What’s Vulnerable › Vulnerabilities

CVE-2026-53088: net: bcmgenet: fix off-by-one in bcmgenet_put_txcb

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-24 · updated 2026-10-19
• Weakness: CWE-193

Description

In the Linux kernel, the following vulnerability has been resolved: net: bcmgenet: fix off-by-one in bcmgenet_put_txcb The write_ptr points to the next open tx_cb. We want to return the tx_cb that gets rewinded, so we must rewind the pointer first then return the tx_cb that it points to. That way the txcb can be correctly cleaned up.

Affected products

• Linux kernel: from 3.16.50 before 3.17; from 4.13.1 before 5.10.258; from 5.11 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.141; from 6.7 before 6.12.91 — fixed in 3.17, 5.10.258, 5.15.209, 6.1.175, 6.12.91, 6.18.33

How to fix

Upgrade to a fixed version: Linux kernel 3.17, 5.10.258, 5.15.209, 6.1.175. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/14e9f86564fff7bcf7f45c1b69080e837b31d185
• https://git.kernel.org/stable/c/29394f722f620281f2ee9a47f947734e53d72c90
• https://git.kernel.org/stable/c/2a74590170427a3ca7cc4bb8690cdd559129c29c
• https://git.kernel.org/stable/c/4cab761fc51c65aef741fcece4a18f3554edbc09
• https://git.kernel.org/stable/c/57f3f53d2c9c5a9e133596e2f7bc1c50688a6d38
• https://git.kernel.org/stable/c/72df896e31ddd06fcc5a789f025ad7a62a18bc9b
• https://git.kernel.org/stable/c/85f34ec320d3881badfd4edc5fee5cd5012bb54d
• https://git.kernel.org/stable/c/fb9a3c1f547d0ff024dbfe7b6f327626ddf0a3de

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