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CVE-2026-98419

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

No known exploitation. EPSS puts it in the 12th percentile. Fixed versions are out.

CVSS —Not scoredEPSS percentile12th0.2% chance in 30 daysCISA KEVNot listedNo confirmed exploitation
No public exploit knownFix1 product4 fixed builds listed below

Published Updated Sources: CVE.org, NVD

NVD CVE.org

What to do

Find your product and version, then upgrade to the build on the right.

  • LinuxAffected: ≥ 683703a26e4677db437a1480682851e27c7a154f, < caf09c09e0f323015ab6777ed1bad5aa10688631Upgrade to: caf09c09e0f323015ab6777ed1bad5aa10688631Affected: ≥ 683703a26e4677db437a1480682851e27c7a154f, < 56b12f0cd476e4d90a0e2663a80102b388ebf78cUpgrade to: 56b12f0cd476e4d90a0e2663a80102b388ebf78cAffected: ≥ 683703a26e4677db437a1480682851e27c7a154f, < 88d640efd655b10f9fa4e381caf777da1f17c2a6Upgrade to: 88d640efd655b10f9fa4e381caf777da1f17c2a6Affected: ≥ 683703a26e4677db437a1480682851e27c7a154f, < d54a044136b129822715e8798899af540ec7a9e9Upgrade to: d54a044136b129822715e8798899af540ec7a9e9 + 4 more branchesStated by: CVE record

Versions as the sources state them. Full version matrix after sign-in

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What it is

From the CVE record

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.

In plain language

No plain-language summary for this CVE yet.

Exploitation

Where each signal puts this CVE on the scale from published to confirmed exploited.

EPSS12th
CISA KEV

Not in the catalog. CISA has not confirmed exploitation.

Public exploits

No public exploit or proof of concept found in the sources we track.

EPSS

0.2% chance of exploitation activity in the next 30 days, which ranks it in the 12th percentile of scored CVEs.

Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.

Lifecycle

4 events over 8 days, from the signal feeds we watch.

  1. OpenVAS check added
  2. Record updated
  3. Publishedrecord updated

Affected products

Sources

References in the record

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