Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1000 CNY

100.0%
Buy Us a Coffee

CVE-2024-50265— ocfs2: remove entry once instead of null-ptr-dereference in ocfs2_xa_remove()

EPSS 0.01% · P3
Get alerts for future matching vulnerabilitiesLog in to subscribe

I. Basic Information for CVE-2024-50265

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
ocfs2: remove entry once instead of null-ptr-dereference in ocfs2_xa_remove()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: ocfs2: remove entry once instead of null-ptr-dereference in ocfs2_xa_remove() Syzkaller is able to provoke null-ptr-dereference in ocfs2_xa_remove(): [ 57.319872] (a.out,1161,7):ocfs2_xa_remove:2028 ERROR: status = -12 [ 57.320420] (a.out,1161,7):ocfs2_xa_cleanup_value_truncate:1999 ERROR: Partial truncate while removing xattr overlay.upper. Leaking 1 clusters and removing the entry [ 57.321727] BUG: kernel NULL pointer dereference, address: 0000000000000004 [...] [ 57.325727] RIP: 0010:ocfs2_xa_block_wipe_namevalue+0x2a/0xc0 [...] [ 57.331328] Call Trace: [ 57.331477] <TASK> [...] [ 57.333511] ? do_user_addr_fault+0x3e5/0x740 [ 57.333778] ? exc_page_fault+0x70/0x170 [ 57.334016] ? asm_exc_page_fault+0x2b/0x30 [ 57.334263] ? __pfx_ocfs2_xa_block_wipe_namevalue+0x10/0x10 [ 57.334596] ? ocfs2_xa_block_wipe_namevalue+0x2a/0xc0 [ 57.334913] ocfs2_xa_remove_entry+0x23/0xc0 [ 57.335164] ocfs2_xa_set+0x704/0xcf0 [ 57.335381] ? _raw_spin_unlock+0x1a/0x40 [ 57.335620] ? ocfs2_inode_cache_unlock+0x16/0x20 [ 57.335915] ? trace_preempt_on+0x1e/0x70 [ 57.336153] ? start_this_handle+0x16c/0x500 [ 57.336410] ? preempt_count_sub+0x50/0x80 [ 57.336656] ? _raw_read_unlock+0x20/0x40 [ 57.336906] ? start_this_handle+0x16c/0x500 [ 57.337162] ocfs2_xattr_block_set+0xa6/0x1e0 [ 57.337424] __ocfs2_xattr_set_handle+0x1fd/0x5d0 [ 57.337706] ? ocfs2_start_trans+0x13d/0x290 [ 57.337971] ocfs2_xattr_set+0xb13/0xfb0 [ 57.338207] ? dput+0x46/0x1c0 [ 57.338393] ocfs2_xattr_trusted_set+0x28/0x30 [ 57.338665] ? ocfs2_xattr_trusted_set+0x28/0x30 [ 57.338948] __vfs_removexattr+0x92/0xc0 [ 57.339182] __vfs_removexattr_locked+0xd5/0x190 [ 57.339456] ? preempt_count_sub+0x50/0x80 [ 57.339705] vfs_removexattr+0x5f/0x100 [...] Reproducer uses faultinject facility to fail ocfs2_xa_remove() -> ocfs2_xa_value_truncate() with -ENOMEM. In this case the comment mentions that we can return 0 if ocfs2_xa_cleanup_value_truncate() is going to wipe the entry anyway. But the following 'rc' check is wrong and execution flow do 'ocfs2_xa_remove_entry(loc);' twice: * 1st: in ocfs2_xa_cleanup_value_truncate(); * 2nd: returning back to ocfs2_xa_remove() instead of going to 'out'. Fix this by skipping the 2nd removal of the same entry and making syzkaller repro happy.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于空指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
LinuxLinux 399ff3a748cf4c8c853e96dd477153202636527b ~ 38cbf13b2e7a31362babe411f7c2c3c52cd2734b -
LinuxLinux 2.6.34 -

II. Public POCs for CVE-2024-50265

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2024-50265

请登录查看更多情报信息。

Same Patch Batch · Linux · 2024-11-19 · 88 CVEs total

CVE-2024-53057net/sched: stop qdisc_tree_reduce_backlog on TC_H_ROOT
CVE-2024-53053scsi: ufs: core: Fix another deadlock during RTC update
CVE-2024-53055wifi: iwlwifi: mvm: fix 6 GHz scan construction
CVE-2024-53052io_uring/rw: fix missing NOWAIT check for O_DIRECT start write
CVE-2024-53048ice: fix crash on probe for DPLL enabled E810 LOM
CVE-2024-53049slub/kunit: fix a WARNING due to unwrapped __kmalloc_cache_noprof
CVE-2024-53047mptcp: init: protect sched with rcu_read_lock
CVE-2024-53045ASoC: dapm: fix bounds checker error in dapm_widget_list_create
CVE-2024-53046arm64: dts: imx8ulp: correct the flexspi compatible string
CVE-2024-53051drm/i915/hdcp: Add encoder check in intel_hdcp_get_capability
CVE-2024-53056drm/mediatek: Fix potential NULL dereference in mtk_crtc_destroy()
CVE-2024-53058net: stmmac: TSO: Fix unbalanced DMA map/unmap for non-paged SKB data
CVE-2024-53059wifi: iwlwifi: mvm: Fix response handling in iwl_mvm_send_recovery_cmd()
CVE-2024-53060drm/amdgpu: prevent NULL pointer dereference if ATIF is not supported
CVE-2024-53061media: s5p-jpeg: prevent buffer overflows
CVE-2024-53062media: mgb4: protect driver against spectre
CVE-2024-53064idpf: fix idpf_vc_core_init error path
CVE-2024-53063media: dvbdev: prevent the risk of out of memory access
CVE-2024-53066nfs: Fix KMSAN warning in decode_getfattr_attrs()
CVE-2024-53065mm/slab: fix warning caused by duplicate kmem_cache creation in kmem_buckets_create

Showing top 20 of 88 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-50265

No comments yet

Leave a comment