Unknown

CVE-2022-50728 — s390/lcs: Fix return type of lcs_start_xmit()

In the Linux kernel, the following vulnerability has been resolved: s390/lcs: Fix return type of lcs_start_xmit() 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/lcs.c:2090:21: 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 = lcs_start_xmit, ^~~~~~~~~~~~~~ drivers/s390/net/lcs.c:2097:21: 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 = lcs_start_xmit, ^~~~~~~~~~~~~~ ->ndo_start_xmit() in 'struct net_device_ops' expects a return type of 'netdev_tx_t', not 'int'. Adjust the return type of lcs_start_xmit() to match the prototype's to resolve the warning and potential CFI failure, should s390 select ARCH_SUPPORTS_CFI_CLANG in the future.

Published Dec 24, 2025 · Updated Oct 13, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.3% (30-day exploitation probability)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.28%

ahead of 19% of scored CVEs · Oct 14, 2026

Affects

Linux

CVSS base

—

Score not published yet.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ dc1f8bf68b311b1537cb65893430b6796118498a and < 7b4da3fcd513b8e67823eb80da37aad99b3339c1≥ dc1f8bf68b311b1537cb65893430b6796118498a and < d49cc2b705711fb8fb849e7c660929b2100360b7≥ dc1f8bf68b311b1537cb65893430b6796118498a and < e684215d8a903752e2b0cc946517fb61e57a880a≥ dc1f8bf68b311b1537cb65893430b6796118498a and < 20022d551f2064a194d8e0acb6cd7a85094a17b2≥ dc1f8bf68b311b1537cb65893430b6796118498a and < ebc3c77785dc8b5b626309c0032a38fbb139287a≥ dc1f8bf68b311b1537cb65893430b6796118498a and < 5ad774fb823c24bbeb21a15a67103ea7a6f5b928≥ dc1f8bf68b311b1537cb65893430b6796118498a and < 69669820844f81a77b6db24b86581320ae4d17af≥ dc1f8bf68b311b1537cb65893430b6796118498a and < cda74cdc280ba35c8993e7517bac5c257ff36f18 and 2 more ≥ dc1f8bf68b311b1537cb65893430b6796118498a and < bb16db8393658e0978c3f0d30ae069e878264fa3version 2.6.32	Vulnerable	CVE Program (cve.org) e CISA ADP

EPSS over time FIRST

Oct 13, 2026 → Oct 14, 2026 · 2 reading(s) · max 0.28%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Not enough vector or weakness data: use the affected application’s logs as a starting point.

application logs

Timeline

What happened to this CVE, newest first.

2026
Record published
Oct 13, 2026
Affected products added · linux/linux
Oct 13, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Deferred
Oct 13, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 13, 2026 · NIST National Vulnerability Database
2025
CVE published
Dec 24, 2025 · Linux

Source activity

Repeated readings are counted rather than listed.

1× Official description updated · Oct 13, 2026 – Oct 13, 2026

References

9 on the record

git.kernel.org/stable/c/20022d551f2064a194d8e0acb6cd7a85094a17b2
NIST National Vulnerability Database
git.kernel.org/stable/c/5ad774fb823c24bbeb21a15a67103ea7a6f5b928
NIST National Vulnerability Database
git.kernel.org/stable/c/7b4da3fcd513b8e67823eb80da37aad99b3339c1
NIST National Vulnerability Database
git.kernel.org/stable/c/69669820844f81a77b6db24b86581320ae4d17af
NIST National Vulnerability Database
git.kernel.org/stable/c/bb16db8393658e0978c3f0d30ae069e878264fa3
NIST National Vulnerability Database
git.kernel.org/stable/c/d49cc2b705711fb8fb849e7c660929b2100360b7
NIST National Vulnerability Database
git.kernel.org/stable/c/cda74cdc280ba35c8993e7517bac5c257ff36f18
NIST National Vulnerability Database
git.kernel.org/stable/c/e684215d8a903752e2b0cc946517fb61e57a880a
NIST National Vulnerability Database
git.kernel.org/stable/c/ebc3c77785dc8b5b626309c0032a38fbb139287a
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 10h
Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 10h
Unknown CVE-2026-98424 wifi: cfg80211: undo netns switch if renaming the wiphy fails 1d
Unknown CVE-2026-98425 wifi: mac80211: don't warn when an IBSS has no channel to scan 1d
Unknown CVE-2026-98426 wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path 1d
Unknown CVE-2026-98427 net/sched: codel: bound the dropping loop per dequeue call 1d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No CVSS score published by NVD, the CNA, CISA or GitHub so far.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2022-50728 is "s390/lcs: Fix return type of lcs_start_xmit()", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.28% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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