SUSE: CVE-2024-39463: SUSE Linux Security Advisory

SUSE: CVE-2024-39463: SUSE Linux Security Advisory

Severity

7

CVSS

(AV:L/AC:L/Au:S/C:C/I:C/A:C)

Published

06/25/2024

Created

07/23/2024

Added

07/23/2024

Modified

01/28/2025

Description

In the Linux kernel, the following vulnerability has been resolved: 9p: add missing locking around taking dentry fid list Fix a use-after-free on dentry's d_fsdata fid list when a thread looks up a fid through dentry while another thread unlinks it: UAF thread: refcount_t: addition on 0; use-after-free. p9_fid_get linux/./include/net/9p/client.h:262 v9fs_fid_find+0x236/0x280 linux/fs/9p/fid.c:129 v9fs_fid_lookup_with_uid linux/fs/9p/fid.c:181 v9fs_fid_lookup+0xbf/0xc20 linux/fs/9p/fid.c:314 v9fs_vfs_getattr_dotl+0xf9/0x360 linux/fs/9p/vfs_inode_dotl.c:400 vfs_statx+0xdd/0x4d0 linux/fs/stat.c:248 Freed by: p9_fid_destroy (inlined) p9_client_clunk+0xb0/0xe0 linux/net/9p/client.c:1456 p9_fid_put linux/./include/net/9p/client.h:278 v9fs_dentry_release+0xb5/0x140 linux/fs/9p/vfs_dentry.c:55 v9fs_remove+0x38f/0x620 linux/fs/9p/vfs_inode.c:518 vfs_unlink+0x29a/0x810 linux/fs/namei.c:4335 The problem is that d_fsdata was not accessed under d_lock, because d_release() normally is only called once the dentry is otherwise no longer accessible but since we also call it explicitly in v9fs_remove that lock is required: move the hlist out of the dentry under lock then unref its fids once they are no longer accessible.

Solution(s)

• suse-upgrade-cluster-md-kmp-64kb
• suse-upgrade-cluster-md-kmp-azure
• suse-upgrade-cluster-md-kmp-default
• suse-upgrade-cluster-md-kmp-rt
• suse-upgrade-dlm-kmp-64kb
• suse-upgrade-dlm-kmp-azure
• suse-upgrade-dlm-kmp-default
• suse-upgrade-dlm-kmp-rt
• suse-upgrade-dtb-allwinner
• suse-upgrade-dtb-altera
• suse-upgrade-dtb-amazon
• suse-upgrade-dtb-amd
• suse-upgrade-dtb-amlogic
• suse-upgrade-dtb-apm
• suse-upgrade-dtb-apple
• suse-upgrade-dtb-arm
• suse-upgrade-dtb-broadcom
• suse-upgrade-dtb-cavium
• suse-upgrade-dtb-exynos
• suse-upgrade-dtb-freescale
• suse-upgrade-dtb-hisilicon
• suse-upgrade-dtb-lg
• suse-upgrade-dtb-marvell
• suse-upgrade-dtb-mediatek
• suse-upgrade-dtb-nvidia
• suse-upgrade-dtb-qcom
• suse-upgrade-dtb-renesas
• suse-upgrade-dtb-rockchip
• suse-upgrade-dtb-socionext
• suse-upgrade-dtb-sprd
• suse-upgrade-dtb-xilinx
• suse-upgrade-gfs2-kmp-64kb
• suse-upgrade-gfs2-kmp-azure
• suse-upgrade-gfs2-kmp-default
• suse-upgrade-gfs2-kmp-rt
• suse-upgrade-kernel-64kb
• suse-upgrade-kernel-64kb-devel
• suse-upgrade-kernel-64kb-extra
• suse-upgrade-kernel-64kb-livepatch-devel
• suse-upgrade-kernel-64kb-optional
• suse-upgrade-kernel-azure
• suse-upgrade-kernel-azure-devel
• suse-upgrade-kernel-azure-extra
• suse-upgrade-kernel-azure-livepatch-devel
• suse-upgrade-kernel-azure-optional
• suse-upgrade-kernel-azure-vdso
• suse-upgrade-kernel-debug
• suse-upgrade-kernel-debug-devel
• suse-upgrade-kernel-debug-livepatch-devel
• suse-upgrade-kernel-debug-vdso
• suse-upgrade-kernel-default
• suse-upgrade-kernel-default-base
• suse-upgrade-kernel-default-base-rebuild
• suse-upgrade-kernel-default-devel
• suse-upgrade-kernel-default-extra
• suse-upgrade-kernel-default-livepatch
• suse-upgrade-kernel-default-livepatch-devel
• suse-upgrade-kernel-default-optional
• suse-upgrade-kernel-default-vdso
• suse-upgrade-kernel-devel
• suse-upgrade-kernel-devel-azure
• suse-upgrade-kernel-devel-rt
• suse-upgrade-kernel-docs
• suse-upgrade-kernel-docs-html
• suse-upgrade-kernel-kvmsmall
• suse-upgrade-kernel-kvmsmall-devel
• suse-upgrade-kernel-kvmsmall-livepatch-devel
• suse-upgrade-kernel-kvmsmall-vdso
• suse-upgrade-kernel-macros
• suse-upgrade-kernel-obs-build
• suse-upgrade-kernel-obs-qa
• suse-upgrade-kernel-rt
• suse-upgrade-kernel-rt-devel
• suse-upgrade-kernel-rt-extra
• suse-upgrade-kernel-rt-livepatch
• suse-upgrade-kernel-rt-livepatch-devel
• suse-upgrade-kernel-rt-optional
• suse-upgrade-kernel-rt-vdso
• suse-upgrade-kernel-rt_debug
• suse-upgrade-kernel-rt_debug-devel
• suse-upgrade-kernel-rt_debug-livepatch-devel
• suse-upgrade-kernel-rt_debug-vdso
• suse-upgrade-kernel-source
• suse-upgrade-kernel-source-azure
• suse-upgrade-kernel-source-rt
• suse-upgrade-kernel-source-vanilla
• suse-upgrade-kernel-syms
• suse-upgrade-kernel-syms-azure
• suse-upgrade-kernel-syms-rt
• suse-upgrade-kernel-zfcpdump
• suse-upgrade-kselftests-kmp-64kb
• suse-upgrade-kselftests-kmp-azure
• suse-upgrade-kselftests-kmp-default
• suse-upgrade-kselftests-kmp-rt
• suse-upgrade-ocfs2-kmp-64kb
• suse-upgrade-ocfs2-kmp-azure
• suse-upgrade-ocfs2-kmp-default
• suse-upgrade-ocfs2-kmp-rt
• suse-upgrade-reiserfs-kmp-64kb
• suse-upgrade-reiserfs-kmp-azure
• suse-upgrade-reiserfs-kmp-default
• suse-upgrade-reiserfs-kmp-rt

References

• https://attackerkb.com/topics/cve-2024-39463
• CVE - 2024-39463