CVE-2026-31586

A flaw was found in the Linux kernel's block control group blk-cgroup component. A timing issue in the cgwbreleaseworkfn function can lead to a use-after-free vulnerability. This occurs when a block control group object is prematurely released while still being referenced. A local attacker could...

CVE-2026-31586

In the Linux kernel, the following vulnerability has been resolved: mm: blk-cgroup: fix use-after-free in cgwbreleaseworkfn cgwbreleaseworkfn calls cssputwb-blkcgcss and then later accesses wb-blkcgcss again via blkcgunpinonline. If cssput drops the last reference, the blkcg can be freed...

DEBIAN-CVE-2026-31586

In the Linux kernel, the following vulnerability has been resolved: mm: blk-cgroup: fix use-after-free in cgwbreleaseworkfn cgwbreleaseworkfn calls cssputwb-blkcgcss and then later accesses wb-blkcgcss again via blkcgunpinonline. If cssput drops the last reference, the blkcg can be freed...

AZL-83858 CVE-2026-31586 affecting package kernel for versions less than 6.6.137.1-1

In the Linux kernel, the following vulnerability has been resolved: mm: blk-cgroup: fix use-after-free in cgwbreleaseworkfn cgwbreleaseworkfn calls cssputwb-blkcgcss and then later accesses wb-blkcgcss again via blkcgunpinonline. If cssput drops the last reference, the blkcg can be freed...

EUVD-2026-25479

In the Linux kernel, the following vulnerability has been resolved: mm: blk-cgroup: fix use-after-free in cgwbreleaseworkfn cgwbreleaseworkfn calls cssputwb-blkcgcss and then later accesses wb-blkcgcss again via blkcgunpinonline. If cssput drops the last reference, the blkcg can be freed...

CVE-2026-31586

Summary: CVE-2026-31586 is a Linux kernel use-after-free in blk-cgroup during cgwb_release_workfn. The vulnerability occurs when css_put(wb->blkcg_css) is followed by accessing wb->blkcg_css via blkcg_unpin_online(), which can free the blkcg asynchronously (css_free_rwork_fn -> kfree) if...

CVE-2026-31586

In the Linux kernel, the following vulnerability has been resolved: mm: blk-cgroup: fix use-after-free in cgwbreleaseworkfn cgwbreleaseworkfn calls cssputwb-blkcgcss and then later accesses wb-blkcgcss again via blkcgunpinonline. If cssput drops the last reference, the blkcg can be freed...

CVE-2026-31586 mm: blk-cgroup: fix use-after-free in cgwb_release_workfn()

In the Linux kernel, the following vulnerability has been resolved: mm: blk-cgroup: fix use-after-free in cgwbreleaseworkfn cgwbreleaseworkfn calls cssputwb-blkcgcss and then later accesses wb-blkcgcss again via blkcgunpinonline. If cssput drops the last reference, the blkcg can be freed...

CVE-2026-31586 mm: blk-cgroup: fix use-after-free in cgwb_release_workfn()

In the Linux kernel, the following vulnerability has been resolved: mm: blk-cgroup: fix use-after-free in cgwbreleaseworkfn cgwbreleaseworkfn calls cssputwb-blkcgcss and then later accesses wb-blkcgcss again via blkcgunpinonline. If cssput drops the last reference, the blkcg can be freed...

CVE-2026-31586

In the Linux kernel, the following vulnerability has been resolved: mm: blk-cgroup: fix use-after-free in cgwbreleaseworkfn cgwbreleaseworkfn calls cssputwb-blkcgcss and then later accesses wb-blkcgcss again via blkcgunpinonline. If cssput drops the last reference, the blkcg can be freed...

Linux kernel 安全漏洞

The Linux kernel is the kernel used by the Linux operating system developed by the Linux Foundation in the United States. There is a security vulnerability in the Linux kernel, which stems from the reuse of the cgwbreleaseworkfn function after it is released in the mm blk-cgroup. This could lead ...

CVE-2026-31586: Use After Free

In the Linux kernel, the following vulnerability has been resolved: mm: blk-cgroup: fix use-after-free in cgwbreleaseworkfn cgwbreleaseworkfn calls cssputwb-blkcgcss and then later accesses wb-blkcgcss again via blkcgunpinonline. If cssput drops the last reference, the blkcg can be freed...

PT-2026-34938

Name of the Vulnerable Software and Affected Versions Linux kernel affected versions not specified Description A use-after-free issue exists in the function cgwb release workfn. The function calls css putwb-blkcg css and subsequently accesses wb-blkcg css again via blkcg unpin online. If css put...

Unity Linux 20.1070a Security Update: kernel (UTSA-2026-013804)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-013804 advisory. In the Linux kernel, the following vulnerability has been resolved: sched: Fix yet more schedfork races Where commit 4ef0c5c6b5ba kernel/sched: Fix schedfork access ...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-010747)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-010747 advisory. In the Linux kernel, the following vulnerability has been resolved: sched: Fix yet more schedfork races Where commit 4ef0c5c6b5ba kernel/sched: Fix schedfork access ...

Unity Linux 20.1050a / 20.1060a / 20.1070a Security Update: kernel (UTSA-2026-006899)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-006899 advisory. In the Linux kernel, the following vulnerability has been resolved: bpf, cgroup: Fix kernel BUG in purgeeffectiveprogs Syzkaller reported a triggered kernel BUG as...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-013182)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-013182 advisory. In the Linux kernel, the following vulnerability has been resolved: cgroup: Add missing cpusreadlock to cgroupattachtaskall syzbot is hitting...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-011011)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-011011 advisory. In the Linux kernel, the following vulnerability has been resolved: bpf, cgroup: Fix kernel BUG in purgeeffectiveprogs Syzkaller reported a triggered kernel BUG as...

Unity Linux 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-011247)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-011247 advisory. In the Linux kernel, the following vulnerability has been resolved: block, bfq: fix possible uaf for 'bfqq-bic' Our test report a uaf for 'bfqq-bic' in 5.10:...

Unity Linux 20.1050e / 20.1060e / 20.1070e Security Update: kernel (UTSA-2026-007569)

The Unity Linux 20 host has a package installed that is affected by a vulnerability as referenced in the UTSA-2026-007569 advisory. In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: fix UAF by grabbing blkcg lock before destroying blkg pd KASAN reports a use-after-fr...