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CVE-2024-50273— btrfs: reinitialize delayed ref list after deleting it from the list

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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，该漏洞源于重新初始化延迟引用列表。

CVSS 7.8 · High EPSS 0.29% · P20

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 1d57ee941692d0cc928526e21a1557b2ae3e11db< 2fd0948a483e9cb2d669c7199bc620a21c97673d affected
1d57ee941692d0cc928526e21a1557b2ae3e11db< 93c5b8decc0ef39ba84f4211d2db6da0a4aefbeb affected
1d57ee941692d0cc928526e21a1557b2ae3e11db< bf0b0c6d159767c0d1c21f793950d78486690ee0 affected
1d57ee941692d0cc928526e21a1557b2ae3e11db< c24fa427fc0ae827b2a3a07f13738cbf82c3f851 affected
1d57ee941692d0cc928526e21a1557b2ae3e11db< 2cb1a73d1d44a1c11b0ee5eeced765dd80ec48e6 affected
1d57ee941692d0cc928526e21a1557b2ae3e11db< f04be6d68f715c1473a8422fc0460f57b5e99931 affected
1d57ee941692d0cc928526e21a1557b2ae3e11db< 50a3933760b427759afdd23156a7280a19357a92 affected
1d57ee941692d0cc928526e21a1557b2ae3e11db< c9a75ec45f1111ef530ab186c2a7684d0a0c9245 affected
… +10 more rows
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I. Basic Information for CVE-2024-50273

Vulnerability Information
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Vulnerability Title
btrfs: reinitialize delayed ref list after deleting it from the list
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: reinitialize delayed ref list after deleting it from the list At insert_delayed_ref() if we need to update the action of an existing ref to BTRFS_DROP_DELAYED_REF, we delete the ref from its ref head's ref_add_list using list_del(), which leaves the ref's add_list member not reinitialized, as list_del() sets the next and prev members of the list to LIST_POISON1 and LIST_POISON2, respectively. If later we end up calling drop_delayed_ref() against the ref, which can happen during merging or when destroying delayed refs due to a transaction abort, we can trigger a crash since at drop_delayed_ref() we call list_empty() against the ref's add_list, which returns false since the list was not reinitialized after the list_del() and as a consequence we call list_del() again at drop_delayed_ref(). This results in an invalid list access since the next and prev members are set to poison pointers, resulting in a splat if CONFIG_LIST_HARDENED and CONFIG_DEBUG_LIST are set or invalid poison pointer dereferences otherwise. So fix this by deleting from the list with list_del_init() instead.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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，该漏洞源于重新初始化延迟引用列表。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux 1d57ee941692d0cc928526e21a1557b2ae3e11db ~ 2fd0948a483e9cb2d669c7199bc620a21c97673d -
Linux Linux 4.10 -

II. Public POCs for CVE-2024-50273

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III. Intelligence Information for CVE-2024-50273

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Patches & Fixes for CVE-2024-50273 (6)

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

CVE-2024-50286 9.8 CRITICAL ksmbd: fix slab-use-after-free in ksmbd_smb2_session_create
CVE-2024-50283 9.8 CRITICAL ksmbd: fix slab-use-after-free in smb3_preauth_hash_rsp
CVE-2024-50276 9.8 CRITICAL net: vertexcom: mse102x: Fix possible double free of TX skb
CVE-2024-53066 9.8 CRITICAL nfs: Fix KMSAN warning in decode_getfattr_attrs()
CVE-2024-53058 9.4 CRITICAL net: stmmac: TSO: Fix unbalanced DMA map/unmap for non-paged SKB data
CVE-2024-53082 8.4 HIGH virtio_net: Add hash_key_length check
CVE-2024-50299 8.2 HIGH sctp: properly validate chunk size in sctp_sf_ootb()
CVE-2024-50293 7.8 HIGH net/smc: do not leave a dangling sk pointer in __smc_create()
CVE-2024-50291 7.8 HIGH media: dvb-core: add missing buffer index check
CVE-2024-50294 7.8 HIGH rxrpc: Fix missing locking causing hanging calls
CVE-2023-52921 7.8 HIGH drm/amdgpu: fix possible UAF in amdgpu_cs_pass1()
CVE-2024-50300 7.8 HIGH regulator: rtq2208: Fix uninitialized use of regulator_config
CVE-2024-50288 7.8 HIGH media: vivid: fix buffer overwrite when using > 32 buffers
CVE-2024-53076 7.8 HIGH iio: gts-helper: Fix memory leaks for the error path of iio_gts_build_avail_scale_table()
CVE-2024-53088 7.8 HIGH i40e: fix race condition by adding filter's intermediate sync state
CVE-2024-53080 7.8 HIGH drm/panthor: Lock XArray when getting entries for the VM
CVE-2024-53079 7.8 HIGH mm/thp: fix deferred split unqueue naming and locking
CVE-2024-53057 7.8 HIGH net/sched: stop qdisc_tree_reduce_backlog on TC_H_ROOT
CVE-2024-53044 7.8 HIGH net/sched: sch_api: fix xa_insert() error path in tcf_block_get_ext()
CVE-2024-50301 7.8 HIGH security/keys: fix slab-out-of-bounds in key_task_permission

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-2024-50273

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