SB2026072828 - Integer overflow in Linux kernel core
Published: July 28, 2026
Security Bulletin ID
SB2026072828
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Integer overflow (CVE-ID: CVE-2026-64548)
CWE-ID: CWE-190 - Integer overflow
CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to an integer overflow leading to an out-of-bounds write in bpf_msg_push_data() when processing a crafted len value in the copy fallback path. A local user can supply a crafted len value to cause a denial of service.
Exploitation requires access to BPF-driven sockmap message processing and occurs when the scatterlist ring is full or nearly full.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/0c0a8ed85349dae298712d79cb276acfeb794d82
- https://git.kernel.org/stable/c/4e40056bb5c829f0423f0a6694a0477726d2147e
- https://git.kernel.org/stable/c/888706a76286c547bd035432602571e8024b5305
- https://git.kernel.org/stable/c/a12b1575f9feabd91695a9e9d004862f7195fa25
- https://git.kernel.org/stable/c/bd004716ba75fed6d185795c85cdc92540ebeaab
- https://git.kernel.org/stable/c/db77b6bb6e6edb79b10b4efcce346eec5582d588
- https://git.kernel.org/stable/c/f1644c9508d24f50dd9e8ebe8d3ba86e0996d2f5
- https://git.kernel.org/stable/c/ff39d0e3b4feeb65ca43c453d7c75fdf872ded0d