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CVE-2026-43157: octeontx2-af: CGX: fix bitmap leaks

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-06 · updated 2026-06-17
• Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: CGX: fix bitmap leaks The RX/TX flow-control bitmaps (rx_fc_pfvf_bmap and tx_fc_pfvf_bmap) are allocated by cgx_lmac_init() but never freed in cgx_lmac_exit(). Unbinding and rebinding the driver therefore triggers kmemleak: unreferenced object (size 16): backtrace: rvu_alloc_bitmap cgx_probe Free both bitmaps during teardown.

Affected products

• Linux kernel: from 5.18 before 6.1.165; from 6.2 before 6.6.128; from 6.7 before 6.12.75; from 6.13 before 6.18.16; from 6.19 before 6.19.6 — fixed in 6.1.165, 6.12.75, 6.18.16, 6.19.6, 6.6.128

How to fix

Upgrade to a fixed version: Linux kernel 6.1.165, 6.12.75, 6.18.16, 6.19.6. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/013ac469596a0b8671e62d89c89ae0bd46bbe667
• https://git.kernel.org/stable/c/3def995c4ede842adf509c410e92d09a0cedc965
• https://git.kernel.org/stable/c/6d389382ee655128056fbdab86baad8495ffbf33
• https://git.kernel.org/stable/c/ad8a13a45c5c24d0d32de9a1c3fd58498a675ece
• https://git.kernel.org/stable/c/ccca14bbdcc25829d355b9f4d3249f43dadb71c1
• https://git.kernel.org/stable/c/ccef79af58b43787c25710c9da96651c6ddfe50f

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