High severity · published Sep 11, 2026
CVE-2026-89602
erofs: skip sufficiently large global buffers when resizing
7.8
CVSS
0.2%
EPSS
No
On KEV
Description
In the Linux kernel, the following vulnerability has been resolved:
erofs: skip sufficiently large global buffers when resizing
z_erofs_gbuf_nrpages is advanced only after every global buffer has been
grown. If a resize fails after some buffers were enlarged, a retry
revisits those enlarged buffers.
Retrying the same size then returns -ENOMEM because alloc_pages_bulk()
has no pages to add and the unchanged return value is treated as a
failure. Retrying an intermediate size allocates a temporary pointer
array smaller than gbuf->nrpages and copies more existing pointers than
the array can hold.
Skip buffers that already satisfy the request. Once all remaining
buffers have caught up, advancing z_erofs_gbuf_nrpages again describes
the guaranteed minimum size across the pool.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.2% · higher than 7% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Linux · Linux
d6db47e571dcaecaeaafa8840d00ae849ae3907b before 3fbdd15d5830f52661eb78be95058d101cb0c2cb; d6db47e571dcaecaeaafa8840d00ae849ae3907b before 7267557ce98ccd07faaf3bc86382448950cc4ff6; d6db47e571dcaecaeaafa8840d00ae849ae3907b before 7f4a89d4f0d6acaf4b756c31de48f2109a257b70; d6db47e571dcaecaeaafa8840d00ae849ae3907b before a7d097cf01301c5da37927c8f26123d006f0fd8a; 6.10 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-89602
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-89602
git.kernel.org
https://git.kernel.org/stable/c/3fbdd15d5830f52661eb78be95058d101cb0c2cb
git.kernel.org
https://git.kernel.org/stable/c/7267557ce98ccd07faaf3bc86382448950cc4ff6
git.kernel.org
https://git.kernel.org/stable/c/7f4a89d4f0d6acaf4b756c31de48f2109a257b70
git.kernel.org
https://git.kernel.org/stable/c/a7d097cf01301c5da37927c8f26123d006f0fd8a
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