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CVE-2024-40909— bpf: Fix a potential use-after-free in bpf_link_free()

EPSS 0.02% · P4
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I. Basic Information for CVE-2024-40909

Vulnerability Information
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Vulnerability Title
bpf: Fix a potential use-after-free in bpf_link_free()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix a potential use-after-free in bpf_link_free() After commit 1a80dbcb2dba, bpf_link can be freed by link->ops->dealloc_deferred, but the code still tests and uses link->ops->dealloc afterward, which leads to a use-after-free as reported by syzbot. Actually, one of them should be sufficient, so just call one of them instead of both. Also add a WARN_ON() in case of any problematic implementation.
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 bpf 组件在 bpf_link_free 函数中存在释放后重用的问题。
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 876941f533e7b47fc69977fc4551c02f2d18af97 ~ 91cff53136daeff50816b0baeafd38a6976f6209 -
LinuxLinux 6.9 -

II. Public POCs for CVE-2024-40909

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III. Intelligence Information for CVE-2024-40909

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Same Patch Batch · Linux · 2024-07-12 · 122 CVEs total

CVE-2024-40960ipv6: prevent possible NULL dereference in rt6_probe()
CVE-2024-40975platform/x86: x86-android-tablets: Unregister devices in reverse order
CVE-2024-40974powerpc/pseries: Enforce hcall result buffer validity and size
CVE-2024-40973media: mtk-vcodec: potential null pointer deference in SCP
CVE-2024-40972ext4: do not create EA inode under buffer lock
CVE-2024-40970Avoid hw_desc array overrun in dw-axi-dmac
CVE-2024-40971f2fs: remove clear SB_INLINECRYPT flag in default_options
CVE-2024-40969f2fs: don't set RO when shutting down f2fs
CVE-2024-40967serial: imx: Introduce timeout when waiting on transmitter empty
CVE-2024-40968MIPS: Octeon: Add PCIe link status check
CVE-2024-40966tty: add the option to have a tty reject a new ldisc
CVE-2024-40965i2c: lpi2c: Avoid calling clk_get_rate during transfer
CVE-2024-40964ALSA: hda: cs35l41: Possible null pointer dereference in cs35l41_hda_unbind()
CVE-2024-40963mips: bmips: BCM6358: make sure CBR is correctly set
CVE-2024-40961ipv6: prevent possible NULL deref in fib6_nh_init()
CVE-2024-40962btrfs: zoned: allocate dummy checksums for zoned NODATASUM writes
CVE-2024-40951ocfs2: fix NULL pointer dereference in ocfs2_abort_trigger()
CVE-2024-40950mm: huge_memory: fix misused mapping_large_folio_support() for anon folios
CVE-2024-40949mm: shmem: fix getting incorrect lruvec when replacing a shmem folio
CVE-2024-40952ocfs2: fix NULL pointer dereference in ocfs2_journal_dirty()

Showing top 20 of 122 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-40909

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