drop_monitor: perform u64_stats updates under IRQ-disabled section
In the Linux kernel, the following vulnerability has been resolved: drop_monitor: perform u64_stats updates under IRQ-disabled section In net_dm_packet_trace_kfree_skb_hit() and net_dm_hw_trap_packet_probe(), u64_stats_update_begin() / u64_stats_inc() / u64_stats_update_end() were called after spin_unlock_irqrestore(&...drop_queue.lock, flags), when local IRQs had already been re-enabled. Tracepoint probes can execute in IRQ or softirq context. On 32-bit architectures, u64_stats_update_begin() disables preemption but not interrupts, relying on seqcount writes. If a nested interrupt occurs on the same CPU during the 64-bit stats update, the reentrant seqcount update can corrupt the seqcount state or stats value. Fix this by performing the 64-bit per-CPU stats update before releasing drop_queue.lock via spin_unlock_irqrestore(), ensuring local interrupts remain disabled during the u64_stats update.
CVE-2026-68286
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-68286
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "e9feb58020f952f7d9de785ede9a7d54ab1eda5c",
"lessThan": "dd8472526a04f2185afd792b8041a912a7d75d85",
"versionType": "git"
},
{
"status": "affected",
"version": "e9feb58020f952f7d9de785ede9a7d54ab1eda5c",
"lessThan": "3454c729ee8aa682ec871f1b174b047f731933ae",
"versionType": "git"
},
{
"status": "affected",
"version": "e9feb58020f952f7d9de785ede9a7d54ab1eda5c",
"lessThan": "be9b121894d6ad44f0011f79543a2e3245979497",
"versionType": "git"
},
{
"status": "affected",
"version": "e9feb58020f952f7d9de785ede9a7d54ab1eda5c",
"lessThan": "7d857cf5f0120bb0e020fa20b03bd21b9d3e0c04",
"versionType": "git"
},
{
"status": "affected",
"version": "e9feb58020f952f7d9de785ede9a7d54ab1eda5c",
"lessThan": "d5e2cd2bc8ae36617346b3a54ee9da61d866bf92",
"versionType": "git"
},
{
"status": "affected",
"version": "e9feb58020f952f7d9de785ede9a7d54ab1eda5c",
"lessThan": "fd098a23bf8fda7eae48db9b06e7c34fc4d228fa",
"versionType": "git"
}
],
"programFiles": [
"net/core/drop_monitor.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.189",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.111",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.53",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/core/drop_monitor.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-68286
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #8246 · Revision 1
- Added to Heist Feed
- Publisher date