CVE-2026-45899
CVE-2026-45899 is a medium-severity vulnerability in Linux Linux Kernel with a CVSS 3.x base score of 5.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.
Key facts
- Severity: Medium (CVSS 3.x base score 5.5)
- EPSS exploit prediction: 0% (6th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-32365
- Affected product: Linux Linux Kernel
- Published:
- Last modified:
Description
In the Linux kernel, the following vulnerability has been resolved: ext4: drop extent cache when splitting extent fails When the split extent fails, we might leave some extents still being processed and return an error directly, which will result in stale extent entries remaining in the extent status tree. So drop all of the remaining potentially stale extents if the splitting fails.
Frequently asked questions
- What is CVE-2026-45899?
- In the Linux kernel, the following vulnerability has been resolved: ext4: drop extent cache when splitting extent fails When the split extent fails, we might leave some extents still being processed and return an error directly, which will result in stale extent entries remaining in the extent status tree. So drop all of the remaining potentially stale extents if the splitting fails.
- How severe is CVE-2026-45899?
- CVE-2026-45899 has a CVSS 3.x base score of 5.5, rated medium severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2026-45899 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (6th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-45899?
- CVE-2026-45899 affects Linux Linux Kernel. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-45899?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
- Does CVE-2026-45899 have an EU (EUVD) identifier?
- Yes. CVE-2026-45899 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32365.
- When was CVE-2026-45899 published?
- CVE-2026-45899 was published on 2026-05-27 and last updated on 2026-06-25.
References
- https://git.kernel.org/stable/c/120c6bd7ca9d3e80a968b758cbb3fbd67570f132
- https://git.kernel.org/stable/c/31bf37cf53ede8145e2bc62da803d4506da92975
- https://git.kernel.org/stable/c/337506dc652383c80839edb8d8dcdd8ff2129b4f
- https://git.kernel.org/stable/c/6e54f8dfee359bbd58086c883ea8cffd5312999d
- https://git.kernel.org/stable/c/79b592e8f1b435796cbc2722190368e3e8ffd7a1
- https://git.kernel.org/stable/c/808f3191498f300174523c54cab101e18795ae4e
- https://git.kernel.org/stable/c/dc7c9b9d03a59a7fe483574531327e650a4b4adc
Affected products (1)
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
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