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CVE-2026-43105: drm/vc4: Fix memory leak of BO array in hang state

• 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: drm/vc4: Fix memory leak of BO array in hang state The hang state's BO array is allocated separately with kzalloc() in vc4_save_hang_state() but never freed in vc4_free_hang_state(). Add the missing kfree() for the BO array before freeing the hang state struct.

Affected products

• Linux kernel: from 4.5 before 6.6.136; from 6.7 before 6.12.83; from 6.13 before 6.18.24; from 6.19 before 6.19.14; 7.0-rc1, 7.0-rc2, 7.0-rc3, 7.0-rc4, 7.0-rc5, 7.0-rc6 (+1) — fixed in 6.12.83, 6.18.24, 6.19.14, 6.6.136

How to fix

Upgrade to a fixed version: Linux kernel 6.12.83, 6.18.24, 6.19.14, 6.6.136. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0d3c014a84396a147705f523a8fd6fc873e76502
• https://git.kernel.org/stable/c/421cea4f71f7cf65abaae878562ee4aa2b684628
• https://git.kernel.org/stable/c/686bb2fce082f043db50db02b5de5c64ca4dc4c4
• https://git.kernel.org/stable/c/7235fc096ece53211bd2c0e958c65f9b802aeb98
• https://git.kernel.org/stable/c/9c092941fc1d00933bcb46ecac1cb930db3abf5d
• https://git.kernel.org/stable/c/a812008fe3a0aebb778d277b35717f64e23d0302
• https://git.kernel.org/stable/c/b8138567c4a80fd76a647849ebd4284996cf4b17
• https://git.kernel.org/stable/c/f4dfd6847b3e5d24e336bca6057485116d17aea4

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