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CVE-2024-56774— btrfs: add a sanity check for btrfs root in btrfs_search_slot()

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存在代码问题漏洞，该漏洞源于Btrfs文件系统在btrfs_search_slot函数中未对btrfs根进行空指针检查，当使用rescue=ibadroots参数且extent树根损坏时，可能导致空指针解引用，影响文件系统的稳定性和可靠性。

AI Predicted 7.8 Difficulty: Hard EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 42437a6386ffeaaf200731e73d723ea491f3fe7d< c71d114ef68c95da5a82ec85a721ab31f5bd905b affected
42437a6386ffeaaf200731e73d723ea491f3fe7d< db66fb87c21e8ae724886e6a464dcbac562a64c6 affected
42437a6386ffeaaf200731e73d723ea491f3fe7d< 757171d1369b3b47f36932d40a05a0715496dcab affected
42437a6386ffeaaf200731e73d723ea491f3fe7d< 93992c3d9629b02dccf6849238559d5c24f2dece affected
42437a6386ffeaaf200731e73d723ea491f3fe7d< 3ed51857a50f530ac7a1482e069dfbd1298558d4 affected
5.11 affected
< 5.11 unaffected
5.15.174≤ 5.15.* unaffected
… +4 more rows
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I. Basic Information for CVE-2024-56774

Vulnerability Information
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Vulnerability Title
btrfs: add a sanity check for btrfs root in btrfs_search_slot()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: btrfs: add a sanity check for btrfs root in btrfs_search_slot() Syzbot reports a null-ptr-deref in btrfs_search_slot(). The reproducer is using rescue=ibadroots, and the extent tree root is corrupted thus the extent tree is NULL. When scrub tries to search the extent tree to gather the needed extent info, btrfs_search_slot() doesn't check if the target root is NULL or not, resulting the null-ptr-deref. Add sanity check for btrfs root before using it in btrfs_search_slot().
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 代码问题漏洞
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存在代码问题漏洞，该漏洞源于Btrfs文件系统在btrfs_search_slot函数中未对btrfs根进行空指针检查，当使用rescue=ibadroots参数且extent树根损坏时，可能导致空指针解引用，影响文件系统的稳定性和可靠性。
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 42437a6386ffeaaf200731e73d723ea491f3fe7d ~ c71d114ef68c95da5a82ec85a721ab31f5bd905b -
Linux Linux 5.11 -

II. Public POCs for CVE-2024-56774

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III. Intelligence Information for CVE-2024-56774

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Patches & Fixes for CVE-2024-56774 (5)

Same Patch Batch · Linux · 2025-01-08 · 16 CVEs total

CVE-2024-56779 9.8 CRITICAL nfsd: fix nfs4_openowner leak when concurrent nfsd4_open occur
CVE-2024-56775 7.8 HIGH drm/amd/display: Fix handling of plane refcount
CVE-2024-56784 7.8 HIGH drm/amd/display: Adding array index check to prevent memory corruption
CVE-2024-56770 net/sched: netem: account for backlog updates from child qdisc
CVE-2024-56771 mtd: spinand: winbond: Fix 512GW, 01GW, 01JW and 02JW ECC information
CVE-2024-56773 kunit: Fix potential null dereference in kunit_device_driver_test()
CVE-2024-56772 kunit: string-stream: Fix a UAF bug in kunit_init_suite()
CVE-2024-56776 drm/sti: avoid potential dereference of error pointers
CVE-2024-56777 drm/sti: avoid potential dereference of error pointers in sti_gdp_atomic_check
CVE-2024-56778 drm/sti: avoid potential dereference of error pointers in sti_hqvdp_atomic_check
CVE-2024-56780 quota: flush quota_release_work upon quota writeback
CVE-2024-56782 ACPI: x86: Add adev NULL check to acpi_quirk_skip_serdev_enumeration()
CVE-2024-56783 netfilter: nft_socket: remove WARN_ON_ONCE on maximum cgroup level
CVE-2024-56785 MIPS: Loongson64: DTS: Really fix PCIe port nodes for ls7a
CVE-2024-56787 soc: imx8m: Probe the SoC driver as platform driver

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-56774

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