SB2026100786 - Memory corruption in Linux kernel atm
Published: October 7, 2026
Security Bulletin ID
SB2026100786
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Data manipulation
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Memory corruption (CVE-ID: CVE-2026-98287)
CWE-ID: CWE-119 - Memory corruption
CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local user to corrupt shared packet headers.
The vulnerability exists due to failure to ensure that packet headers are writable in pppoatm_send() when applying LLC encapsulation to packets received through PPP channel bridging. A local user can submit packets with shared headers through a bridged PPP channel to corrupt shared packet headers.
The affected encapsulation operation prepends a four-byte LLC header.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/208ccc4d08b1897451e9ba01c016bf93ff107966
- https://git.kernel.org/stable/c/30992fe39e65589ed8e000425e088fa74994b811
- https://git.kernel.org/stable/c/8e66c5969acd859ba72fb0a7fa895623fc1b3769
- https://git.kernel.org/stable/c/e2f5529b0016db7d34f411408607f5cf395a542e
- https://git.kernel.org/stable/c/e6cd1bba7d113c15c00ac63671213a096fe4d686
- https://git.kernel.org/stable/c/ecc7253683a3c55caa868ce0ee530fcb0044bd3c
- https://git.kernel.org/stable/c/ffc448eb54f5ba80d4212c1e870cdb92b0f709fa