Incorrect calculation in Linux kernel - CVE-2026-98275
Published: October 15, 2026
Vulnerability identifier: #VU155940
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98275
CWE-ID: CWE-682
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to leave RX overrun interrupts unacknowledged.
The vulnerability exists due to incorrect interrupt acknowledgment bit selection in the Cortina Gemini Ethernet driver's gmac_irq() function when handling RX overrun interrupts. A local user can trigger RX overrun interrupt handling to leave RX overrun interrupts unacknowledged.
For GMAC0, the acknowledgment writes the GMAC1 overrun bit instead; for GMAC1, the shift leaves no bit set in the 32-bit register.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-98275
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.113-1
linux (Debian package) - update to 6.12.113-1
External References
- https://git.kernel.org/stable/c/1163cc82dcbc145f912bf2106ab668762f53e483
- https://git.kernel.org/stable/c/12a0c7bb448c1899ea3d8f97fa47a8740044e16d
- https://git.kernel.org/stable/c/1dd85662fee6e2ac580b1c4f9a0c0a7ae6e31f0e
- https://git.kernel.org/stable/c/2f23fa11fef9b4a93335894379d82238f0a28228
- https://git.kernel.org/stable/c/472493d1d3334d104b9873abc1c2d80ed3b144f3
- https://git.kernel.org/stable/c/4f33e036e827f368cdb10bcb15ad098448aca0f5
- https://git.kernel.org/stable/c/d4bd670454390aab72ab9fb7b73bce2966c33fe3
- https://git.kernel.org/stable/c/d72d87926ca33c6766dc73ace46859d7220a45bb