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CVE-2026-23038: pnfs/flexfiles: Fix memory leak in nfs4_ff_alloc_deviceid_node()

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-31 · updated 2026-10-19
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: pnfs/flexfiles: Fix memory leak in nfs4_ff_alloc_deviceid_node() In nfs4_ff_alloc_deviceid_node(), if the allocation for ds_versions fails, the function jumps to the out_scratch label without freeing the already allocated dsaddrs list, leading to a memory leak. Fix this by jumping to the out_err_drain_dsaddrs label, which properly frees the dsaddrs list before cleaning up other resources.

Affected products

• Linux kernel: 4.0 — fixed in 6.19

How to fix

Upgrade to a fixed version: Linux kernel 6.19. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0c728083654f0066f5e10a1d2b0bd0907af19a58
• https://git.kernel.org/stable/c/27c90d8ed81e7a289c9fe41b5e31d8bb609a3385
• https://git.kernel.org/stable/c/34b9dd179818ff7af2b36410985fd8166573c62d
• https://git.kernel.org/stable/c/869862056e100973e76ce9f5f1b01837771b7722
• https://git.kernel.org/stable/c/86da7efd12295a7e2b4abde5e5984c821edd938f
• https://git.kernel.org/stable/c/e2dde5dafb80f1af4028ed10ad255f42af71c784
• https://git.kernel.org/stable/c/ed5d3f2f6885eb99f729e6ffd946e3aa058bd3eb
• https://cert-portal.siemens.com/productcert/html/ssa-019113.html
• https://cert-portal.siemens.com/productcert/html/ssa-253495.html
• https://cert-portal.siemens.com/productcert/html/ssa-457936.html

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