CVE-2026-23059
In the Linux kernel, the following vulnerability has been resolved: scsi: qla2xxx: Sanitize payload size to prevent member overflow In qla27xx_copy_fpin_pkt() and qla27xx_copy_multiple_pkt(), the frame_size reported by firmware is used to calculate the copy length into item->iocb. However, the iocb member is defined as a fixed-size 64-byte array within struct purex_item. If the reported frame_size exceeds 64 bytes, subsequent memcpy calls will overflow the iocb member boundary. While extra memory might be allocated, this cross-member write is unsafe and triggers warnings under CONFIG_FORTIFY_SOURCE. Fix this by capping total_bytes to the size of the iocb member (64 bytes) before allocation and copying. This ensures all copies remain within the bounds of the destination structure member.
Affected versions
Linux kernel versions
6.6
and later are affected. Fixed in
6.6.122,
6.12.68,
6.18.8,
6.19
and their respective stable series.
References
The following references provide additional information about CVE-2026-23059 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
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PatchKernel patch commithttps://git.kernel.org/stable/c/1922468a4a80424e5a69f7ba50adcee37f4722e9
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PatchKernel patch commithttps://git.kernel.org/stable/c/19bc5f2a6962dfaa0e32d0e0bc2271993d85d414
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PatchKernel patch commithttps://git.kernel.org/stable/c/408bfa8d70f79ac696cec1bdbdfb3bf43a02e6d0
Frequently asked questions
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What is CVE-2026-23059?
CVE-2026-23059 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.6 onward and has been patched in 6.6.122, 6.12.68, 6.18.8 and others. CVE-2026-23059 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-23059?
Yes — CVE-2026-23059 has been patched. Fixed versions include 6.6.122, 6.12.68, 6.18.8 and others. If you are running Linux kernel 6.6 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-23059 actively exploited?
No — CVE-2026-23059 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.