How severe is CVE-2026-45948?

CVE-2026-45948 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-2026-45948 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-2026-45948?

CVE-2026-45948 primarily affects Linux Linux Kernel. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2026-45948?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-45948 have an EU (EUVD) identifier?

Yes. CVE-2026-45948 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32232.

When was CVE-2026-45948 published?

CVE-2026-45948 was published on 2026-05-27 and last updated on 2026-06-17.

CVE-2026-45948

CVE-2026-45948 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. The underlying weakness is classified as CWE-401.

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-2026-32232
Weakness: CWE-401
Affected product: Linux Linux Kernel
Published: 2026-05-27
Last modified: 2026-06-17

Description

In the Linux kernel, the following vulnerability has been resolved: ext4: fix memory leak in ext4_ext_shift_extents() In ext4_ext_shift_extents(), if the extent is NULL in the while loop, the function returns immediately without releasing the path obtained via ext4_find_extent(), leading to a memory leak. Fix this by jumping to the out label to ensure the path is properly released.

Frequently asked questions

What is CVE-2026-45948?: In the Linux kernel, the following vulnerability has been resolved: ext4: fix memory leak in ext4_ext_shift_extents() In ext4_ext_shift_extents(), if the extent is NULL in the while loop, the function returns immediately without releasing the path obtained via ext4_find_extent(), leading to a memory leak. Fix this by jumping to the out label to ensure the path is properly released.
How severe is CVE-2026-45948?: CVE-2026-45948 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-2026-45948 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-2026-45948?: CVE-2026-45948 primarily affects Linux Linux Kernel. In total, 8 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2026-45948?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-45948 have an EU (EUVD) identifier?: Yes. CVE-2026-45948 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-32232.
When was CVE-2026-45948 published?: CVE-2026-45948 was published on 2026-05-27 and last updated on 2026-06-17.

References

Affected products (8)

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:3.15:-:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:3.15:rc3:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:3.15:rc4:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:3.15:rc5:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:3.15:rc6:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:3.15:rc7:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:3.15:rc8:*:*:*:*:*:*

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