Unknown

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

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.

Published Oct 14, 2026 · Updated Oct 14, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP · CNA: Linux

Low

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.

How the score was calculated

EPSS 0.2% (30-day exploitation probability)+2

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation

Not confirmed

Not in CISA KEV — an absence of record, not proof it is unexploited.

EPSS FIRST

0.22%

ahead of 12% of scored CVEs · Oct 15, 2026

Affects

Linux

CVSS base

—

Score not published yet.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
No fix documented in the sources: reduce exposure and monitor the vendor advisory.
Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

Vendor	Product	Versions	Status	Source
Linux	Linux	≥ 683703a26e4677db437a1480682851e27c7a154f and < caf09c09e0f323015ab6777ed1bad5aa10688631≥ 683703a26e4677db437a1480682851e27c7a154f and < 56b12f0cd476e4d90a0e2663a80102b388ebf78c≥ 683703a26e4677db437a1480682851e27c7a154f and < 88d640efd655b10f9fa4e381caf777da1f17c2a6≥ 683703a26e4677db437a1480682851e27c7a154f and < d54a044136b129822715e8798899af540ec7a9e9≥ 683703a26e4677db437a1480682851e27c7a154f and < 8a04047c6dbff2f49a561b1ff53b043f4807e855≥ 683703a26e4677db437a1480682851e27c7a154f and < 530ae0a1458078c7a81fbffd9ff17d42129364d9≥ 683703a26e4677db437a1480682851e27c7a154f and < 03b672eba4937ff18337049824a114012d57f202≥ 683703a26e4677db437a1480682851e27c7a154f and < 439f392084f8f7f59ab9d47a9579185accefe1d8 and 1 more version 2.6.31	Vulnerable	CVE Program (cve.org) e CISA ADP

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

Not enough vector or weakness data: use the affected application’s logs as a starting point.

application logs

Timeline

What happened to this CVE, newest first.

2026
Record published
Oct 14, 2026
Affected products added · linux/linux
Oct 14, 2026 · CVE Program (cve.org) e CISA ADP
Source status changed · → Received
Oct 14, 2026 · NIST National Vulnerability Database
Record created in this database
Oct 14, 2026 · Alertas do Telegram
CVE published
Oct 14, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

1× References added · Oct 14, 2026 – Oct 14, 2026
1× Official description updated · Oct 14, 2026 – Oct 14, 2026

References

8 on the record

git.kernel.org/stable/c/03b672eba4937ff18337049824a114012d57f202
NIST National Vulnerability Database
git.kernel.org/stable/c/d54a044136b129822715e8798899af540ec7a9e9
NIST National Vulnerability Database
git.kernel.org/stable/c/439f392084f8f7f59ab9d47a9579185accefe1d8
NIST National Vulnerability Database
git.kernel.org/stable/c/caf09c09e0f323015ab6777ed1bad5aa10688631
NIST National Vulnerability Database
git.kernel.org/stable/c/8a04047c6dbff2f49a561b1ff53b043f4807e855
NIST National Vulnerability Database
git.kernel.org/stable/c/530ae0a1458078c7a81fbffd9ff17d42129364d9
NIST National Vulnerability Database
git.kernel.org/stable/c/56b12f0cd476e4d90a0e2663a80102b388ebf78c
NIST National Vulnerability Database
git.kernel.org/stable/c/88d640efd655b10f9fa4e381caf777da1f17c2a6
NIST National Vulnerability Database

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 1d
Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 1d
Unknown CVE-2026-98424 wifi: cfg80211: undo netns switch if renaming the wiphy fails 1d
Unknown CVE-2026-98425 wifi: mac80211: don't warn when an IBSS has no channel to scan 1d
Unknown CVE-2026-98426 wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path 1d
Unknown CVE-2026-98427 net/sched: codel: bound the dropping loop per dequeue call 1d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

No CVSS score published by NVD, the CNA, CISA or GitHub so far.
No fixed version, patch or mitigation documented.
No CISA SSVC assessment.
No CWE classification.
No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-98419 is "drop_monitor: fix out-of-bounds write in reset_per_cpu_data()", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.22% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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