Answer in brief
CVE-2026-98798 records a Unknown severity vulnerability in net: bcmgenet: fix NULL dereference in set_coalesce before first open. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=9f4ca05827a27ec73bf63a42732f1978b8a779af <0d867b91598b6ed2f75998c34f4e2869631da31e || >=9f4ca05827a27ec73bf63a42732f1978b8a779af <2294b62eaec6fd3c76a261d287f66641eeafd5f0 || >=9f4ca05827a27ec73bf63a42732f1978b8a779af <d870102b5425390cab42eebbf3d19ec6a43c6734 || >=9f4ca05827a27ec73bf63a42732f1978b8a779af <19419faf58dfe5bcc8a9e60e622976c5f8e3ddc1 | 0d867b91598b6ed2f75998c34f4e2869631da31e, 2294b62eaec6fd3c76a261d287f66641eeafd5f0, d870102b5425390cab42eebbf3d19ec6a43c6734, 19419faf58dfe5bcc8a9e60e622976c5f8e3ddc1 |
| Linux/Linuxgeneric | 4.17 | Not reported |
| Linux/Linuxgeneric | >=9f4ca05827a27ec73bf63a42732f1978b8a779af <213ff02ab26a4543ef02b4db393bbdd5fa5679a7 || >=9f4ca05827a27ec73bf63a42732f1978b8a779af <0d867b91598b6ed2f75998c34f4e2869631da31e || >=9f4ca05827a27ec73bf63a42732f1978b8a779af <2294b62eaec6fd3c76a261d287f66641eeafd5f0 || >=9f4ca05827a27ec73bf63a42732f1978b8a779af <d870102b5425390cab42eebbf3d19ec6a43c6734 || >=9f4ca05827a27ec73bf63a42732f1978b8a779af <19419faf58dfe5bcc8a9e60e622976c5f8e3ddc1 | 213ff02ab26a4543ef02b4db393bbdd5fa5679a7, 0d867b91598b6ed2f75998c34f4e2869631da31e, 2294b62eaec6fd3c76a261d287f66641eeafd5f0, d870102b5425390cab42eebbf3d19ec6a43c6734, 19419faf58dfe5bcc8a9e60e622976c5f8e3ddc1 |
Published upstream
Oct 18, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 21, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 18, 2026
In the Linux kernel, the following vulnerability has been resolved: net: bcmgenet: fix NULL dereference in set_coalesce before first open The Rx ring priv and index are only set in bcmgenet_init_rx_ring(), which runs at open. Setting the Rx coalescing parameters on an interface that was never opened, e.g. "ethtool -C eth0 rx-usecs 50", dereferences a NULL ring->priv. The oops happens with RTNL held, so networking stays stuck until a reboot: Unable to handle kernel paging request at virtual address 0000000000002788 pc : bcmgenet_set_rx_coalesce.isra.0+0x10/0x88 lr : bcmgenet_set_coalesce+0xe8/0x180 Call trace: bcmgenet_set_rx_coalesce.isra.0+0x10/0x88 (P) __ethnl_set_coalesce.isra.0+0x490/0x570 ethnl_set_coalesce+0x48/0xc0 ethnl_default_set_doit+0xf4/0x230 genl_family_rcv_msg_doit+0xe8/0x160 genl_rcv_msg+0x220/0x2a0 netlink_rcv_skb+0x68/0x140 genl_rcv+0x40/0x60 netlink_unicast+0x338/0x3c0 netlink_sendmsg+0x19c/0x3f8 __sock_sendmsg+0x64/0xc0 __sys_sendto+0x124/0x198 __arm64_sys_sendto+0x30/0x48 Set priv and index at probe. Writing the registers while the interface is down is harmless because open resets the MAC and bcmgenet_init_rx_coalesce() reapplies the stored values. It was observed on a Raspberry Pi CM4, but should apply to all other genet devices.
Quoted source text, attributed separately from HOL analysis.