SB20260928139 - Use-after-free in Linux kernel broadcom asp2 driver

Description

This security bulletin contains information about 1 vulnerability.

1) Use-after-free (CVE-ID: CVE-2026-98052)

CWE-ID: CWE-416 - Use After Free

CVSSv4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local user to cause a use-after-free condition.

The vulnerability exists due to use-after-free in the bcmasp_xmit() transmit descriptor handling when transmitting fragmented SKBs. A local user can transmit a fragmented SKB to cause a use-after-free condition.

The condition requires a descriptor slot to be reused with a stale final-fragment indicator while remaining SKB fragments are still in flight.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/17e6ad484dea5ddf1c4a3d6ec77a5929161234de
• https://git.kernel.org/stable/c/18e5e0ec0e9282c897e2aa81a3e43ccaee03b003
• https://git.kernel.org/stable/c/47a5cecca925ceb175d5adf712e667acf78f475f
• https://git.kernel.org/stable/c/9b26b54861ce05307d39a54ddedddf8747419614