CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HIn the Linux kernel, the following vulnerability has been resolved: xsk: cache csum_start/csum_offset to fix TOCTOU in xsk_skb_metadata() The TX metadata area resides in the UMEM buffer which is memory-mapped and concurrently writable by userspace. In xsk_skb_metadata(), csum_start and csum_offset are read from shared memory for bounds validation, then read again for skb assignment. A malicious userspace application can race to overwrite these values between the two reads, bypassing the bounds check and causing out-of-bounds memory access during checksum computation in the transmit path. Fix this by reading csum_start and csum_offset into local variables once, then using the local copies for both validation and assignment. Note that other metadata fields (flags, launch_time) and the cached csum fields may be mutually inconsistent due to concurrent userspace writes, but this is benign: the only security-critical invariant is that each field's validated value is the same one used, which local caching guarantees.
Multiple vulnerabilities have been discovered in the SUSE Linux kernel. These vulnerabilities can lead to data confidentiality and integrity breaches, policy circumvention, and denial of service conditions. The affected…
Multiple vulnerabilities have been discovered in the Linux kernel of SUSE. Several of these vulnerabilities allow for privilege escalation, data confidentiality breaches, and data integrity issues. These vulnerabilities…
Multiple vulnerabilities have been discovered in the SUSE Linux kernel. Several of these vulnerabilities can lead to privilege escalation, denial of service, and data confidentiality breaches. The vulnerabilities are bei…