CVE-2026-45948ext4: fix memory leak in ext4_ext_shift_extents()
- 5.5MediumCVSS base score
- 0.16%Exploitation in 30 daysEPSS · top 95% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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.
Timeline
ID reserved
By Linux
- 14 days later
· 14 days later
Published
- 5 months later
· 5 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.16% · top 95% of all CVEs (14 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.5.
Affected products
- affected a18ed359bdddcded4f97ff5e2f07793ff9336913 – < 7e807cb8603b7664fa630a696cd891d9a03c248d
- affected a18ed359bdddcded4f97ff5e2f07793ff9336913 – < afc5e61e1a07b2b833bd72cbee36ecce9cd901e2
- affected a18ed359bdddcded4f97ff5e2f07793ff9336913 – < 1bce219ee5512cf179ba40cf114945a14a16e21f
- affected a18ed359bdddcded4f97ff5e2f07793ff9336913 – < 4a79fde8db7eba7f1128d971ceba4e3c9ac84aec
- affected a18ed359bdddcded4f97ff5e2f07793ff9336913 – < 2f4b1052246ca646bb17bfe0f53df2fdf9729b58
- affected a18ed359bdddcded4f97ff5e2f07793ff9336913 – < 12615ab4bfb69678e5d961b28bb70040299e51b1
- affected a18ed359bdddcded4f97ff5e2f07793ff9336913 – < bd7b52557e4a3ccd7595fdb3a585f1257de57935
- affected a18ed359bdddcded4f97ff5e2f07793ff9336913 – < ca81109d4a8f192dc1cbad4a1ee25246363c2833
- affected 3.15
- unaffected < 3.15
- unaffected 5.10.252 – ≤ 5.10.*
- unaffected 5.15.202 – ≤ 5.15.*
- unaffected 6.1.165 – ≤ 6.1.*
- unaffected 6.6.128 – ≤ 6.6.*
- unaffected 6.12.75 – ≤ 6.12.*
- unaffected 6.18.14 – ≤ 6.18.*
- unaffected 6.19.4 – ≤ 6.19.*
- unaffected 7.0 – ≤ *
References
References8
- https://git.kernel.org/stable/c/7e807cb8603b7664fa630a696cd891d9a03c248d (opens in a new tab)
- https://git.kernel.org/stable/c/afc5e61e1a07b2b833bd72cbee36ecce9cd901e2 (opens in a new tab)
- https://git.kernel.org/stable/c/1bce219ee5512cf179ba40cf114945a14a16e21f (opens in a new tab)
- https://git.kernel.org/stable/c/4a79fde8db7eba7f1128d971ceba4e3c9ac84aec (opens in a new tab)
- https://git.kernel.org/stable/c/2f4b1052246ca646bb17bfe0f53df2fdf9729b58 (opens in a new tab)
- https://git.kernel.org/stable/c/12615ab4bfb69678e5d961b28bb70040299e51b1 (opens in a new tab)
- https://git.kernel.org/stable/c/bd7b52557e4a3ccd7595fdb3a585f1257de57935 (opens in a new tab)
- https://git.kernel.org/stable/c/ca81109d4a8f192dc1cbad4a1ee25246363c2833 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-32232 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-45948)Record last updated .