Not yet scoredPublished Dec 24, 2025

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

Updated under an hour ago (Oct 26, 2026, 9:50 PM ET)

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Exploited in the last 30 days

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.

CVSS: Not yet scored
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Deferred
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from dc1f8bf68b311b1537cb65893430b6796118498a before 7b4da3fcd513b8e67823eb80da37aad99b3339c1; from dc1f8bf68b311b1537cb65893430b6796118498a before d49cc2b705711fb8fb849e7c660929b2100360b7; from dc1f8bf68b311b1537cb65893430b6796118498a before e684215d8a903752e2b0cc946517fb61e57a880a; from dc1f8bf68b311b1537cb65893430b6796118498a before 20022d551f2064a194d8e0acb6cd7a85094a17b2; from dc1f8bf68b311b1537cb65893430b6796118498a before ebc3c77785dc8b5b626309c0032a38fbb139287a; from dc1f8bf68b311b1537cb65893430b6796118498a before 5ad774fb823c24bbeb21a15a67103ea7a6f5b928; from dc1f8bf68b311b1537cb65893430b6796118498a before 69669820844f81a77b6db24b86581320ae4d17af; from dc1f8bf68b311b1537cb65893430b6796118498a before cda74cdc280ba35c8993e7517bac5c257ff36f18; and 1 more ranges	CNA record

References

References

https://git.kernel.org/stable/c/7b4da3fcd513b8e67823eb80da37aad99b3339c1
https://git.kernel.org/stable/c/d49cc2b705711fb8fb849e7c660929b2100360b7
https://git.kernel.org/stable/c/e684215d8a903752e2b0cc946517fb61e57a880a
https://git.kernel.org/stable/c/20022d551f2064a194d8e0acb6cd7a85094a17b2
https://git.kernel.org/stable/c/ebc3c77785dc8b5b626309c0032a38fbb139287a
https://git.kernel.org/stable/c/5ad774fb823c24bbeb21a15a67103ea7a6f5b928
https://git.kernel.org/stable/c/69669820844f81a77b6db24b86581320ae4d17af
https://git.kernel.org/stable/c/cda74cdc280ba35c8993e7517bac5c257ff36f18
https://git.kernel.org/stable/c/bb16db8393658e0978c3f0d30ae069e878264fa3

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.