CVE-2025-40147

UNRATEDCVSS · not yet scored

Also known asEUVD-2025-124936 (ENISA EUVD) · GHSA-j92p-7382-5wph (GitHub Security Advisories)Source: ENISA EUVD

—
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS v2: —Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

blk-throttle: fix access race during throttle policy activation

On repeated cold boots we occasionally hit a NULL pointer crash in blk_should_throtl() when throttling is consulted before the throttle policy is fully enabled for the queue. Checking only q->td != NULL is insufficient during early initialization, so blkg_to_pd() for the throttle policy can still return NULL and blkg_to_tg() becomes NULL, which later gets dereferenced.

Unable to handle kernel NULL pointer dereference at virtual address 0000000000000156 ... pc : submit_bio_noacct+0x14c/0x4c8 lr : submit_bio_noacct+0x48/0x4c8 sp : ffff800087f0b690 x29: ffff800087f0b690 x28: 0000000000005f90 x27: ffff00068af393c0 x26: 0000000000080000 x25: 000000000002fbc0 x24: ffff000684ddcc70 x23: 0000000000000000 x22: 0000000000000000 x21: 0000000000000000 x20: 0000000000080000 x19: ffff000684ddcd08 x18: ffffffffffffffff x17: 0000000000000000 x16: ffff80008132a550 x15: 0000ffff98020fff x14: 0000000000000000 x13: 1fffe000d11d7021 x12: ffff000688eb810c x11: ffff00077ec4bb80 x10: ffff000688dcb720 x9 : ffff80008068ef60 x8 : 00000a6fb8a86e85 x7 : 000000000000111e x6 : 0000000000000002 x5 : 0000000000000246 x4 : 0000000000015cff x3 : 0000000000394500 x2 : ffff000682e35e40 x1 : 0000000000364940 x0 : 000000000000001a Call trace: submit_bio_noacct+0x14c/0x4c8 verity_map+0x178/0x2c8 __map_bio+0x228/0x250 dm_submit_bio+0x1c4/0x678 __submit_bio+0x170/0x230 submit_bio_noacct_nocheck+0x16c/0x388 submit_bio_noacct+0x16c/0x4c8 submit_bio+0xb4/0x210 f2fs_submit_read_bio+0x4c/0xf0 f2fs_mpage_readpages+0x3b0/0x5f0 f2fs_readahead+0x90/0xe8

Tighten blk_throtl_activated() to also require that the throttle policy bit is set on the queue:

return q->td != NULL && test_bit(blkcg_policy_throtl.plid, q->blkcg_pols);

This prevents blk_should_throtl() from accessing throttle group state until policy data has been attached to blkgs.

CVSS v3
—
EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
—
EG Risk
—
EPSS PROB
0.3%
EPSS %ILE
17th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

EG Severity
Not assessed: no CVSS publishedA missing CVSS is not a severity of zero.
EG Likelihood
0.3% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
No SSVC decision: EchelonGraph has not assessed this CVECISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the BOD 26-04 block below.

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

November 12, 2025

Last Modified

October 19, 2026

References (3)

Patch Availability(6)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-virtual-hwe-24.04-edge (6.17.0-14.14) @ questing2026-05-21ubuntu
ubuntulinux-tools-oracle-64k-6.17 (6.17.0-1007.7) @ questing2026-05-21ubuntu
ubuntulinux-tools-oem-6.17 (6.17.0-1011.11) @ noble2026-05-21ubuntu
ubuntulinux-tools-gcp-64k-6.17 (6.17.0-1007.7) @ questing2026-05-21ubuntu
ubuntulinux-tools-azure-6.17 (6.17.0-1008.8) @ questing2026-05-21ubuntu
linuxKernel @ 6.12.78 (fixes >=6.10.0)—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

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.38-1 ... 6.12.85-1~bpo12+1 (17 versions)
  • every version up to 6.12.85-1: fixed in 6.12.85-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.17.5-1~exp1 (75 versions)
  • every version up to 6.17.6-1: fixed in 6.17.6-1
—

All Vendor Advisories

(5)

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 6× in last 7d / 39× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 98 of 227 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 2 repeat rows among the latest 100 are merged into the row they repeat. The 129 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-05 16:35 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  2. 2026-11-04 16:33 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  3. 2026-11-03 16:44 UTCEPSS rescoreEPSS 0.3% · 17th percentile
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  6. 2026-10-31 16:31 UTCEPSS rescoreEPSS 0.3% · 17th percentile
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  9. 2026-10-28 16:30 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  10. 2026-10-28 14:25 UTCOSV refresh
  11. 2026-10-27 16:30 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  12. 2026-10-26 16:30 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  13. 2026-10-25 16:31 UTCEPSS rescoreEPSS 0.3% · 17th percentile
  14. 2026-10-25 16:28 UTCEG score recompute
  15. 2026-10-24 16:31 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  16. 2026-10-23 16:30 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  17. 2026-10-22 16:33 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  18. 2026-10-21 16:31 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  19. 2026-10-20 16:31 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  20. 2026-10-19 21:53 UTCEG score recompute
  21. 2026-10-19 21:53 UTCGHSA enrichmentGHSA-j92p-7382-5wph
  22. 2026-10-19 16:30 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  23. 2026-10-18 16:30 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  24. 2026-10-18 05:34 UTCEG score recompute
  25. 2026-10-17 16:33 UTCEPSS rescoreEPSS 0.3% · 16th percentile
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  1. 2026-10-16 16:38 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  2. 2026-10-15 16:30 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  3. 2026-10-14 16:31 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  4. 2026-10-13 16:32 UTCEPSS rescoreEPSS 0.3% · 16th percentile
  5. 2026-10-12 17:06 UTCEG score recompute
  6. 2026-10-12 16:33 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  7. 2026-10-11 20:39 UTCEG score recompute
  8. 2026-10-11 18:50 UTCEG score recompute
  9. 2026-10-11 15:27 UTCEG score recompute
  10. 2026-10-11 13:47 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  11. 2026-10-10 19:59 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  12. 2026-10-09 20:06 UTCEPSS rescoreEPSS 0.2% · 14th percentile
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  14. 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  15. 2026-10-06 15:16 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  16. 2026-10-06 06:09 UTCOSV refresh
  17. 2026-10-05 17:42 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  18. 2026-10-04 23:21 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  19. 2026-10-03 14:24 UTCEPSS rescoreEPSS 0.2% · 14th percentile
  20. 2026-10-01 19:49 UTCEPSS rescoreEPSS 0.2% · 14th percentile
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  31. 2026-09-16 13:50 UTCOSV refresh
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  47. 2026-08-28 21:40 UTCEPSS rescoreEPSS 0.2% · 15th percentile
  48. 2026-08-28 13:23 UTCOSV refresh
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Related CVEs(same vendor)

Frequently asked(4)

What is CVE-2025-40147?
CVE-2025-40147 is a vulnerability whose severity is not yet rated; its CVE record was published on November 12, 2025. In the Linux kernel, the following vulnerability has been resolved: blk-throttle: fix access race during throttle policy activation On repeated cold boots we occasionally hit a NULL pointer crash in blk_should_throtl() when throttling is consulted before the throttle policy is fully enabled for the…
When was the CVE record for CVE-2025-40147 published?
The CVE record for CVE-2025-40147 was published on November 12, 2025. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 19, 2026; the record at its source may have been updated since.
Is CVE-2025-40147 actively exploited?
CVE-2025-40147 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (17th percentile of EPSS-scored CVEs).
How do I remediate CVE-2025-40147?
A fix for CVE-2025-40147 is available: update to the fixed version the vendor names in its advisory.

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