SB20260507190 - Memory leak in Linux kernel octeontx2 af driver
Published: May 7, 2026
Security Bulletin ID
SB20260507190
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Partial DoS
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Memory leak (CVE-ID: CVE-2026-43157)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a memory leak in cgx_lmac_exit() when unbinding and rebinding the driver. A local user can repeatedly unbind and rebind the driver to cause a denial of service.
The issue involves the rx_fc_pfvf_bmap and tx_fc_pfvf_bmap bitmaps allocated by cgx_lmac_init() and left unfreed during teardown.
Remediation
Install update from vendor's website.
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