8.1

CVE-2026-98261: linux

CVSS: 8.1v3.1HighReceived
AliasesUBUNTU-CVE-2026-98261DEBIAN-CVE-2026-98261
Published 06-10-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-98261 is a high (CVSS 8.1) vulnerability in linux. EPSS estimates a 0.44% chance of exploitation in the next 30 days, higher than 37.1% of scored vulnerabilities.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.44%
0%100%
Low · Change unavailable
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 1 · Related 1
OPENSUSE-SU-2026:12131-1

Timeline

  1. 06-10-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: cifs: Fix server use-after-free in cifs_chan_skip_or_disable() When a secondary channel is no longer supported by the server, cifs_chan_skip_or_disable() drops the channel reference with cifs_put_tcp_session() and then continues to use the server pointer by calling cifs_signal_cifsd_for_reconnect() on it and reading its primary_server pointer. cifs_put_tcp_session() can drop the last reference of the channel and tear it down, so both the channel and the primary server (whose reference is also dropped by cifs_put_tcp_session()) can be freed before they are signaled for reconnect. Signal the channel and the primary server and capture the primary server pointer before dropping the channel reference with cifs_put_tcp_session().

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.44%

Chance of exploitation in the next 30 days

Percentile

37%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

06-10-202621-10-2026
EPSS score
0.44%

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

Ubuntu144 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)
Debian1 product
  • linuxAll versions (No fix recorded) | < 6.12.113-1 | < 7.2.8-1
Linux1 product
  • linux≥ 50e8363ecc85da49764781da90ebffe1a657b370, < 0338489960ddad6368bce55e8adbc176c523093d | ≥ f591062bdbf4742b7f1622173017f19e927057b0, < edd52eae5fcfb8433b6bb0e7cd98db438fe01227 | ≥ f591062bdbf4742b7f1622173017f19e927057b0, < fcc0a935bb6e37ecbf7e4335061309f896f35780 | ≥ f591062bdbf4742b7f1622173017f19e927057b0, < 7a1b27780b113583a94256d58dabfe7c0d9286e7 | ≥ f591062bdbf4742b7f1622173017f19e927057b0, < 717e0a25036b6c92cecace30913b2d874a4c22b8 | d61ba1d71ea6039eca7ada870bf3f0c3c8fc12e4 | ≥ 6.6.15, < 6.6.158 | ≥ 6.7.3, < 6.8 | 6.8

3 vendors · 146 products

References

9 links