EUVD-2023-60264

In the Linux kernel, the following vulnerability has been resolved: ext4: fix invalid free tracking in ext4xattrmovetoblock In ext4xattrmovetoblock, the value of the extended attribute which we need to move to an external block may be allocated by kvmalloc if the value is stored in an external...

EUVD-2022-55795

In the Linux kernel, the following vulnerability has been resolved: btrfs: set generation before calling btrfscleantreeblock in btrfsinitnewbuffer syzbot is reporting uninit-value in btrfscleantreeblock 1, for commit bc877d285ca3dba2 "btrfs: Deduplicate extentbuffer init code" missed that...

EUVD-2022-55818

In the Linux kernel, the following vulnerability has been resolved: erofs: Fix pcluster memleak when its block address is zero syzkaller reported a memleak: https://syzkaller.appspot.com/bug?id=62f37ff612f0021641eda5b17f056f1668aa9aed unreferenced object 0xffff88811009c7f8 size 136: ... backtrace...

CVE-2023-54107

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: dropping parent refcount after pdfreefn is done Some cgroup policies will access parent pd through child pd even after pdofflinefn is done. If pdfreefn for parent is called before child, then UAF can be triggered. Hen...

CVE-2022-50743

In the Linux kernel, the following vulnerability has been resolved: erofs: Fix pcluster memleak when its block address is zero syzkaller reported a memleak: https://syzkaller.appspot.com/bug?id=62f37ff612f0021641eda5b17f056f1668aa9aed unreferenced object 0xffff88811009c7f8 size 136: ... backtrace...

CVE-2023-54158

In the Linux kernel, the following vulnerability has been resolved: btrfs: don't free qgroup space unless specified Boris noticed in his simple quotas testing that he was getting a leak with Sweet Tea's change to subvol create that stopped doing a transaction commit. This was just a side effect o...

UBUNTU-CVE-2022-50766

In the Linux kernel, the following vulnerability has been resolved: btrfs: set generation before calling btrfscleantreeblock in btrfsinitnewbuffer syzbot is reporting uninit-value in btrfscleantreeblock 1, for commit bc877d285ca3dba2 "btrfs: Deduplicate extentbuffer init code" missed that...

CVE-2022-50743

In the Linux kernel, the following vulnerability has been resolved: erofs: Fix pcluster memleak when its block address is zero syzkaller reported a memleak: https://syzkaller.appspot.com/bug?id=62f37ff612f0021641eda5b17f056f1668aa9aed unreferenced object 0xffff88811009c7f8 size 136: ... backtrace...

UBUNTU-CVE-2022-50743

In the Linux kernel, the following vulnerability has been resolved: erofs: Fix pcluster memleak when its block address is zero syzkaller reported a memleak: https://syzkaller.appspot.com/bug?id=62f37ff612f0021641eda5b17f056f1668aa9aed unreferenced object 0xffff88811009c7f8 size 136: ... backtrace...

CVE-2022-50766

In the Linux kernel, the following vulnerability has been resolved: btrfs: set generation before calling btrfscleantreeblock in btrfsinitnewbuffer syzbot is reporting uninit-value in btrfscleantreeblock 1, for commit bc877d285ca3dba2 "btrfs: Deduplicate extentbuffer init code" missed that...

CVE-2023-54158 btrfs: don't free qgroup space unless specified

In the Linux kernel, the following vulnerability has been resolved: btrfs: don't free qgroup space unless specified Boris noticed in his simple quotas testing that he was getting a leak with Sweet Tea's change to subvol create that stopped doing a transaction commit. This was just a side effect o...

CVE-2023-54107 blk-cgroup: dropping parent refcount after pd_free_fn() is done

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: dropping parent refcount after pdfreefn is done Some cgroup policies will access parent pd through child pd even after pdofflinefn is done. If pdfreefn for parent is called before child, then UAF can be triggered. Hen...

CVE-2023-54088

Technical details about CVE-2023-54088 (Linux blk-cgroup queue_lock handling) are not publicly provided in the supplied documents. Monitor OSV and distro advisories for patched versions and fixes.

CVE-2023-54088 blk-cgroup: hold queue_lock when removing blkg->q_node

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: hold queuelock when removing blkg-qnode When blkg is removed from q-blkglist from blkgfreeworkfn, queuelock has to be held, otherwise, all kinds of bugslist corruption, hard lockup, .. can be triggered from...

CVE-2023-54088 blk-cgroup: hold queue_lock when removing blkg->q_node

In the Linux kernel, the following vulnerability has been resolved: blk-cgroup: hold queuelock when removing blkg-qnode When blkg is removed from q-blkglist from blkgfreeworkfn, queuelock has to be held, otherwise, all kinds of bugslist corruption, hard lockup, .. can be triggered from...

CVE-2022-50766

Summary: CVE-2022-50766 is a Linux kernel vulnerability in the Btrfs path. Reported to affect the Btrfs init flow, where generation data was incorrectly handled in btrfs_init_new_buffer, leading to uninitialized reads in btrfs_clean_tree_block. The root cause is that btrfs_set_header_generation()...

CVE-2022-50766 btrfs: set generation before calling btrfs_clean_tree_block in btrfs_init_new_buffer

In the Linux kernel, the following vulnerability has been resolved: btrfs: set generation before calling btrfscleantreeblock in btrfsinitnewbuffer syzbot is reporting uninit-value in btrfscleantreeblock 1, for commit bc877d285ca3dba2 "btrfs: Deduplicate extentbuffer init code" missed that...

CVE-2022-50743 erofs: Fix pcluster memleak when its block address is zero

In the Linux kernel, the following vulnerability has been resolved: erofs: Fix pcluster memleak when its block address is zero syzkaller reported a memleak: https://syzkaller.appspot.com/bug?id=62f37ff612f0021641eda5b17f056f1668aa9aed unreferenced object 0xffff88811009c7f8 size 136: ... backtrace...

CVE-2022-50743

Summary (CVE-2022-50743): In the Linux kernel’s erofs subsystem, a memleak occurs when a non-inline pcluster has a zero block address during readahead. Syzkaller reproduced a case in z_erofs_register_pcluster() where map->m_pa is zero and ztailpacking is false, causing pcl->obj.index to be ...

CVE-2022-50743 erofs: Fix pcluster memleak when its block address is zero

In the Linux kernel, the following vulnerability has been resolved: erofs: Fix pcluster memleak when its block address is zero syzkaller reported a memleak: https://syzkaller.appspot.com/bug?id=62f37ff612f0021641eda5b17f056f1668aa9aed unreferenced object 0xffff88811009c7f8 size 136: ... backtrace...