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CVE-2024-56755— netfs/fscache: Add a memory barrier for FSCACHE_VOLUME_CREATING

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f2fs模块中f2fs_record_stop_reason函数中的潜在死锁。

AI Predicted 5.3 Difficulty: Easy EPSS 0.21% · P10

Possible ATT&CK Techniques 1 AI

T1496 · Resource Hijacking

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux bfa22da3ed652aa15acd4246fa13a0de6dbe4a59< ddab02607eed9e415dc62fde421d4329e5345315 affected
bfa22da3ed652aa15acd4246fa13a0de6dbe4a59< 539fabba965e119b98066fc6ba5257b5eaf4eda2 affected
bfa22da3ed652aa15acd4246fa13a0de6dbe4a59< 8beb682cc9a0798a280bbb95e3e41617237090b2 affected
bfa22da3ed652aa15acd4246fa13a0de6dbe4a59< 8cc1df3113cb71a0df2c46dd5b102c9e11c8a8c6 affected
bfa22da3ed652aa15acd4246fa13a0de6dbe4a59< 22f9400a6f3560629478e0a64247b8fcc811a24d affected
5.17 affected
< 5.17 unaffected
6.1.120≤ 6.1.* unaffected
… +4 more rows
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I. Basic Information for CVE-2024-56755

Vulnerability Information
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Vulnerability Title
netfs/fscache: Add a memory barrier for FSCACHE_VOLUME_CREATING
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: netfs/fscache: Add a memory barrier for FSCACHE_VOLUME_CREATING In fscache_create_volume(), there is a missing memory barrier between the bit-clearing operation and the wake-up operation. This may cause a situation where, after a wake-up, the bit-clearing operation hasn't been detected yet, leading to an indefinite wait. The triggering process is as follows: [cookie1] [cookie2] [volume_work] fscache_perform_lookup fscache_create_volume fscache_perform_lookup fscache_create_volume fscache_create_volume_work cachefiles_acquire_volume clear_and_wake_up_bit test_and_set_bit test_and_set_bit goto maybe_wait goto no_wait In the above process, cookie1 and cookie2 has the same volume. When cookie1 enters the -no_wait- process, it will clear the bit and wake up the waiting process. If a barrier is missing, it may cause cookie2 to remain in the -wait- process indefinitely. In commit 3288666c7256 ("fscache: Use clear_and_wake_up_bit() in fscache_create_volume_work()"), barriers were added to similar operations in fscache_create_volume_work(), but fscache_create_volume() was missed. By combining the clear and wake operations into clear_and_wake_up_bit() to fix this issue.
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 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f2fs模块中f2fs_record_stop_reason函数中的潜在死锁。
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 bfa22da3ed652aa15acd4246fa13a0de6dbe4a59 ~ ddab02607eed9e415dc62fde421d4329e5345315 -
Linux Linux 5.17 -

II. Public POCs for CVE-2024-56755

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III. Intelligence Information for CVE-2024-56755

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Patches & Fixes for CVE-2024-56755 (5)

Same Patch Batch · Linux · 2024-12-29 · 39 CVEs total

CVE-2024-56719 10.0 CRITICAL net: stmmac: fix TSO DMA API usage causing oops
CVE-2024-56718 9.8 CRITICAL net/smc: protect link down work from execute after lgr freed
CVE-2024-56720 7.8 HIGH bpf, sockmap: Several fixes to bpf_msg_pop_data
CVE-2024-56740 7.8 HIGH nfs/localio: must clear res.replen in nfs_local_read_done
CVE-2024-56709 7.8 HIGH io_uring: check if iowq is killed before queuing
CVE-2024-56715 7.8 HIGH ionic: Fix netdev notifier unregister on failure
CVE-2024-56717 7.5 HIGH net: mscc: ocelot: fix incorrect IFH SRC_PORT field in ocelot_ifh_set_basic()
CVE-2024-56749 7.5 HIGH dlm: fix dlm_recover_members refcount on error
CVE-2024-56721 7.1 HIGH x86/CPU/AMD: Terminate the erratum_1386_microcode array
CVE-2024-56747 scsi: qedi: Fix a possible memory leak in qedi_alloc_and_init_sb()
CVE-2024-56756 nvme-pci: fix freeing of the HMB descriptor table
CVE-2024-56742 vfio/mlx5: Fix an unwind issue in mlx5vf_add_migration_pages()
CVE-2024-56743 nfs_common: must not hold RCU while calling nfsd_file_put_local
CVE-2024-56754 crypto: caam - Fix the pointer passed to caam_qi_shutdown()
CVE-2024-56745 PCI: Fix reset_method_store() memory leak
CVE-2024-56744 f2fs: fix to avoid potential deadlock in f2fs_record_stop_reason()
CVE-2024-56746 fbdev: sh7760fb: Fix a possible memory leak in sh7760fb_alloc_mem()
CVE-2024-56748 scsi: qedf: Fix a possible memory leak in qedf_alloc_and_init_sb()
CVE-2024-56727 octeontx2-pf: handle otx2_mbox_get_rsp errors in otx2_flows.c
CVE-2024-56753 drm/amdgpu/gfx9: Add Cleaner Shader Deinitialization in gfx_v9_0 Module

Showing top 20 of 39 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-56755

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