CVE-2026-80807: linux

CVSS: UnknownReceived
AliasesUBUNTU-CVE-2026-80807DEBIAN-CVE-2026-80807
Published 04-09-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-80807 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.20% chance of exploitation in the next 30 days, higher than 9.4% 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
0.20%
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: nilfs2: reject invalid block index in GC ioctl Syzbot reported list corruption caused by a double list_add_tail() call on bh->b_assoc_buffers within nilfs_lookup_dirty_data_buffers(). Analysis revealed that the root cause was the insertion of a page/folio with a page index of ULONG_MAX into the page cache via the GC ioctl. filemap_get_folios_tag(), called by nilfs_lookup_dirty_data_buffers(), repeatedly detects a dirty folio with a page index of ULONG_MAX due to index wrap-around, leading to duplicate processing of dirty buffers. As a preparatory step, the GC ioctl loads the page/folio of the block to be moved during GC and inserts it into the page cache based on information in the nilfs_vdesc structure passed as an argument. Normally, this does not cause issues because the user-space GC library configures the nilfs_vdesc structure properly. However, since there is no range check on the parameters determining the page index, a request with artificially crafted parameters -- such as those generated by Syzbot -- can result in a page/folio being inserted with a page index of ULONG_MAX, triggering the above problem. This resolves the issue by checking the ranges of 'vd_offset' and 'vd_vblocknr' in the nilfs_vdesc structure that determine the page index, thereby preventing the invalid page/folio insertions.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.20%

Chance of exploitation in the next 30 days

Percentile

9%

Versus all other CVEs

30-day change

0.00 pp

From 0.20% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.20%

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

Ubuntu169 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 | < 7.1.12-1
  • linux-6.12< 6.12.111-1~deb12u1
Linux1 product
  • linux≥ 7942b919f7321f95a777d396ff7894a7a83dc9b0, < 898404cdf882d7b54f1132f75570984ca3214796 | ≥ 7942b919f7321f95a777d396ff7894a7a83dc9b0, < ba8a8b563a28d358c45c62a306d421434a058648 | ≥ 7942b919f7321f95a777d396ff7894a7a83dc9b0, < 3bd064ccc70b85f9a3d53aece29dc8473be5a226 | ≥ 7942b919f7321f95a777d396ff7894a7a83dc9b0, < a5e776e2937581d67ec5b9b4d27b0f70d7baa6b1 | ≥ 7942b919f7321f95a777d396ff7894a7a83dc9b0, < 68aa9ab6f8f2895713aa6ddf781463ed8ea5ba44 | ≥ 7942b919f7321f95a777d396ff7894a7a83dc9b0, < e447f7edb99bd00cec63d6f3049e2e5074946f71 | ≥ 7942b919f7321f95a777d396ff7894a7a83dc9b0, < ec6ddf271dfa4c7e3147bc2c8b2bad4315f316a1 | ≥ 7942b919f7321f95a777d396ff7894a7a83dc9b0, < fbcfb75c20d71a5b542ad4ac3b79d10b997c8152 | ≥ 7942b919f7321f95a777d396ff7894a7a83dc9b0, < a1735eae55448bc79c2da6593455791e886f6ed8 | 2.6.30

3 vendors · 172 products

References

13 links
Show all 13 references