EUVD-2026-12900Lifecycle Timeline
4DescriptionCVE.org
In the Linux kernel, the following vulnerability has been resolved:
io_uring/zcrx: fix page array leak
d9f595b9a65e ("io_uring/zcrx: fix leaking pages on sg init fail") fixed a page leakage but didn't free the page array, release it as well.
AnalysisAI
This vulnerability is a memory leak in the Linux kernel's io_uring subsystem, specifically within the zero-copy receive (zcrx) implementation where a page array fails to be deallocated during scatter-gather initialization failures. The vulnerability affects all Linux kernel versions with the vulnerable io_uring/zcrx code path, allowing local attackers with the ability to trigger failed scatter-gather operations to exhaust kernel memory and cause denial of service. No active exploitation has been reported, but this is a kernel memory management issue with straightforward local triggering conditions.
Technical ContextAI
The vulnerability exists in the Linux kernel's io_uring/zcrx (zero-copy receive) module, which implements high-performance network receive operations. The issue stems from incomplete error handling in the scatter-gather initialization path: when scatter-gather setup fails, a previous patch (d9f595b9a65e) correctly freed leaked pages but neglected to deallocate the page array itself. This is a classic resource cleanup error (CWE class relating to improper resource management) in kernel-level memory allocation. The io_uring interface is accessible to unprivileged local users, making the attack surface significant. The affected product is the Linux kernel across all distributions, identified via CPE cpe:2.3:a:linux:linux:*:*:*:*:*:*:*:* with no specific version constraints initially defined, though the vulnerability was introduced in commit d9f595b9a65e and patched in subsequent commits.
RemediationAI
Update the Linux kernel to a version containing the fix commits 64cf3016234ce8a6e4195ed1b2d9e2a1ae41b57d or 0ae91d8ab70922fb74c22c20bedcb69459579b1c (available via https://git.kernel.org/stable/). Most distributions have already backported these fixes to their stable kernel releases; check your distribution's security advisories and kernel update channels for the patched version. Until patching is feasible, limit io_uring access to trusted applications via LSM policies (such as AppArmor or SELinux) to reduce the attack surface for triggering this memory leak condition.
More in Linux Kernel
View allLinux kernel contains a flaw known as 'Dirty Pipe' where improper pipe buffer flag initialization allows unprivileged lo
The overlayfs implementation in the linux (aka Linux kernel) package before 3.19.0-21.21 in Ubuntu through 15.04 does no
The packet_set_ring function in net/packet/af_packet.c in the Linux kernel through 4.10.6 does not properly validate cer
The check_alu_op function in kernel/bpf/verifier.c in the Linux kernel through 4.4 allows local users to cause a denial
Linux kernel: Exploitable memory corruption due to UFO to non-UFO path switch. Rated high severity (CVSS 7.0). Public ex
The ovl_setattr function in fs/overlayfs/inode.c in the Linux kernel through 4.3.3 attempts to merge distinct setattr op
The mem_write function in the Linux kernel before 3.2.2, when ASLR is disabled, does not properly check permissions when
The compat_sys_recvmmsg function in net/compat.c in the Linux kernel before 3.13.2, when CONFIG_X86_X32 is enabled, allo
Race condition in net/packet/af_packet.c in the Linux kernel through 4.8.12 allows local users to gain privileges or cau
The join_session_keyring function in security/keys/process_keys.c in the Linux kernel before 4.4.1 mishandles object ref
A remote code execution vulnerability in the Broadcom Wi-Fi firmware could enable a remote attacker to execute arbitrary
It was discovered that the cls_route filter implementation in the Linux kernel would not remove an old filter from the h
Same technique Denial Of Service
View allVendor StatusVendor
Debian
| Release | Status | Fixed Version | Urgency |
|---|---|---|---|
| bullseye | not-affected | - | - |
| bullseye (security) | fixed | 5.10.251-1 | - |
| bookworm | not-affected | - | - |
| bookworm (security) | fixed | 6.1.164-1 | - |
| trixie | not-affected | - | - |
| trixie (security) | fixed | 6.12.74-2 | - |
| forky | fixed | 6.19.6-2 | - |
| sid | fixed | 6.19.8-1 | - |
| (unstable) | fixed | 6.18.10-1 | - |
Share
External POC / Exploit Code
Leaving vuln.today