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Echo: linux: security update to 6.1.180-1

high Tenable Cloud Security Plugin ID 463956

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - In the Linux kernel, the following vulnerability has been resolved: fbdev: fbcon: fix out-of-bounds read
 in err_out of fbcon_do_set_font() When fbcon_do_set_font() fails (e.g., due to a memory allocation failure
 inside vc_resize() under heavy memory pressure), it jumps to the `err_out` label to roll back the console
 state. However, the current rollback logic forgets to restore the `hi_font` state, leading to a severe
 state machine corruption. Earlier in the function, `set_vc_hi_font()` might be called to change
 `vc->vc_hi_font_mask` and mutate the screen buffer. If `vc_resize()` subsequently fails, the `err_out`
 path restores `vc_font.charcount` but entirely skips rolling back the `vc_hi_font_mask` and the screen
 buffer. This mismatch leaves the terminal in a desynchronized state. Because `vc_hi_font_mask` remains
 set, the VT subsystem will still accept character indices greater than 255 from userspace and write them
 to the screen buffer. Subsequent rendering calls (e.g., `fbcon_putcs()`) will then use these inflated
 indices to access the reverted, 256-character font array, leading to a deterministic out-of-bounds read
 and potential kernel memory disclosure. Fix this by adding the missing rollback logic for the `hi_font`
 mask and screen buffer in the error path. (CVE-2026-53402)

Solution

Update the linux library and its related packages to version 6.1.180-1 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-53402

Plugin Details

Severity: High

ID: 463956

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.6

CVSS v2

Risk Factor: Medium

Base Score: 6.2

Temporal Score: 4.6

Vector: CVSS2#AV:L/AC:L/Au:S/C:C/I:N/A:C

CVSS Score Source: CVE-2026-53402

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.2

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 7/19/2026

Vulnerability Publication Date: 7/19/2026

Reference Information

CVE: CVE-2026-53402