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: net: openvswitch: reject oversized nested action attrs Open vSwitch stores generated flow actions as nlattrs, whose nla_len field is u16. Commit a1e64addf3ff ("net: openvswitch: remove misbehaving actions length check") allowed the total sw_flow_actions stream to grow beyond 64 KiB, which is valid, but also removed the last guard preventing a generated nested action attribute from exceeding U16_MAX. An oversized generated container can thus be closed with a truncated nla_len. A later dump or teardown then walks a structurally different stream than the one that was validated. In particular, an oversized nested CLONE/CT action may cause subsequent bytes in the generated stream to be interpreted as independent actions. Keep the larger total-action-stream behavior, but make nested action close reject generated containers that do not fit in nla_len, and return the error through all callers. For recursive SAMPLE, CLONE, DEC_TTL, and CHECK_PKT_LEN builders, trim resource-owning action-list tails in reverse construction order before discarding failed wrappers, so resources copied into the rejected tails are released before the wrappers are removed. Most failed outer wrappers are discarded by truncating actions_len after child resources have been released. CHECK_PKT_LEN also trims its parent after branch resources are gone. SET/TUNNEL close failures unwind their known tun_dst ownership directly, and SET_TO_MASKED has no external ownership and truncates on close failure.
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This week’s security news is dominated by AI-related threats, including a vulnerability exploited in Metabase, a new Shai-Hulud worm leveraging the MCP Registry, and a Chinese review of Palo Alto Networks. Alongside the…
Multiple vulnerabilities have been discovered in the Linux kernel of Debian LTS. These vulnerabilities allow for privilege escalation, data compromise, and denial of service. The affected Debian versions include 11 (Bull…
Multiple vulnerabilities have been discovered in Red Hat's Linux kernel. Some of these vulnerabilities allow an attacker to cause arbitrary code execution, privilege escalation, and a denial-of-service attack. These vuln…
Multiple vulnerabilities have been discovered in the Linux kernel of Debian. These vulnerabilities allow an attacker to cause privilege escalation, data corruption, and denial of service. The affected Debian versions are…
A critical memory corruption vulnerability (CVE-2026-64531) in the Linux kernel's Open vSwitch datapath allows local users to gain root access on a wide range of distributions. The vulnerability stems from a 16-bit lengt…
