CVE-2026-52937

CVE-2026-52937 details a stack information leak in the Linux kernel related to the macvtap mac address path. In tap_ioctl() for SIOCGIFHWADDR, the code copies 16 bytes from an uninitialized on-stack sockaddr_storage to userspace via ifr_hwaddr. The implementation only writes sa_family and dev-&gt...

RHSA-2026:28038 Red Hat Security Advisory: gvisor-tap-vsock security update

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Important: Red Hat Security Advisory: gvisor-tap-vsock security update

An update for gvisor-tap-vsock is now available for Red Hat Enterprise Linux 9.6 Extended Update Support. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is...

SUSE CVE-2026-46320

In the Linux kernel, the following vulnerability has been resolved: tap: free page on error paths in tapgetuserxdp tapgetuserxdp rejects a frame shorter than ETHHLEN with -EINVAL, and returns -ENOMEM when buildskb fails. Both paths jump to the err label without freeing the page that...

CVE-2026-46321

A flaw was found in the Linux kernel. A local attacker with access to the tun/tap device can exploit this vulnerability. By sending network frames shorter than the expected header length, the system fails to free allocated memory pages, leading to memory leaks. This can exhaust system memory,...

CVE-2026-46320

A flaw was found in the Linux kernel's tap driver. This vulnerability occurs in the tapgetuserxdp function, where allocated memory pages are not properly freed when processing rejected network frames. Specifically, if a frame is shorter than the expected Ethernet header length or if memory...

CVE-2026-46320

In the Linux kernel, the following vulnerability has been resolved: tap: free page on error paths in tapgetuserxdp tapgetuserxdp rejects a frame shorter than ETHHLEN with -EINVAL, and returns -ENOMEM when buildskb fails. Both paths jump to the err label without freeing the page that...

UBUNTU-CVE-2026-46320

In the Linux kernel, the following vulnerability has been resolved: tap: free page on error paths in tapgetuserxdp tapgetuserxdp rejects a frame shorter than ETHHLEN with -EINVAL, and returns -ENOMEM when buildskb fails. Both paths jump to the err label without freeing the page that...

CVE-2026-46320 tap: free page on error paths in tap_get_user_xdp()

In the Linux kernel, the following vulnerability has been resolved: tap: free page on error paths in tapgetuserxdp tapgetuserxdp rejects a frame shorter than ETHHLEN with -EINVAL, and returns -ENOMEM when buildskb fails. Both paths jump to the err label without freeing the page that...

CVE-2026-46320

In the Linux kernel, the following vulnerability has been resolved: tap: free page on error paths in tapgetuserxdp tapgetuserxdp rejects a frame shorter than ETHHLEN with -EINVAL, and returns -ENOMEM when buildskb fails. Both paths jump to the err label without freeing the page that...

EUVD-2026-35410

In the Linux kernel, the following vulnerability has been resolved: tap: free page on error paths in tapgetuserxdp tapgetuserxdp rejects a frame shorter than ETHHLEN with -EINVAL, and returns -ENOMEM when buildskb fails. Both paths jump to the err label without freeing the page that...

CVE-2026-46320

The CVE-2026-46320 vulnerability affects the Linux kernel tap driver where memory pages allocated for frames in vhost_net_xdp() are not freed on error paths. Specifically, tap_get_user_xdp() may reject frames shorter than ETH_HLEN (-EINVAL) or fail build_skb() (-ENOMEM), but both error paths jump...

Linux kernel 安全漏洞

The Linux kernel is the core of the open-source operating system Linux, developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, which stems from the tapgetuserxdp function failing when short frames are rejected or the buildskb function fails,...

PT-2026-47757

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A memory leak occurs in the tap get user xdp function. When a frame is shorter than ETH HLEN, the function returns -EINVAL; similarly, it returns -ENOMEM if build skb fails. In both...

Linux Distros Unpatched Vulnerability : CVE-2026-46207

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - vsock/virtio: fix empty payload in tap skb for non-linear buffers For non-linear skbs, virtiotransportbuildskb goes through virtiotransportcopynonlinearskb to...

Unbreakable Enterprise kernel security update

5.4.17-2136.356.4.1 - smb: client: reject userspace cifs.spnego descriptions Asim Viladi Oglu Manizada Orabug: 39463669 5.4.17-2136.356.4 - tun: free page on buildskb failure in tunxdpone Weiming Shi Orabug: 39429147 - tap: free page on error paths in tapgetuserxdp Weiming Shi Orabug: 39429147 -...

Unbreakable Enterprise kernel security update

6.12.0-203.76.7.1 - smb: client: reject userspace cifs.spnego descriptions Asim Viladi Oglu Manizada Orabug: 39474418 6.12.0-203.76.7 - tun: free page on buildskb failure in tunxdpone Weiming Shi Orabug: 39456024 - tap: free page on error paths in tapgetuserxdp Weiming Shi Orabug: 39456024 - tun:...

CVE-2026-46207

A flaw was found in the Linux kernel's vsock/virtio component. When processing non-linear data buffers for the vsockmon tap device, the system did not correctly initialize the payload. This oversight could lead to uninitialized data being copied to the monitoring interface, potentially resulting ...

CVE-2026-46207

In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: fix empty payload in tap skb for non-linear buffers For non-linear skbs, virtiotransportbuildskb goes through virtiotransportcopynonlinearskb to copy the original payload in the new skb to be delivered to the vsockm...

UBUNTU-CVE-2026-46207

In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: fix empty payload in tap skb for non-linear buffers For non-linear skbs, virtiotransportbuildskb goes through virtiotransportcopynonlinearskb to copy the original payload in the new skb to be delivered to the vsockm...