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CVE-2024-26587— net: netdevsim: don't try to destroy PHC on VFs

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NULL指针取消引用。

AI Predicted 4.7 Difficulty: Moderate EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 8

VendorProduct Version RangeStatus
Linux Linux b63e78fca889e07931ec8f259701718a24e5052e< 08aca65997fb6f233066883b1f1e653bcb1f26ca affected
b63e78fca889e07931ec8f259701718a24e5052e< c5068e442eed063d2f1658e6b6d3c1c6fcf1e588 affected
b63e78fca889e07931ec8f259701718a24e5052e< ea937f77208323d35ffe2f8d8fc81b00118bfcda affected
6.6 affected
< 6.6 unaffected
6.6.14≤ 6.6.* unaffected
6.7.2≤ 6.7.* unaffected
6.8≤ * unaffected
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I. Basic Information for CVE-2024-26587

Vulnerability Information
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Vulnerability Title
net: netdevsim: don't try to destroy PHC on VFs
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: netdevsim: don't try to destroy PHC on VFs PHC gets initialized in nsim_init_netdevsim(), which is only called if (nsim_dev_port_is_pf()). Create a counterpart of nsim_init_netdevsim() and move the mock_phc_destroy() there. This fixes a crash trying to destroy netdevsim with VFs instantiated, as caught by running the devlink.sh test: BUG: kernel NULL pointer dereference, address: 00000000000000b8 RIP: 0010:mock_phc_destroy+0xd/0x30 Call Trace: <TASK> nsim_destroy+0x4a/0x70 [netdevsim] __nsim_dev_port_del+0x47/0x70 [netdevsim] nsim_dev_reload_destroy+0x105/0x120 [netdevsim] nsim_drv_remove+0x2f/0xb0 [netdevsim] device_release_driver_internal+0x1a1/0x210 bus_remove_device+0xd5/0x120 device_del+0x159/0x490 device_unregister+0x12/0x30 del_device_store+0x11a/0x1a0 [netdevsim] kernfs_fop_write_iter+0x130/0x1d0 vfs_write+0x30b/0x4b0 ksys_write+0x69/0xf0 do_syscall_64+0xcc/0x1e0 entry_SYSCALL_64_after_hwframe+0x6f/0x77
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NULL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

Vendor Product Affected Versions CPE Subscribe
Linux Linux b63e78fca889e07931ec8f259701718a24e5052e ~ 08aca65997fb6f233066883b1f1e653bcb1f26ca -
Linux Linux 6.6 -

II. Public POCs for CVE-2024-26587

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III. Intelligence Information for CVE-2024-26587

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Other References for CVE-2024-26587 (2)

Same Patch Batch · Linux · 2024-02-22 · 17 CVEs total

CVE-2024-26592 9.8 CRITICAL ksmbd: fix UAF issue in ksmbd_tcp_new_connection()
CVE-2023-52447 7.8 HIGH bpf: Defer the free of inner map when necessary
CVE-2023-52444 7.8 HIGH f2fs: fix to avoid dirent corruption
CVE-2024-26589 7.8 HIGH bpf: Reject variable offset alu on PTR_TO_FLOW_KEYS
CVE-2024-26586 7.8 HIGH mlxsw: spectrum_acl_tcam: Fix stack corruption
CVE-2024-26591 bpf: Fix re-attachment branch in bpf_tracing_prog_attach
CVE-2023-52452 bpf: Fix accesses to uninit stack slots
CVE-2023-52451 powerpc/pseries/memhp: Fix access beyond end of drmem array
CVE-2023-52450 perf/x86/intel/uncore: Fix NULL pointer dereference issue in upi_fill_topology()
CVE-2023-52449 mtd: Fix gluebi NULL pointer dereference caused by ftl notifier
CVE-2023-52448 gfs2: Fix kernel NULL pointer dereference in gfs2_rgrp_dump
CVE-2023-52446 bpf: Fix a race condition between btf_put() and map_free()
CVE-2023-52445 media: pvrusb2: fix use after free on context disconnection
CVE-2024-26590 erofs: fix inconsistent per-file compression format
CVE-2024-26588 LoongArch: BPF: Prevent out-of-bounds memory access
CVE-2023-52443 apparmor: avoid crash when parsed profile name is empty

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-26587

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