore
  13. 2026-08-13 22:00 UTCEPSS rescore
  14. 2026-08-12 13:50 UTCEPSS rescore
  15. 2026-08-11 13:42 UTCEPSS rescore
  16. 2026-08-10 23:59 UTCEPSS rescore
  17. 2026-08-09 23:36 UTCEG score recompute
  18. 2026-08-09 23:36 UTCVendor advisory
  19. 2026-08-09 23:36 UTCGHSA enrichment
  20. 2026-08-09 13:46 UTCEPSS rescore
  21. 2026-08-08 16:36 UTCEPSS rescore
  22. 2026-08-08 06:22 UTCEG score recompute
  23. 2026-08-08 06:22 UTCVendor advisory
  24. 2026-08-08 06:22 UTCGHSA enrichment
  25. 2026-08-07 16:27 UTCEPSS rescore
  26. 2026-08-06 13:46 UTCEPSS rescore
  27. 2026-08-06 08:57 UTCEG score recompute
  28. 2026-08-06 08:57 UTCVendor advisory
  29. 2026-08-06 08:57 UTCGHSA enrichment
  30. 2026-08-05 19:17 UTCEPSS rescore
  31. 2026-08-05 12:49 UTCEG score recompute
  32. 2026-08-05 12:49 UTCVendor advisory
  33. 2026-08-05 12:48 UTCGHSA enrichment
  34. 2026-08-04 10:37 UTCEPSS rescore
  35. 2026-08-03 10:35 UTCEPSS rescore
  36. 2026-08-02 02:26 UTCEPSS rescore
  37. 2026-08-01 04:15 UTCEPSS rescore
  38. 2026-07-30 16:27 UTCEPSS rescore
  39. 2026-07-30 06:48 UTCEG score recompute
  40. 2026-07-30 06:48 UTCVendor advisory
  41. 2026-07-30 06:48 UTCGHSA enrichment
  42. 2026-07-30 06:21 UTCEG score recompute▲ 7.50
  43. 2026-07-30 06:21 UTCVendor advisory
  44. 2026-07-30 06:21 UTCGHSA enrichment
  45. 2026-07-30 06:18 UTCMITRE cvelistV5CVSS v3 → 7.5 · severity → HIGH
  46. 2026-07-30 01:30 UTCEPSS rescore
  47. 2026-07-27 14:13 UTCEPSS rescore
  48. 2026-07-27 04:39 UTCOSV refresh
  49. 2026-07-26 14:54 UTCEPSS rescore
  50. 2026-07-26 14:54 UTCEPSS rescore
  51. 2026-07-25 14:17 UTCEPSS rescore
  52. 2026-07-25 14:17 UTCEPSS rescore
  53. 2026-07-24 14:17 UTCEPSS rescore
  54. 2026-07-23 14:18 UTCEPSS rescore
  55. 2026-07-23 14:18 UTCEPSS rescore
  56. 2026-07-23 03:02 UTCEG score recompute
  57. 2026-07-22 14:08 UTCEPSS rescore
  58. 2026-07-21 15:24 UTCEPSS rescore
  59. 2026-07-20 17:08 UTCEPSS rescore
  60. 2026-07-19 14:30 UTCEPSS rescore
  61. 2026-07-19 14:30 UTCEPSS rescore
  62. 2026-07-19 02:28 UTCEPSS rescore
  63. 2026-07-19 02:28 UTCEPSS rescore
  64. 2026-07-18 10:04 UTCEPSS rescore
  65. 2026-07-18 10:04 UTCEPSS rescore
  66. 2026-07-16 17:02 UTCEPSS rescore
  67. 2026-07-16 17:02 UTCEPSS rescore
  68. 2026-07-15 16:57 UTCEPSS rescore
  69. 2026-07-15 16:57 UTCEPSS rescore
  70. 2026-07-15 02:00 UTCEPSS rescore
  71. 2026-07-15 01:59 UTCEPSS rescore
  72. 2026-07-14 13:19 UTCNVD update
  73. 2026-07-13 06:12 UTCEPSS rescore
  74. 2026-07-12 05:46 UTCEPSS rescore
  75. 2026-07-12 05:46 UTCEPSS rescore

Related CVEs(same product + same vendor)

Frequently asked(5)

What is CVE-2025-68261?
CVE-2025-68261 is a high vulnerability published on December 16, 2025. In the Linux kernel, the following vulnerability has been resolved: ext4: add idatasem protection in ext4destroyinlinedatanolock() Fix a race between inline data destruction and block mapping. The function ext4destroyinlinedatanolock() changes the inode data layout by clearing EXT4INODEINLINEDATA…
When was CVE-2025-68261 disclosed?
CVE-2025-68261 was first published in the National Vulnerability Database on December 16, 2025, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2025-68261 actively exploited?
CVE-2025-68261 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 56.0% of all scored CVEs.
What is the CVSS score of CVE-2025-68261?
CVE-2025-68261 has a CVSS v4.0 base score of 7.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2025-68261?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-68261, 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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