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CVE-2024-50076— vt: prevent kernel-infoleak in con_font_get()

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，该漏洞源于在con_font_get函数中未初始化分配的内存空间，可能导致信息泄露。

AI Predicted 5.3 Difficulty: Easy EPSS 0.61% · P48

Possible ATT&CK Techniques 1 AI

T1056.001 · Keylogging

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< efc67cee700b89ffbdb74a0603a083ec1290ae31 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< dc794e878e6d79f75205be456b1042a289c5759d affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 1e5a17dc77d8a8bbe67040b32e2ef755901aba44 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< b3959d5eca136e0588f9af3867b34032160cb826 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 23c4cb8a56978e5b1baa171d42e616e316c2039d affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< dc2d5f02636c7587bdd6d1f60fc59c55860b00a4 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< adb1f312f38f0d2c928ceaff089262798cc260b4 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< f956052e00de211b5c9ebaa1958366c23f82ee9e affected
… +10 more rows
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I. Basic Information for CVE-2024-50076

Vulnerability Information
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Vulnerability Title
vt: prevent kernel-infoleak in con_font_get()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: vt: prevent kernel-infoleak in con_font_get() font.data may not initialize all memory spaces depending on the implementation of vc->vc_sw->con_font_get. This may cause info-leak, so to prevent this, it is safest to modify it to initialize the allocated memory space to 0, and it generally does not affect the overall performance of the system.
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，该漏洞源于在con_font_get函数中未初始化分配的内存空间，可能导致信息泄露。
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 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ efc67cee700b89ffbdb74a0603a083ec1290ae31 -
Linux Linux 2.6.12 -

II. Public POCs for CVE-2024-50076

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III. Intelligence Information for CVE-2024-50076

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Patches & Fixes for CVE-2024-50076 (3)

Same Patch Batch · Linux · 2024-10-29 · 21 CVEs total

CVE-2024-50086 9.8 CRITICAL ksmbd: fix user-after-free from session log off
CVE-2024-50085 9.8 CRITICAL mptcp: pm: fix UaF read in mptcp_pm_nl_rm_addr_or_subflow
CVE-2024-50075 8.0 HIGH xhci: tegra: fix checked USB2 port number
CVE-2024-50087 7.8 HIGH btrfs: fix uninitialized pointer free on read_alloc_one_name() error
CVE-2024-50073 7.8 HIGH tty: n_gsm: Fix use-after-free in gsm_cleanup_mux
CVE-2024-50074 7.8 HIGH parport: Proper fix for array out-of-bounds access
CVE-2024-50077 7.8 HIGH Bluetooth: ISO: Fix multiple init when debugfs is disabled
CVE-2024-50078 7.8 HIGH Bluetooth: Call iso_exit() on module unload
CVE-2024-50082 7.8 HIGH blk-rq-qos: fix crash on rq_qos_wait vs. rq_qos_wake_function race
CVE-2024-50088 7.8 HIGH btrfs: fix uninitialized pointer free in add_inode_ref()
CVE-2024-50080 ublk: don't allow user copy for unprivileged device
CVE-2024-50079 io_uring/sqpoll: ensure task state is TASK_RUNNING when running task_work
CVE-2024-50081 blk-mq: setup queue ->tag_set before initializing hctx
CVE-2024-50083 tcp: fix mptcp DSS corruption due to large pmtu xmit
CVE-2024-50084 net: microchip: vcap api: Fix memory leaks in vcap_api_encode_rule_test()
CVE-2024-50072 x86/bugs: Use code segment selector for VERW operand
CVE-2024-50071 pinctrl: nuvoton: fix a double free in ma35_pinctrl_dt_node_to_map_func()
CVE-2024-50070 pinctrl: stm32: check devm_kasprintf() returned value
CVE-2024-50069 pinctrl: apple: check devm_kasprintf() returned value
CVE-2024-50068 mm/damon/tests/sysfs-kunit.h: fix memory leak in damon_sysfs_test_add_targets()

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-50076

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