CVE-2026-98262: linux

CVSS: UnknownReceived
AliasesUBUNTU-CVE-2026-98262DEBIAN-CVE-2026-98262
Published 06-10-2026Last modified 19-10-2026
Open JSON

Vulnerability summary

CVE-2026-98262 is a vulnerability in linux with no CVSS score yet. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 7.6% 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
0.18%
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: ata: libahci: clear PxCLBU and PxFBU for AHCI_HFLAG_32BIT_ONLY A user reported that commit 105c42566a55 ("ata: ahci: force 32-bit DMA for JMicron JMB582/JMB585") made the JMicron JMB585 unusable on his board. The failure is seen as soon as the ahci driver is probed, and booting with iommu=off does not solve the problem. Looking at the AHCI specification, PxCLBU and PxFBU are both read only '0' for HBAs that do not support 64-bit addressing. For HBAs that do support 64-bit addressing, the registers are read write, with a reset value that is Implementation Specific. When using the AHCI_HFLAG_32BIT_ONLY flag, the HBA does support 64-bit addressing, and a 32-bit DMA mask is set by simply clearing HOST_CAP_64. Thus, in this case, we need to explicitly clear the registers to 0.

CVSS metrics

Risk metrics not yet published.

EPSS trend

Probability

0.18%

Chance of exploitation in the next 30 days

Percentile

8%

Versus all other CVEs

30-day change

Change unavailable

Change unavailable

06-10-202621-10-2026
EPSS score
0.18%

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)
Debian1 product
  • linuxAll versions (No fix recorded) | < 6.1.190-1 | < 6.12.113-1 | < 7.2.8-1
Linux1 product
  • linux≥ c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c, < 0191c9ff23ef1678dbfb5ad253a2dee92feb5d71 | ≥ c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c, < 8f510f68208a1f673d7c7234a687be4671490e9c | ≥ c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c, < 4719424bb7cb9f20b73986bcb72dd528f0e5c6eb | ≥ c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c, < a5a8b4737f68bbac8aa0685af0c8921e6003c22b | ≥ c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c, < b28a17d4a9bb0aa38b48681c3927b012ba40eabe | ≥ c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c, < b691a3e244278362e552439d6d3ee5a5d3703488 | ≥ c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c, < 7912ad8fb5233bb8cfe21d50df639c7f4854ff9d | ≥ c7a42156d99bcea7f8173ba7a6034bbaa2ecb77c, < 82e47533221d4746947b74d2e79a478c36c6433a | 2.6.22

3 vendors · 171 products

References

12 links
Show all 12 references