Improper link resolution before file access ('link following') in Windows Update Stack allows an authorized attacker to elevate privileges locally.

Heap-based buffer overflow in Windows ALPC allows an authorized attacker to elevate privileges locally.

Chromium CVE-2026-87491: Out of bounds write in V8

Deserialization of untrusted data in Microsoft Entra ID allows an unauthorized attacker to execute code over a network.

Microsoft Windows Ancillary Function Driver for WinSock contains a use-after-free vulnerability that allows an authorized attacker to elevate privileges locally.

Chromium: CVE-2026-85046 Type confusion in V8

Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.

Deserialization of untrusted data in Microsoft Office SharePoint allows an unauthorized attacker to execute code over a network.

Microsoft SharePoint contains a weak authentication vulnerability which allows an unauthorized attacker to bypass a security feature over a network.

Active Directory Federation Services Elevation of Privilege Vulnerability

Microsoft SharePoint contains a missing authentication for critical function vulnerability that allows an unauthorized attacker to elevate privileges over a network.

Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to execute code over a network.

In ip6appenddata(), when the paged-allocation branch is taken (MSGMORE / NETIFFSG / large fraglen), alloclen and pagedlen are computed as

alloclen = fragheaderlen + transhdrlen; pagedlen = datalen - transhdrlen;

datalen already includes fraggap (datalen = length + fraggap). When fraggap is non-zero, this is not the first skb and transhdrlen is zero. The fraggap bytes carried over from the previous skb are copied just past the fragment headers in the new skb's linear area. The linear area is therefore undersized by fraggap bytes while pagedlen is overstated by the same amount, and the copy writes past skb->end into the trailing skbsharedinfo.

An unprivileged user can trigger this via a UDPv6 socket using MSGMORE together with MSGSPLICEPAGES.

The bad accounting was introduced by commit 773ba4fe9104 ("ipv6: avoid partial copy for zc"). Before commit ce650a166335 ("udp6: Fix ip6appenddata()'s handling of MSGSPLICEPAGES"), the negative copy value caused -EINVAL to be returned. That later commit allowed MSGSPLICEPAGES to proceed in this case, making the corruption triggerable.

The non-paged branch sets alloclen to fraglen, which already accounts for fraggap because datalen does. Bring the paged branch in line by adding fraggap to alloclen and subtracting it from pagedlen.

After this adjustment, copy no longer collapses to -fraggap on the paged path, so remove the stale comment describing that old arithmetic. Since a negative copy is no longer expected for a valid MSGSPLICEPAGES case, remove the MSGSPLICEPAGES exception from the negative copy check.

Nmap - Integer Underflow in IPv6 Extension Header Parsing