Skip to content
Noroxi
NVD / CVE Program· CNA Linux

CVE-2026-93222: signal: avoid shared siginfo namespace rewrites

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 03c8761e75d1619906bb503686f9cc1dfc6a67f4, 148b0dae2a1755beb873a2aab51fb191414f068c, 4ee7c4e4719a825052f42f02ec159b5b42b68fbc; azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 6.6.157.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 03c8761e75d1619906bb503686f9cc1dfc6a67f4, 148b0dae2a1755beb873a2aab51fb191414f068c, 4ee7c4e4719a825052f42f02ec159b5b42b68fbc; azl3 kernel 6.6.150.1-1 on Azure Linux 3.0 6.6.157.1-1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: signal: avoid shared siginfo namespace rewrites send_signal_locked() rewrites sender ids for the target namespace. Group sends reuse the same siginfo, so one recipient can affect the next. Copy the siginfo before changing it.

—No exploit Fix available
Published
Sep 24, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 7th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-93222

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for linux records
Is your version affected? Check it

Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

We use this product, ask for help

Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • e897dd22800f02bd48aefb1511fff0b2ce96e94c, 2f0e9eed11ca778d0ec5507a739c28472fd4ca20, 5.3affected
    • 7a0cf094944e2540758b7f957eb6846d5126f535 and later · before e015d1ac6b43a23c52c5163299414ae77d7d4ae0affected · git
    • 7a0cf094944e2540758b7f957eb6846d5126f535 and later · before 4ee7c4e4719a825052f42f02ec159b5b42b68fbcaffected · git
    • 7a0cf094944e2540758b7f957eb6846d5126f535 and later · before 148b0dae2a1755beb873a2aab51fb191414f068caffected · git
    • 7a0cf094944e2540758b7f957eb6846d5126f535 and later · before 6b1de022304ef85284c5933a5fb8492f6f54efc9affected · git
    • 7a0cf094944e2540758b7f957eb6846d5126f535 and later · before 03c8761e75d1619906bb503686f9cc1dfc6a67f4affected · git
    • 7a0cf094944e2540758b7f957eb6846d5126f535 and later · before a246da20c8e4ae4319511c698b9f26ad0ad1769faffected · git
    • 7a0cf094944e2540758b7f957eb6846d5126f535 and later · before b655c2040ce836afad5643842543567b31f8c11daffected · git
    • 7a0cf094944e2540758b7f957eb6846d5126f535 and later · before d19cdc167e696714509e87d3f7ae765b6e164589affected · git
    • 5.1.20 and later · before 5.2affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.111-1~deb12u16.12.111-1~deb12u1
Debian:13linuxbefore 6.12.111-16.12.111-1
Debian:14linuxbefore 7.2.6-17.2.6-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-93220Sep 24, 2026 · sched_ext: Keep kick_sync waiting on the rq's own CPU
    0Monitor
  • ← EarlierCVE-2026-93221Sep 24, 2026 · nfsd: convert nfsd_net boolean flags to unsigned long flags word
    32Monitor
  • Later →CVE-2026-93223Sep 24, 2026 · staging: media: tegra-video: fix of_node_put() on VIP parse errors
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux03c8761e75d1619906bb503686f9cc1dfc6a67f4Vendor (CNA)
Linux Linux148b0dae2a1755beb873a2aab51fb191414f068cVendor (CNA)
Linux Linux4ee7c4e4719a825052f42f02ec159b5b42b68fbcVendor (CNA)
Linux Linux5.2Vendor (CNA)
Linux Linux5.3Vendor (CNA)
Linux Linux6b1de022304ef85284c5933a5fb8492f6f54efc9Vendor (CNA)
Linux Linuxa246da20c8e4ae4319511c698b9f26ad0ad1769fVendor (CNA)
Linux Linuxb655c2040ce836afad5643842543567b31f8c11dVendor (CNA)
Linux Linuxd19cdc167e696714509e87d3f7ae765b6e164589Vendor (CNA)
Linux Linuxe015d1ac6b43a23c52c5163299414ae77d7d4ae0Vendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.06.6.157.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.111-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.111-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records