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CVE-2021-47086— phonet/pep: refuse to enable an unbound pipe

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phonet/pep中存在安全问题。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.23% · P12

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux bdb6e697b2a76c541960b86ab8fda88f3de1adf2< 0bbdd62ce9d44f3a22059b3d20a0df977d9f6d59 affected
bdb6e697b2a76c541960b86ab8fda88f3de1adf2< b10c7d745615a092a50c2e03ce70446d2bec2aca affected
bdb6e697b2a76c541960b86ab8fda88f3de1adf2< 311601f114859d586d5ef8833d60d3aa23282161 affected
bdb6e697b2a76c541960b86ab8fda88f3de1adf2< 982b6ba1ce626ef87e5c29f26f2401897554f235 affected
bdb6e697b2a76c541960b86ab8fda88f3de1adf2< 48c76fc53582e7f13c1e0b11c916e503256c4d0b affected
bdb6e697b2a76c541960b86ab8fda88f3de1adf2< 52ad5da8e316fa11e3a50b3f089aa63e4089bf52 affected
bdb6e697b2a76c541960b86ab8fda88f3de1adf2< 53ccdc73eedaf0e922c45b569b797d2796fbaafa affected
bdb6e697b2a76c541960b86ab8fda88f3de1adf2< 75a2f31520095600f650597c0ac41f48b5ba0068 affected
… +10 more rows
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I. Basic Information for CVE-2021-47086

Vulnerability Information
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Vulnerability Title
phonet/pep: refuse to enable an unbound pipe
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: phonet/pep: refuse to enable an unbound pipe This ioctl() implicitly assumed that the socket was already bound to a valid local socket name, i.e. Phonet object. If the socket was not bound, two separate problems would occur: 1) We'd send an pipe enablement request with an invalid source object. 2) Later socket calls could BUG on the socket unexpectedly being connected yet not bound to a valid object.
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phonet/pep中存在安全问题。
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

Vendor Product Affected Versions CPE Subscribe
Linux Linux bdb6e697b2a76c541960b86ab8fda88f3de1adf2 ~ 0bbdd62ce9d44f3a22059b3d20a0df977d9f6d59 -
Linux Linux 3.3 -

II. Public POCs for CVE-2021-47086

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III. Intelligence Information for CVE-2021-47086

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Other References for CVE-2021-47086 (7)

Same Patch Batch · Linux · 2024-03-04 · 26 CVEs total

CVE-2021-47107 9.8 CRITICAL NFSD: Fix READDIR buffer overflow
CVE-2021-47103 9.8 CRITICAL inet: fully convert sk->sk_rx_dst to RCU rules
CVE-2021-47082 7.8 HIGH tun: avoid double free in tun_free_netdev
CVE-2021-47087 7.8 HIGH tee: optee: Fix incorrect page free bug
CVE-2021-47106 7.8 HIGH netfilter: nf_tables: fix use-after-free in nft_set_catchall_destroy()
CVE-2021-47094 7.8 HIGH KVM: x86/mmu: Don't advance iterator after restart due to yielding
CVE-2021-47099 7.8 HIGH veth: ensure skb entering GRO are not cloned.
CVE-2021-47083 7.1 HIGH pinctrl: mediatek: fix global-out-of-bounds issue
CVE-2021-47102 7.1 HIGH net: marvell: prestera: fix incorrect structure access
CVE-2021-47108 drm/mediatek: hdmi: Perform NULL pointer check for mtk_hdmi_conf
CVE-2024-26622 tomoyo: fix UAF write bug in tomoyo_write_control()
CVE-2021-47105 ice: xsk: return xsk buffers back to pool when cleaning the ring
CVE-2021-47104 IB/qib: Fix memory leak in qib_user_sdma_queue_pkts()
CVE-2021-47101 asix: fix uninit-value in asix_mdio_read()
CVE-2021-47100 ipmi: Fix UAF when uninstall ipmi_si and ipmi_msghandler module
CVE-2021-47098 hwmon: (lm90) Prevent integer overflow/underflow in hysteresis calculations
CVE-2021-47097 Input: elantech - fix stack out of bound access in elantech_change_report_id()
CVE-2021-47096 ALSA: rawmidi - fix the uninitalized user_pversion
CVE-2021-47095 ipmi: ssif: initialize ssif_info->client early
CVE-2021-47093 platform/x86: intel_pmc_core: fix memleak on registration failure

Showing top 20 of 26 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2021-47086

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