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CVE.org (no NVD analysis yet)· CNA Linux

CVE-2026-98790: perf: Fix race between perf_event_exit_task() and perf_pending_task()

Noroxi assessment

Priority: Monitor (action score 0/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 524063fea29f8a841e49927ea7a8085194ad3ec2, 655acfa713bce9ae9c81a654459890c2f58cb4e8, 672b8a9ce8f51b991481dfde26fba5cc4340a91a; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 Release Notes.

Low priority for now. Upgrade to Linux Linux 524063fea29f8a841e49927ea7a8085194ad3ec2, 655acfa713bce9ae9c81a654459890c2f58cb4e8, 672b8a9ce8f51b991481dfde26fba5cc4340a91a; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 Release Notes or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: perf: Fix race between perf_event_exit_task() and perf_pending_task() A race condition exists between perf_event_exit_task() and perf_pending_task() during begin_new_exec(). During begin_new_exec(), perf_event_exit_task() may be called, and the PF_EXITING flag is not set on task. So perf_sigtrap() continues to execute and triggers WARN_ON_ONCE(event->ctx->task != current). Since both task exit and exec paths can call perf_event_exit_task() which sets ctx->task to TASK_TOMBSTONE, fix this by explicitly checking if event->ctx->task equals TASK_TOMBSTONE and dropping the redundant PF_EXITING check.

—No exploit Fix available
Published
Oct 18, 2026
Updated
Oct 30, 2026
EPSS
0.1% · 6th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

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  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

—

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 5.13affected
    • 97ba62b278674293762c3d91f724f1bb922f04e0 and later · before 6e454fbe3e646d119ab75e907035950e0e857c09affected · git
    • 97ba62b278674293762c3d91f724f1bb922f04e0 and later · before a8a6fe5601fa2d2c0fbfb3e531a1063f73c1eae3affected · git
    • 97ba62b278674293762c3d91f724f1bb922f04e0 and later · before 655acfa713bce9ae9c81a654459890c2f58cb4e8affected · git
    • 97ba62b278674293762c3d91f724f1bb922f04e0 and later · before 672b8a9ce8f51b991481dfde26fba5cc4340a91aaffected · git
    • 97ba62b278674293762c3d91f724f1bb922f04e0 and later · before 524063fea29f8a841e49927ea7a8085194ad3ec2affected · git
    • 97ba62b278674293762c3d91f724f1bb922f04e0 and later · before 81e61e3f8befa1bae3ec8e779d8ada5e5e362c21affected · git
    • 97ba62b278674293762c3d91f724f1bb922f04e0 and later · before ffb684f2aa141eeb0caa6308422e7e05d1ded7c4affected · git
    • before 5.13not affected · semver
    • 5.15.224 and later · up to and including 5.15.*not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:12linux-6.12before 6.12.113-1~deb12u16.12.113-1~deb12u1
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.10-17.2.10-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-98788Oct 18, 2026 · futex: Fix private hash use-after-free on resize
    0Monitor
  • ← EarlierCVE-2026-98789Oct 18, 2026 · bpf: Fix objects stuck in free_by_rcu_ttrace
    0Monitor
  • Later →CVE-2026-98791Oct 18, 2026 · net/mlx5e: Fix AF_XDP TX timestamp teardown NULL dereference
    0Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux524063fea29f8a841e49927ea7a8085194ad3ec2Vendor (CNA)
Linux Linux655acfa713bce9ae9c81a654459890c2f58cb4e8Vendor (CNA)
Linux Linux672b8a9ce8f51b991481dfde26fba5cc4340a91aVendor (CNA)
Linux Linux6e454fbe3e646d119ab75e907035950e0e857c09Vendor (CNA)
Linux Linux81e61e3f8befa1bae3ec8e779d8ada5e5e362c21Vendor (CNA)
Linux Linuxa8a6fe5601fa2d2c0fbfb3e531a1063f73c1eae3Vendor (CNA)
Linux Linuxffb684f2aa141eeb0caa6308422e7e05d1ded7c4Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
azl3 kernel 6.6.159.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
debian:linux6.12.113-1 · Debian:13Package registry (OSV)
debian:linux-6.126.12.113-1~deb12u1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 6, 2026+19 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Exploit maturity— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (6 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records