High 7.0Published Oct 14, 2026

CVE-2026-98419drop_monitor: fix out-of-bounds write in reset_per_cpu_data()

Updated under an hour ago (Oct 27, 2026, 1:20 AM ET)

Does this affect you?

It affects Linux. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.22%, higher than 12% of scored CVEs.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Linux

Exploited in the last 30 days

In the Linux kernel, the following vulnerability has been resolved: drop_monitor: fix out-of-bounds write in reset_per_cpu_data() In reset_per_cpu_data(), al is computed as: al = sizeof(struct net_dm_alert_msg); al += dm_hit_limit * sizeof(struct net_dm_drop_point); al += sizeof(struct nlattr); skb = genlmsg_new(al, GFP_KERNEL); ... nla = nla_reserve(skb, NLA_UNSPEC, sizeof(struct net_dm_alert_msg)); ... msg = nla_data(nla); memset(msg, 0, al); Because al includes sizeof(struct nlattr) (the 4-byte attribute header), genlmsg_new() allocates al bytes of tailroom starting at nla. However, msg points to nla_data(nla), which is located sizeof(struct nlattr) bytes past nla. Calling memset(msg, 0, al) therefore writes al bytes starting from msg, exceeding the allocated buffer by sizeof(struct nlattr) (4 bytes) and corrupting skb_shared_info. Fix this by letting al represent only the payload length, allocating the skb with genlmsg_new(nla_total_size(al), GFP_KERNEL), and zeroing al bytes from msg.

CVSS: 7.0 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.22% (percentile 12)
Assigned by: Linux
NVD analysis: Received
Record last updated: Oct 24, 2026
First seen by InfoSec Signals: Oct 14, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 683703a26e4677db437a1480682851e27c7a154f before caf09c09e0f323015ab6777ed1bad5aa10688631; 683703a26e4677db437a1480682851e27c7a154f builds before 56b12f0cd476e4d90a0e2663a80102b388ebf78c; 683703a26e4677db437a1480682851e27c7a154f builds before 88d640efd655b10f9fa4e381caf777da1f17c2a6; from 683703a26e4677db437a1480682851e27c7a154f before d54a044136b129822715e8798899af540ec7a9e9; 683703a26e4677db437a1480682851e27c7a154f builds before 8a04047c6dbff2f49a561b1ff53b043f4807e855; 683703a26e4677db437a1480682851e27c7a154f builds before 530ae0a1458078c7a81fbffd9ff17d42129364d9; 683703a26e4677db437a1480682851e27c7a154f builds before 03b672eba4937ff18337049824a114012d57f202; 683703a26e4677db437a1480682851e27c7a154f builds before 439f392084f8f7f59ab9d47a9579185accefe1d8	CNA record

References

References

https://git.kernel.org/stable/c/caf09c09e0f323015ab6777ed1bad5aa10688631
https://git.kernel.org/stable/c/56b12f0cd476e4d90a0e2663a80102b388ebf78c
https://git.kernel.org/stable/c/88d640efd655b10f9fa4e381caf777da1f17c2a6
https://git.kernel.org/stable/c/d54a044136b129822715e8798899af540ec7a9e9
https://git.kernel.org/stable/c/8a04047c6dbff2f49a561b1ff53b043f4807e855
https://git.kernel.org/stable/c/530ae0a1458078c7a81fbffd9ff17d42129364d9
https://git.kernel.org/stable/c/03b672eba4937ff18337049824a114012d57f202
https://git.kernel.org/stable/c/439f392084f8f7f59ab9d47a9579185accefe1d8

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.