In the Linux kernel before 5.4.2, the io_uring feature leads to requests that inadvertently have UID 0 and full capabilities, aka CID-181e448d8709. This is related to fs/io-wq.c, fs/io_uring.c, and net/socket.c. For example, an attacker can bypass intended restrictions on adding an IPv4 address to the loopback interface. This occurs because IORING_OP_SENDMSG operations, although requested in the context of an unprivileged user, are sometimes performed by a kernel worker thread without considering that context.
CVE-2019-19241
“—” beside the score: it is equal to NVD's CVSS score.
This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 1.1% (65th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.
- Public exploit code is available (Exploit-DB, marked verified by Exploit-DB)
A fix is available — apply it.
- CVSS v3
- 7.8
- EG Score
- 7.8HIGHmedium confidence
- EG Risk
- 61EG Risk 61/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity78% × 45%Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation65% × 40%EchelonGraph's fixed weight for EG-KEV Tier 2 (Weaponized): a constant, not a probability.Automatability0% × 15%CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.Exploitation public PoC (exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high. - EPSS PROB
- 1.1%
- EPSS %ILE
- 65th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is its impact severity (EG Severity), not escalated.
- EG Severity
- 7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
- EG Likelihood
- 1.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-21). 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
- SSVC Track* at medium mission impactTrack at low, Track* at medium and Attend at high mission impact.CISA 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: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.
A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
Exploitation public PoC (exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
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.
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
December 17, 2019
Last Modified
November 21, 2024
Advisory Details (5)
Auto-updated Oct 11, 2026net: disallow ancillary data for __sys_{send,recv}msg_file() - kernel/git/torvalds/linux.git - Linux kernel source tree
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d69e07793f891524c6bbf1e75b9ae69db4450953io_uring: async workers should inherit the user creds - kernel/git/torvalds/linux.git - Linux kernel source tree
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=181e448d8709e517c9c7b523fcd209f24eb38ca7Patch Availability(1)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| ubuntu | linux-image-virtual (5.3.0.40.34) @ eoan | 2026-10-21 | ubuntu |
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
(4 across 4 ecosystems)
Debian:11(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | — |
| — |
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | — |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | — |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| linux | — |
| — |
All Vendor Advisories
(1)
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 / 36× 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 95 of 180 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. 5 repeat rows among the latest 100 are merged into the row they repeat. The 85 oldest rows on record are not shown and were not checked, so the counts can still include repeats.
- 2026-10-22 16:28 UTCEPSS rescoreEPSS 1.1% · 65th percentile
- 2026-10-21 17:57 UTCEG score recompute
- 2026-10-21 17:57 UTCVendor advisory
- 2026-10-21 17:57 UTCGHSA enrichmentGHSA-wxfp-qr5h-g4wx
- 2026-10-21 16:27 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-20 16:27 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-20 15:55 UTCOSV refresh
- 2026-10-19 16:27 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-18 16:27 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-18 09:49 UTCEG score recompute
- 2026-10-17 16:28 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-16 16:31 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-15 16:27 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-14 16:28 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-13 16:27 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-12 19:58 UTCEG score recompute
- 2026-10-12 16:28 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-12 00:21 UTCEG score recompute
- 2026-10-11 13:42 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-10 19:55 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-09 20:03 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-08 16:37 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-07 23:43 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-06 15:12 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-05 17:39 UTCEPSS rescoreEPSS 1.1% · 64th percentile
Show 70 moreShow fewer
- 2026-10-04 23:18 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-10-03 14:22 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-09-30 14:59 UTCEPSS rescoreEPSS 1.1% · 64th percentile
- 2026-09-30 10:15 UTCEG score recompute
- 2026-09-28 13:46 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-27 14:06 UTCOSV refresh
- 2026-09-27 13:40 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-26 15:54 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-26 00:20 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-24 13:59 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-23 13:43 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-22 14:43 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-21 20:28 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-20 20:10 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-18 19:22 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-17 19:22 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-16 14:04 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-15 03:05 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-13 16:42 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-12 14:56 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-11 14:48 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-11 09:32 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-07 22:51 UTCOSV refresh
- 2026-09-07 15:57 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-06 13:44 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-05 15:24 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-09-04 13:56 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-02 14:07 UTCEPSS rescoreEPSS 1.1% · 63rd percentile
- 2026-09-01 03:32 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-30 19:13 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-30 01:18 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-28 21:36 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-27 14:21 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-26 14:42 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-25 13:45 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-24 14:11 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-21 23:45 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-21 08:14 UTCOSV refresh
- 2026-08-20 22:51 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-19 17:00 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-18 13:44 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-17 13:43 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-16 14:52 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-16 02:10 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-15 01:26 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-12 13:47 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-09 13:43 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-08 16:33 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-07 16:23 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-06 13:43 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-05 21:54 UTCOSV refresh
- 2026-08-05 19:13 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-04 15:05 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-02 02:23 UTCEPSS rescoreEPSS 1.1% · 62nd percentile
- 2026-08-01 04:12 UTCEPSS rescoreEPSS 1.1% · 61st percentile
- 2026-07-30 16:24 UTCEPSS rescoreEPSS 1.1% · 61st percentile
- 2026-07-30 01:27 UTCEPSS rescoreEPSS 1.1% · 61st percentile
- 2026-07-28 15:32 UTCEPSS rescoreEPSS 1.1% · 61st percentile
- 2026-07-26 14:51 UTCEPSS rescoreEPSS 1.1% · 61st percentile
- 2026-07-25 14:14 UTCEPSS rescoreEPSS 1.1% · 61st percentile
- 2026-07-24 14:14 UTCEPSS rescoreEPSS 1.1% · 61st percentile
- 2026-07-23 14:15 UTCEPSS rescoreEPSS 1.1% · 61st percentile
- 2026-07-23 01:43 UTCEG score recompute
- 2026-07-22 22:23 UTCEG score recompute
- 2026-07-22 14:05 UTCEPSS rescoreEPSS 1.1% · 61st percentile
- 2026-07-21 15:22 UTCEPSS rescoreEPSS 1.1% · 61st percentile
- 2026-07-20 17:04 UTCEPSS rescoreEPSS 1.1% · 61st percentile
- 2026-07-19 23:48 UTCOSV refresh
- 2026-07-19 14:28 UTCEPSS rescoreEPSS 1.1% · 61st percentile
- 2026-07-19 02:26 UTCEPSS rescoreEPSS 1.1% · 61st percentile
Publicly available exploits
(1 reference)Public exploit code is referenced for this CVE (1 Exploit-DB entry). Defenders should treat patch urgency accordingly.
- Exploit-DBEDB-47779✓ verifiedPublished Dec 16, 2019
Linux 5.3 - Privilege Escalation via io_uring Offload of sendmsg() onto Kernel Thread with Kernel Creds
Open source ↗
Related CVEs(same vendor)
Same vendor
10 shownubuntu:USN-4284-1
Frequently asked(5)
What is CVE-2019-19241?
When was the CVE record for CVE-2019-19241 published?
Is CVE-2019-19241 actively exploited?
What is the CVSS score of CVE-2019-19241?
How do I remediate CVE-2019-19241?
Dependency Blast Radius
See which npm, PyPI, Go, and Maven packages are affected by CVE-2019-19241
Is Your Infrastructure Affected by CVE-2019-19241?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.