CVE-2026-98868

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Source
https://cve.org/CVERecord?id=CVE-2026-98868
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98868.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-98868
Downstream
Published
2026-10-18T15:51:30Z
Modified
2026-10-19T02:47:36Z
Summary
dm-pcache: reject a kset that overruns its segment
Details

In the Linux kernel, the following vulnerability has been resolved:

dm-pcache: reject a kset that overruns its segment

cache_replay(), the writeback worker and the GC worker read a kset of get_kset_onmedia_size() bytes and advance the position by it. A forged key_num makes that size exceed the segment's remaining space, so the advance walks past the segment and trips the cache_pos_advance() BUG_ON.

Reject a kset whose on-media size exceeds cache_seg_remain() before use.

Database specific 
{
    "cna_assigner":  "Linux",
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98868.json"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
1d57628ff95b32d5cfa8d8f50e07690c161e9cf0
Fixed
01a700e9278da5706c865b9ca3ae70fdb7b4531d
Fixed
96e2863b1f81ea61b8d8d5d5a45d3b4c018f8e10
Fixed
7ac1f10f987a2ffae4aecf0e2ceca8f552b665cb

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98868.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
6.18.0
Fixed
6.18.52
Type
ECOSYSTEM
Events
Introduced
6.19.0
Fixed
7.2.10

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-98868.json"