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NVD / CVE Program· CNA Linux

CVE-2026-92485: bpf: Fix WARNING in bpf_tracing_link_release

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 094f0a895cf97a993d06d5dc4c12e7cb7da845a5, 1757598b3804f7cb35b5b5e02558f6d8b9c2f254, 48a0209d8da0d90a7b0a0db19d1ff88027b13781.

Low priority for now. Upgrade to Linux Linux 094f0a895cf97a993d06d5dc4c12e7cb7da845a5, 1757598b3804f7cb35b5b5e02558f6d8b9c2f254, 48a0209d8da0d90a7b0a0db19d1ff88027b13781 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: bpf: Fix WARNING in bpf_tracing_link_release The trampoline could be corrupted by the blindly 'tr->flags = BPF_TRAMP_F_TAIL_CALL_CTX' in verifier. 1. A fexit attached to a tail_call_reachable prog. 'tr->flags' became 'BPF_TRAMP_F_CALL_ORIG | BPF_TRAMP_F_TAIL_CALL_CTX'. And, the trampoline would poke the target prog's nop insn using jmp insn instead of call insn. 2. Another fexit loaded with the same tail_call_reachable prog target. 'tr->flags' became 'BPF_TRAMP_F_TAIL_CALL_CTX'. 3. Close the first fexit link. Due to no BPF_TRAMP_F_CALL_ORIG in 'tr->flags', the trampoline will fail to restore the prog's nop insn using call insn. [ 3.410719] WARNING: kernel/bpf/syscall.c:3551 at bpf_tracing_link_release+0x53/0x60, CPU#1: test_progs/98 ... [ 3.428793] bpf_link_free+0x58/0x130 [ 3.429293] bpf_link_release+0x23/0x30 Fix the warning by updating 'tr->flags' with '|=' and lock.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Sep 17, 2026
Updated
Oct 30, 2026
EPSS
0.1% · 7th percentile
CWE
—

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CNA vs NVD score

NVD
—
CNA · Linux
7.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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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

    • 028480eaf2a1401e914a1fa1a4a21d877cf0ae30, 6.7affected
    • 605c8d8f9966fcd2f0b858fabebe416fc83f2209 and later · before 1757598b3804f7cb35b5b5e02558f6d8b9c2f254affected · git
    • 8f873cc3f67f2257493063e57d0caf07ef889ee9 and later · before a5c6316052f0ff1467221ecf2996cbab0a496b1eaffected · git
    • 2b5dcb31a19a2e0acd869b12c9db9b2d696ef544 and later · before d02035c5eb4955616efc5c6dbe3d98f19d798cb2affected · git
    • 2b5dcb31a19a2e0acd869b12c9db9b2d696ef544 and later · before 094f0a895cf97a993d06d5dc4c12e7cb7da845a5affected · git
    • 2b5dcb31a19a2e0acd869b12c9db9b2d696ef544 and later · before 48a0209d8da0d90a7b0a0db19d1ff88027b13781affected · git
    • 2b5dcb31a19a2e0acd869b12c9db9b2d696ef544 and later · before 61aaa8782bec59ecffd22e030f54ef9351bcabf9affected · git
    • 6.1.72 and later · before 6.1.191affected · semver
    • 6.6.2 and later · before 6.6.160affected · semver
    • 6.5.12 and later · before 6.6affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:13linuxbefore 6.12.115-26.12.115-2
Debian:14linuxbefore 7.2.6-17.2.6-1

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-2026-92483Sep 17, 2026 · liveupdate: Remember FLB retrieve() status
    0Monitor
  • ← EarlierCVE-2026-92484Sep 17, 2026 · cxl/region: Fix use-after-free in find_pos_and_ways() error path
    0Monitor
  • Later →CVE-2026-92486Sep 17, 2026 · bpf: Fix CFI mismatch in task work callback
    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 Linux094f0a895cf97a993d06d5dc4c12e7cb7da845a5Vendor (CNA)
Linux Linux1757598b3804f7cb35b5b5e02558f6d8b9c2f254Vendor (CNA)
Linux Linux48a0209d8da0d90a7b0a0db19d1ff88027b13781Vendor (CNA)
Linux Linux6.1.191Vendor (CNA)
Linux Linux6.6Vendor (CNA)
Linux Linux6.6.160Vendor (CNA)
Linux Linux61aaa8782bec59ecffd22e030f54ef9351bcabf9Vendor (CNA)
Linux Linuxa5c6316052f0ff1467221ecf2996cbab0a496b1eVendor (CNA)
Linux Linuxd02035c5eb4955616efc5c6dbe3d98f19d798cb2Vendor (CNA)
debian:linux6.12.115-2 · Debian:13Package registry (OSV)
debian:linux7.2.6-1 · Debian:14Package 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.

No dated events beyond publication.

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

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

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. Fix✗ → ✓

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

References

Show all references (5 more)

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

All records