SECUFOCUSNOW
Home›CVE index›CVE-2026-46260
Review reviewHigh

CVE-2026-46260

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: ipv6: Fix out-of-bound access in fib6_add_rt2node(). syzbot reported out-of-bound read in fib6_add_rt2node(). [0] When IPv6 route is created with RTA_NH_ID, struct fib6_info does not have the trailing struct fib6_nh. The cited commit started to check !iter->fib6_nh->fib_nh_gw_family to ensure that rt6_qualify_for_ecmp() will return false for iter. If iter->nh is not NULL, rt6_qualify_for_ecmp() returns false anyway. Let's check iter->nh before reading iter->fib6_nh and avoid OOB read. [0]: BUG: KASAN: slab-out-of-bounds in...

CVSS
7.8
EPSS
0.12%
2.14% percentile
CISA KEV
Not listed
Published
2026.06.04
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.12%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: ipv6: Fix out-of-bound access in fib6_add_rt2node(). syzbot reported out-of-bound read in fib6_add_rt2node(). [0] When IPv6 route is created with RTA_NH_ID, struct fib6_info does not have the trailing struct fib6_nh. The cited commit started to check !iter->fib6_nh->fib_nh_gw_family to ensure that rt6_qualify_for_ecmp() will return false for iter. If iter->nh is not NULL, rt6_qualify_for_ecmp() returns false anyway. Let's check iter->nh before reading iter->fib6_nh and avoid OOB read. [0]: BUG: KASAN: slab-out-of-bounds in...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 50b7c7a255858a85c4636a1e990ca04591153dca < bcc60ad129ae1837cf809c81bff56ec8bfdb6b11, >= d8143c54ceeba232dc8a13aa0afa14a44b371d93 < bf5009a06e03ee9a51052bb59f2228a5e4e66260, >= b8ad2d53f706aeea833d23d45c0758398fede580 < 03b5051e02f5a3772eee57493ad697d4b505b0c2, >= bbf4a17ad9ffc4e3d7ec13d73ecd59dea149ed25 < 500e54615c97bc3c427e52305a6fcd38a0e008a3, >= bbf4a17ad9ffc4e3d7ec13d73ecd59dea149ed25 < 8244f959e2c125c849e569f5b23ed49804cce695, >= 6.6.124 < 6.6.128, >= 6.12.70 < 6.12.75, >= 6.18.10 < 6.18.14, >= 6.19, >= 6.19.1 < 6.19.4, 6.19
Fixed versions
6.6.128, 6.12.75, 6.18.14, 6.19.4

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-125