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CVE-2026-46191— fbcon: Avoid OOB font access if console rotation fails

AI Predicted 4.7 Difficulty: Hard EPSS 0.02% · P5

Affected Version Matrix 12

VendorProductVersion RangeStatus
LinuxLinux6cc50e1c5b57180fd37a31282000f43859b0fe73< 594973a2e54924d8ba31c9faac669fc1ba6fcb80affected
6cc50e1c5b57180fd37a31282000f43859b0fe73< ab6c34b9829d5de03f1d08a47a2253729a6e7e27affected
6cc50e1c5b57180fd37a31282000f43859b0fe73< 7105d9f1387d63b15c9a860674fc92c959181f2faffected
6cc50e1c5b57180fd37a31282000f43859b0fe73< b44cc78ff46b96e72d333a3be6aaaa0a14797263affected
6cc50e1c5b57180fd37a31282000f43859b0fe73< e4ef723d8975a2694cc90733a6b888a5e2841842affected
2.6.15affected
< 2.6.15unaffected
6.6.140≤ 6.6.*unaffected
… +4 more rows
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I. Basic Information for CVE-2026-46191

Vulnerability Information
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Vulnerability Title
fbcon: Avoid OOB font access if console rotation fails
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fbcon: Avoid OOB font access if console rotation fails Clear the font buffer if the reallocation during console rotation fails in fbcon_rotate_font(). The putcs implementations for the rotated buffer will return early in this case. See [1] for an example. Currently, fbcon_rotate_font() keeps the old buffer, which is too small for the rotated font. Printing to the rotated console with a high-enough character code will overflow the font buffer. v2: - fix typos in commit message
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fbcon中控制台旋转失败时字体缓冲区未清理，导致打印高字符码时可能溢出字体缓冲区。
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 6cc50e1c5b57180fd37a31282000f43859b0fe73 ~ 594973a2e54924d8ba31c9faac669fc1ba6fcb80 -
LinuxLinux 2.6.15 -

II. Public POCs for CVE-2026-46191

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III. Intelligence Information for CVE-2026-46191

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Patches & Fixes for CVE-2026-46191 (4)

Same Patch Batch · Linux · 2026-05-28 · 138 CVEs total

CVE-2026-461359.8 CRITICALnvmet-tcp: fix race between ICReq handling and queue teardown
CVE-2026-461379.8 CRITICALmptcp: pm: ADD_ADDR rtx: fix potential data-race
CVE-2026-461959.8 CRITICALsmb: client: validate dacloffset before building DACL pointers
CVE-2026-461159.8 CRITICALblock: add pgmap check to biovec_phys_mergeable
CVE-2026-461199.1 CRITICALlibceph: Fix slab-out-of-bounds access in auth message processing
CVE-2026-461859.1 CRITICALsmb/client: fix out-of-bounds read in symlink_data()
CVE-2026-461559.1 CRITICALsmb/client: fix out-of-bounds read in smb2_compound_op()
CVE-2026-461258.8 HIGHwifi: mac80211: remove station if connection prep fails
CVE-2026-462128.8 HIGHbatman-adv: bla: prevent use-after-free when deleting claims
CVE-2026-461748.8 HIGHx86/CPU/AMD: Prevent improper isolation of shared resources in Zen2's op cache
CVE-2026-461528.8 HIGHwifi: mac80211: drop stray 'static' from fast-RX rx_result
CVE-2026-462388.8 HIGHbatman-adv: stop caching unowned originator pointers in BAT IV
CVE-2026-461668.8 HIGHwifi: mac80211: use safe list iteration in radar detect work
CVE-2026-461988.8 HIGHbatman-adv: fix integer overflow on buff_pos
CVE-2026-461138.8 HIGHKVM: x86: Fix shadow paging use-after-free due to unexpected GFN
CVE-2026-461388.1 HIGHBluetooth: hci_event: Fix OOB read and infinite loop in hci_le_create_big_complete_evt
CVE-2026-462328.1 HIGHHID: playstation: Clamp num_touch_reports
CVE-2026-461457.8 HIGHRDMA/mana: Validate rx_hash_key_len
CVE-2026-461817.8 HIGHRDMA/mlx4: Fix mis-use of RCU in mlx4_srq_event()
CVE-2026-462017.8 HIGHdrm/xe: Fix dma-buf attachment leak in xe_gem_prime_import()

Showing top 20 of 138 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-46191

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