CVE-2022-0847 · Dirty Pipe
The record is as the index held it on 2026-10-03. The KEV listing and the EPSS score were read on 2026-10-18, and a value that moved since the build is dated to that read. Changes between those two dates are not all shown.
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A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe and…
rank 77 = 40 + 20 + 1 + 10 + 6
rank@v1 · act now
Someone is already using it
CISA KEV catalog · public proof-of-concept · FIRST EPSS
EPSS 0.92795 · CISA KEV listed · without this subject the record ranks 37
What it costs you if it fires
NVD CVSS base score, then the CNA's own
CVSS 7.8, from NVD · without this subject the record ranks 57
It is getting worse, not staying still
FIRST EPSS series, rescorings and bad loads removed
rose on 2025-11-18 · without this subject the record ranks 76
How much of the world it touches
NVD CPE configurations
20 products in the CPE ranges · without this subject the record ranks 67
Someone else already set the date
CISA KEV remediation due date
CISA remediation date held · without this subject the record ranks 71
Hindsight · the state
Foresight · where to check next
This record is one instance of CWE-665, improper initialization. The index holds 363 prior instances of this class, 2 KEV-listed. The nearest of its KEV-listed records are drawn beside this. taxonomy@v1
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The fix, and how long it's been waiting.
Exploit Status & Known PoCs a ladder, not a score
Current rung: Exploited in the wild · CISA KEV listed, 2022-04-25.
Affected & Fixed Versions as published
Show all 20 published ranges
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$4.63M = $4.99M incident cost x 1 exposure x 0.92795 likelihood
udv@v1 · unaudited · wrong for you until you say what you run
$4.99M is the cost of a breach that happened, from IBM Cost of a Data Breach Report 2026, global average. It is not the value of any asset of yours. That average already covers breaches of every severity, so scaling it by exposure understates a partial-impact record. That is an assumption, not a measurement. Your own asset value goes in the decision record.
What it is stated by the CNA
Dirty Pipe is the common name for CVE-2022-0847. A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe and push_pipe functions in the Linux kernel and could thus contain stale values. An unprivileged local user could use this flaw to write to pages in the page cache backed by read only files and as such escalate their privileges on the system. cve-aliases@2026-08-27
NVD's analysis a second authority
- severity
- 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- weakness
- CWE-665
- affected versions
- linux kernel >= 5.8 < 5.10.102; linux kernel >= 5.15 < 5.15.25; linux kernel >= 5.16 < 5.16.11; and 17 more, listed in full below
- also scored by
- 7.8 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
check it yourself bugzilla.redhat.com dirtypipe.cm4all.com packetstormsecurity.com packetstormsecurity.com packetstormsecurity.com suse.com +4 morereceipt
Dated events
Movement the material steps
This score more than doubled inside 72 hours. Both observations are in the full history below.
Show all 122 observations
122 observations held. A highlighted step crossed a promotion threshold. A step marked with a scoring model moved because the instrument was replaced, not because the vulnerability changed. receipt
The full biography
Listed by CISA 49 days after it published, exploit probability more than doubled between 2022-03-08 and 2022-03-09 (0.01412 → 0.06006) and the record had been public for 4 years, 7 months when this index was last written.
No material movement in 21 days as of the last ingest this index recorded.
The pattern, elsewhere
This record is one instance of CWE-665, improper initialization. The index holds 363 prior instances of this class, 2 KEV-listed. The nearest of its KEV-listed records are drawn beside this. cwe-consequences@4.20
"Matches n of m" counts the attributes the two records can both be compared on: the CVSS metrics they share a version of, any weakness class beyond this one, and the vendor. fit-rules@v1
363 records in this class held. The six above are drawn from the ones CISA has listed as exploited, ranked by how much of the record matches this one. That is why every one of them is KEV-listed: the pool is, so the colour on those spokes says nothing the pool has not already said.
No curated product neighbourhood is held for this product, so the records above are the nearest this index can name. The neighbourhood table covers a small set of products and is extended by hand.
Siblings and hubs
Records related to this one
No record cites this identifier and it carries no alias. Its defect family is below.
Its defect family
kernel
Of the 4 records in this family that state one, this holds the highest NVD CVSS score: 7.8.
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Family membership: held values
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What usually comes next
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