CVE-2026-80855: linux

CVSS: UnknownReceived
AliasesUBUNTU-CVE-2026-80855DEBIAN-CVE-2026-80855
Published 04-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-80855 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.17% chance of exploitation in the next 30 days, higher than 5.3% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
Not scored
010
No CVSS score recorded
EPSS score
0.17%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 2 · Related 1
MGASA-2026-0506OPENSUSE-SU-2026:11773-1

Timeline

  1. 04-09-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: fuse: fix invalidate lock leak on open O_TRUNC DAX failure fuse_open() takes filemap_invalidate_lock() for a DAX truncate (dax_truncate = true) and releases it before the out_inode_unlock label. But when fuse_dax_break_layouts() fails, the goto out_inode_unlock skips the unlock and leaks the rwsem, so any later fault or truncate on the file stalls on the stale lock. fuse_dax_break_layouts() can fail with -ERESTARTSYS when a signal interrupts the wait for busy DAX pages to drain: open("file", O_RDWR | O_TRUNC) └─ fuse_open() ├─ filemap_invalidate_lock() # dax_truncate └─ fuse_dax_break_layouts() └─ dax_break_layout() └─ wait_page_idle() # TASK_INTERRUPTIBLE └─ fuse_wait_dax_page() # unlock, schedule, re-lock └─ signal → -ERESTARTSYS goto out_inode_unlock # <- lock leaked Fix this by moving filemap_invalidate_unlock() below the label so that all error paths release the lock, and rename the label to out_unlock as it now covers more than just the inode lock.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.17%

Chance of exploitation in the next 30 days

Percentile

5%

Versus all other CVEs

30-day change

0.00 pp

From 0.17% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.17%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu157 products
  • linuxAll versions (No fix recorded)
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded)
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian2 products
  • linux< 6.1.187-1 | < 6.12.111-1 | < 7.1.13-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux1 product
  • linux≥ d58366aab86854217b81679d1a9dcd54a2edfc2a, < 1b04d80a27d317064cce2307472f5bef9975bc50 | ≥ 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b, < a61524da59a2f5ac9c8de23ff98b30da769ab144 | ≥ 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b, < dcf30a56624c2a0cfab1bada5b1ca8cc0c02f010 | ≥ 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b, < 7288c279ddbd654a06c82118c1a3f5570c1807f0 | ≥ 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b, < 776e85fda752f9a15e0f82dec42ecacd12a9bd94 | ≥ 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b, < 1d3e701cda2f41d48aa721b3ebefbe0fbf8d74da | ≥ 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b, < e981474d7bf1457da12404e169ea147d2c8ecea7 | ≥ 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b, < a927f1867e61b78f39f9da0bbba3c98c2ca151fe | 81775ab858b4236c52c5da7e25cec6e49dd91b46 | b57e150ac2eac791d5d187923b73dc2dafaf67fa | 1fdbbe246daf348adaa0739463384b16ceba1fc0 | ≥ 5.15.109, < 5.15.220 | ≥ 5.10.179, < 5.11 | ≥ 5.18.18, < 5.19 | ≥ 5.19.2, < 5.20 | 6.0

3 vendors · 160 products

References

13 links
Show all 13 references