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NVD / CVE Program· CNA Linux

CVE-2022-50564: s390/netiucv: Fix return type of netiucv_tx()

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: 0.24% (FIRST EPSS).
  • Fixed version: Linux Linux 3ac0217ca9186c2f9af9a0113a331a42aa847894, 4bee3c75d5bf7c2b5dc0b520410eb40449e5da31, 85d392710275355425df8618ccbebbc336f5acc5.

Low priority for now. Upgrade to Linux Linux 3ac0217ca9186c2f9af9a0113a331a42aa847894, 4bee3c75d5bf7c2b5dc0b520410eb40449e5da31, 85d392710275355425df8618ccbebbc336f5acc5 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: s390/netiucv: Fix return type of netiucv_tx() With clang's kernel control flow integrity (kCFI, CONFIG_CFI_CLANG), indirect call targets are validated against the expected function pointer prototype to make sure the call target is valid to help mitigate ROP attacks. If they are not identical, there is a failure at run time, which manifests as either a kernel panic or thread getting killed. A proposed warning in clang aims to catch these at compile time, which reveals: drivers/s390/net/netiucv.c:1854:21: error: incompatible function pointer types initializing 'netdev_tx_t (*)(struct sk_buff *, struct net_device *)' (aka 'enum netdev_tx (*)(struct sk_buff *, struct net_device *)') with an expression of type 'int (struct sk_buff *, struct net_device *)' [-Werror,-Wincompatible-function-pointer-types-strict] .ndo_start_xmit = netiucv_tx, ^~~~~~~~~~ ->ndo_start_xmit() in 'struct net_device_ops' expects a return type of 'netdev_tx_t', not 'int'. Adjust the return type of netiucv_tx() to match the prototype's to resolve the warning and potential CFI failure, should s390 select ARCH_SUPPORTS_CFI_CLANG in the future. Additionally, while in the area, remove a comment block that is no longer relevant.

—No exploit Fix available
Published
Oct 22, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 16th 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 · 0.2%

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Noroxi analysis

What does it mean in your environment?

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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

    • 2.6.32affected
    • dc1f8bf68b311b1537cb65893430b6796118498a and later · before f13d870fce90f01cf930bfaffecc8185ae0be21caffected · git
    • dc1f8bf68b311b1537cb65893430b6796118498a and later · before eccc88c0efe407e579291792ad07a7dedc0f63f0affected · git
    • dc1f8bf68b311b1537cb65893430b6796118498a and later · before 85d392710275355425df8618ccbebbc336f5acc5affected · git
    • dc1f8bf68b311b1537cb65893430b6796118498a and later · before 4bee3c75d5bf7c2b5dc0b520410eb40449e5da31affected · git
    • dc1f8bf68b311b1537cb65893430b6796118498a and later · before 3ac0217ca9186c2f9af9a0113a331a42aa847894affected · git
    • dc1f8bf68b311b1537cb65893430b6796118498a and later · before dfbf0122ea1b9b3e73fa22c8ff6bd888935c54fcaffected · git
    • dc1f8bf68b311b1537cb65893430b6796118498a and later · before e7a849f740e3576e79cba403697e916f4c3a6f12affected · git
    • dc1f8bf68b311b1537cb65893430b6796118498a and later · before d034fa43af92fc46a81d882f46d9cc3e4ffdbbccaffected · git
    • dc1f8bf68b311b1537cb65893430b6796118498a and later · before 88d86d18d7cf7e9137c95f9d212bb9fff8a1b4beaffected · git

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.4-16.1.4-1

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-2022-50562Oct 22, 2025 · tpm: acpi: Call acpi_put_table() to fix memory leak
    0Monitor
  • ← EarlierCVE-2022-50563Oct 22, 2025 · dm thin: Fix UAF in run_timer_softirq()
    0Monitor
  • Later →CVE-2022-50565Oct 22, 2025 · wifi: plfxlc: fix potential memory leak in __lf_x_usb_enable_rx()
    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 Linux3ac0217ca9186c2f9af9a0113a331a42aa847894Vendor (CNA)
Linux Linux4bee3c75d5bf7c2b5dc0b520410eb40449e5da31Vendor (CNA)
Linux Linux85d392710275355425df8618ccbebbc336f5acc5Vendor (CNA)
Linux Linux88d86d18d7cf7e9137c95f9d212bb9fff8a1b4beVendor (CNA)
Linux Linuxd034fa43af92fc46a81d882f46d9cc3e4ffdbbccVendor (CNA)
Linux Linuxdfbf0122ea1b9b3e73fa22c8ff6bd888935c54fcVendor (CNA)
Linux Linuxe7a849f740e3576e79cba403697e916f4c3a6f12Vendor (CNA)
Linux Linuxeccc88c0efe407e579291792ad07a7dedc0f63f0Vendor (CNA)
Linux Linuxf13d870fce90f01cf930bfaffecc8185ae0be21cVendor (CNA)
debian:linux6.1.4-1 · 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.

No history yet (it accumulates with the daily EPSS job).

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).

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✗ → ✓

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References

Show all references (8 more)

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

All records