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NVD / CVE Program· CNA Linux

CVE-2026-80805: xfs: validate attr entry pointer before field access

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: 0.19% (FIRST EPSS).
  • Fixed version: Linux Linux 03a12253dd2a036545bdb0110a4e0b8dc70f8e7c, 0f82586741e39926542f621bafa424e237a04fa4, 134d82a2b5e3eba3ebf58753a1387b22f26ca1de; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1.

Low priority for now. Upgrade to Linux Linux 03a12253dd2a036545bdb0110a4e0b8dc70f8e7c, 0f82586741e39926542f621bafa424e237a04fa4, 134d82a2b5e3eba3ebf58753a1387b22f26ca1de; azl3 kernel 6.6.152.1-1 on Azure Linux 3.0 6.6.157.1-1 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: xfs: validate attr entry pointer before field access xfs_attr3_leaf_verify_entry() accesses lentry/rentry fields (namelen, valuelen) before checking if the entry pointer itself is within bounds. If nameidx is crafted to point near the end of the buffer, these field accesses can read out-of-bounds before the bounds check at name_end > buf_end is performed. Add explicit bounds checks for entry pointers before accessing their fields. Use offsetof() to check that the start of the flexible array member (nameval/name) is within bounds, which ensures all preceding fields are safe to access.

—No exploit Fix available
Published
Sep 4, 2026
Updated
Nov 6, 2026
EPSS
0.1% · 9th 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%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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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

    • 5.5affected
    • c84760659dcf237902d4cc997cd5f55cb3b2807f and later · before 0f82586741e39926542f621bafa424e237a04fa4affected · git
    • c84760659dcf237902d4cc997cd5f55cb3b2807f and later · before 134d82a2b5e3eba3ebf58753a1387b22f26ca1deaffected · git
    • c84760659dcf237902d4cc997cd5f55cb3b2807f and later · before 03a12253dd2a036545bdb0110a4e0b8dc70f8e7caffected · git
    • c84760659dcf237902d4cc997cd5f55cb3b2807f and later · before e99120b5944a16d0bc27e52b33de78bcdaaabf5caffected · git
    • c84760659dcf237902d4cc997cd5f55cb3b2807f and later · before 98a42bb9d60d42898c3494de351a1bf508348cdeaffected · git
    • c84760659dcf237902d4cc997cd5f55cb3b2807f and later · before 184c1a80421a5b5ddcd262e47980ce2e67fee211affected · git
    • c84760659dcf237902d4cc997cd5f55cb3b2807f and later · before 9f92e749fc08b7ff3d9da190c4d1b2273745b282affected · git
    • c84760659dcf237902d4cc997cd5f55cb3b2807f and later · before c35da2bac6f7cb9a9be73f188b4fcc324615c327affected · git
    • c84760659dcf237902d4cc997cd5f55cb3b2807f and later · before b7eea80be25f3334f131d52982b3131aba77b97daffected · git

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.187-16.1.187-1
Debian:12linux-6.12before 6.12.107-1~deb12u16.12.107-1~deb12u1
Debian:13linuxbefore 6.12.107-16.12.107-1
Debian:14linuxbefore 7.1.12-17.1.12-1

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-2026-80803Sep 4, 2026 · nfc: digital: clamp SENSF_RES length to the destination buffer
    0Monitor
  • ← EarlierCVE-2026-80804Sep 4, 2026 · xfs: restore nofs context unconditionally in xfs_trans_roll
    0Monitor
  • Later →CVE-2026-80806Sep 4, 2026 · ext4: don't enable DAX on new encrypted files
    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 Linux03a12253dd2a036545bdb0110a4e0b8dc70f8e7cVendor (CNA)
Linux Linux0f82586741e39926542f621bafa424e237a04fa4Vendor (CNA)
Linux Linux134d82a2b5e3eba3ebf58753a1387b22f26ca1deVendor (CNA)
Linux Linux184c1a80421a5b5ddcd262e47980ce2e67fee211Vendor (CNA)
Linux Linux98a42bb9d60d42898c3494de351a1bf508348cdeVendor (CNA)
Linux Linux9f92e749fc08b7ff3d9da190c4d1b2273745b282Vendor (CNA)
Linux Linuxb7eea80be25f3334f131d52982b3131aba77b97dVendor (CNA)
Linux Linuxc35da2bac6f7cb9a9be73f188b4fcc324615c327Vendor (CNA)
Linux Linuxe99120b5944a16d0bc27e52b33de78bcdaaabf5cVendor (CNA)
azl3 kernel 6.6.150.1-1 on Azure Linux 3.0—Microsoft (MSRC)
azl3 kernel 6.6.152.1-1 on Azure Linux 3.06.6.157.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.187-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.107-1~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.

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

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. SSVC exploitation— → none
  2. Fix✗ → ✓

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

References

Show all references (8 more)

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

All records