CVE Intelligence
Unknown

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

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.

Published Sep 4, 2026 · Updated Oct 19, 2026 · Sources: NIST National Vulnerability Database, CVE Program (cve.org) e CISA ADP, GitHub Security Advisories · CNA: Linux

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • EPSS 0.2% (30-day exploitation probability)+1

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
0.2%
ahead of 9% of scored CVEs · Oct 27, 2026
Affects
Linux
Linux
CVSS base
—
Score not published yet.

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
  2. No fix documented in the sources: reduce exposure and monitor the vendor advisory.
  3. Search available logs for exploit probes, errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Linux Linux ≥ c84760659dcf237902d4cc997cd5f55cb3b2807f and < 0f82586741e39926542f621bafa424e237a04fa4≥ c84760659dcf237902d4cc997cd5f55cb3b2807f and < 134d82a2b5e3eba3ebf58753a1387b22f26ca1de≥ c84760659dcf237902d4cc997cd5f55cb3b2807f and < 03a12253dd2a036545bdb0110a4e0b8dc70f8e7c≥ c84760659dcf237902d4cc997cd5f55cb3b2807f and < e99120b5944a16d0bc27e52b33de78bcdaaabf5c≥ c84760659dcf237902d4cc997cd5f55cb3b2807f and < 98a42bb9d60d42898c3494de351a1bf508348cde≥ c84760659dcf237902d4cc997cd5f55cb3b2807f and < 184c1a80421a5b5ddcd262e47980ce2e67fee211≥ c84760659dcf237902d4cc997cd5f55cb3b2807f and < 9f92e749fc08b7ff3d9da190c4d1b2273745b282≥ c84760659dcf237902d4cc997cd5f55cb3b2807f and < c35da2bac6f7cb9a9be73f188b4fcc324615c327
and 2 more ≥ c84760659dcf237902d4cc997cd5f55cb3b2807f and < b7eea80be25f3334f131d52982b3131aba77b97dversion 5.5
Vulnerable CVE Program (cve.org) e CISA ADP

EPSS over time FIRST

Oct 15, 2026 → Oct 27, 2026 · 12 reading(s) · max 0.20%

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Not enough vector or weakness data: use the affected application’s logs as a starting point.
application logs

Timeline

What happened to this CVE, newest first.

  • 2026
  • Record published
    Oct 15, 2026
  • Affected products added · linux/linux
    Oct 15, 2026 · CVE Program (cve.org) e CISA ADP
  • Source status changed · → Received
    Oct 15, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 15, 2026 · NIST National Vulnerability Database
  • CVE published
    Sep 4, 2026 · Linux

Source activity

Repeated readings are counted rather than listed.

  • 1× References added · Oct 19, 2026 – Oct 19, 2026
  • 1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

11 on the record

Elsewhere on this site

Linux
every CVE for this vendor

Related CVEs (same products)

  • CVE-2026-99216 Drivers: hv: Don't reset VMBus connection state on error/exit paths 8h
  • CVE-2026-99215 power: supply: core: prevent unregistering a power supply while a callback runs 8h
  • CVE-2026-99207 scsi: target: Disable interrupts while holding delayed_cmd_lock 8h
  • CVE-2026-99208 drm/xe/oa: Zero OA buffer at allocation 8h
  • CVE-2026-99209 drm/xe: skip eviction of a BO with no resource 8h
  • CVE-2026-99210 accel/rocket: clear rdev on device init failure 8h

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No CVSS score published by NVD, the CNA, CISA or GitHub so far.
  • No fixed version, patch or mitigation documented.
  • No CISA SSVC assessment.
  • No CWE classification.
  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-80805 is "xfs: validate attr entry pointer before field access", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.20% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

Comments

Moderated technical discussion. Read the community guidelines.

No comments yet.

Sign in or create an account to comment and suggest corrections.