CVE-2026-98807

net/mlx5: Fix slab-out-of-bounds when handling team device events

CVE-2026-98807 is fixed in 39 products on 1 platform, first by DEBIAN-CVE-2026-98807, released October 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine
CVSS
3.4
Low
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0018
7th percentile

In the Linux kernel, the following vulnerability has been resolved: net/mlx5: Fix slab-out-of-bounds when handling team device events The mlx5_handle_changeupper_event() and mlx5_handle_changeinfodata_event() functions check for LAG masters (which includes both bonding and team devices) but only call bonding-specific APIs. When processing team device events, calling bond_slave_get_rcu() and bond_is_slave_inactive() on team_port structures causes KASAN to detect an out-of-bounds memory access since team_port is smaller than bond slave. Fix this by wrapping the bond-specific API calls with a check for bonding devices. This allows the function to still process LAG events for both bonding and teams but only calls bond-specific functions when dealing with actual bonding devices. For mlx5_handle_changeinfodata_event(), keep the explicit bond check as mlx5 doesn't handle state information for team ports anyway. Tested with Mellanox ConnectX-5 on Linux 7.2.0-rc6: - Bonding: PASS (no regressions) - Team device: PASS (no KASAN errors)

Where it's fixed

ProductFixed inFixReleased
Linux
bpftool6.12 · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
bpftool6.12-debuginfo · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
bpftool6.18 · amzn 2023 1:6.18.56-125.164.amzn2023 ALAS2023-2026-3251 Nov 7, 2026
bpftool6.18-debuginfo · amzn 2023 1:6.18.56-125.164.amzn2023 ALAS2023-2026-3251 Nov 7, 2026
kernel-livepatch-6.12.113-138.209 · amzn 2023 1:1.0-0.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel-livepatch-6.18.56-125.164 · amzn 2023 1:1.0-0.amzn2023 ALAS2023-2026-3251 Nov 7, 2026
kernel6.12 · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel6.12-debuginfo · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel6.12-debuginfo-common-aarch64 · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel6.12-debuginfo-common-x86_64 · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel6.12-devel · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel6.12-headers · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel6.12-modules-extra · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel6.12-modules-extra-common · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel6.12-tools · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel6.12-tools-debuginfo · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel6.12-tools-devel · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel6.18 · amzn 2023 1:6.18.56-125.164.amzn2023 ALAS2023-2026-3251 Nov 7, 2026
kernel6.18-debuginfo · amzn 2023 1:6.18.56-125.164.amzn2023 ALAS2023-2026-3251 Nov 7, 2026
kernel6.18-debuginfo-common-aarch64 · amzn 2023 1:6.18.56-125.164.amzn2023 ALAS2023-2026-3251 Nov 7, 2026
kernel6.18-debuginfo-common-x86_64 · amzn 2023 1:6.18.56-125.164.amzn2023 ALAS2023-2026-3251 Nov 7, 2026
kernel6.18-devel · amzn 2023 1:6.18.56-125.164.amzn2023 ALAS2023-2026-3251 Nov 7, 2026
kernel6.18-headers · amzn 2023 1:6.18.56-125.164.amzn2023 ALAS2023-2026-3251 Nov 7, 2026
kernel6.18-modules-extra · amzn 2023 1:6.18.56-125.164.amzn2023 ALAS2023-2026-3251 Nov 7, 2026
kernel6.18-modules-extra-common · amzn 2023 1:6.18.56-125.164.amzn2023 ALAS2023-2026-3251 Nov 7, 2026
kernel6.18-tools · amzn 2023 1:6.18.56-125.164.amzn2023 ALAS2023-2026-3251 Nov 7, 2026
kernel6.18-tools-debuginfo · amzn 2023 1:6.18.56-125.164.amzn2023 ALAS2023-2026-3251 Nov 7, 2026
kernel6.18-tools-devel · amzn 2023 1:6.18.56-125.164.amzn2023 ALAS2023-2026-3251 Nov 7, 2026
linux · Debian 13.5 (trixie) 6.12.113-1 DEBIAN-CVE-2026-98807 Oct 19, 2026
linux · Debian 14 7.2.10-1 DEBIAN-CVE-2026-98807 Oct 19, 2026
linux-6.12 · Debian 12.15 (bookworm) 6.12.113-1~deb12u1 DEBIAN-CVE-2026-98807 Oct 19, 2026
microvm-kernel6.18 · amzn 2023 1:6.18.56-125.164.amzn2023 ALAS2023-2026-3251 Nov 7, 2026
perf6.12 · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
perf6.12-debuginfo · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
perf6.18 · amzn 2023 1:6.18.56-125.164.amzn2023 ALAS2023-2026-3251 Nov 7, 2026
perf6.18-debuginfo · amzn 2023 1:6.18.56-125.164.amzn2023 ALAS2023-2026-3251 Nov 7, 2026
python3-perf6.12 · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
python3-perf6.12-debuginfo · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
python3-perf6.18 · amzn 2023 1:6.18.56-125.164.amzn2023 ALAS2023-2026-3251 Nov 7, 2026
python3-perf6.18-debuginfo · amzn 2023 1:6.18.56-125.164.amzn2023 ALAS2023-2026-3251 Nov 7, 2026

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