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Review reviewHigh

CVE-2026-53069

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: net, bpf: fix null-ptr-deref in xdp_master_redirect() for down master syzkaller reported a kernel panic in bond_rr_gen_slave_id() reached via xdp_master_redirect(). Full decoded trace: https://syzkaller.appspot.com/bug?extid=80e046b8da2820b6ba73 bond_rr_gen_slave_id() dereferences bond->rr_tx_counter, a per-CPU counter that bonding only allocates in bond_open() when the mode is round-robin. If the bond device was never brought up, rr_tx_counter stays NULL. The XDP redirect path can still reach that code on a bond that was n...

CVSS
7.5
EPSS
0.38%
30.6% percentile
CISA KEV
Not listed
Published
2026.06.25
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.38%
Technical severityCVSS 7.5

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: net, bpf: fix null-ptr-deref in xdp_master_redirect() for down master syzkaller reported a kernel panic in bond_rr_gen_slave_id() reached via xdp_master_redirect(). Full decoded trace: https://syzkaller.appspot.com/bug?extid=80e046b8da2820b6ba73 bond_rr_gen_slave_id() dereferences bond->rr_tx_counter, a per-CPU counter that bonding only allocates in bond_open() when the mode is round-robin. If the bond device was never brought up, rr_tx_counter stays NULL. The XDP redirect path can still reach that code on a bond that was n...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 879af96ffd72706c6e3278ea6b45b0b0e37ec5d7 < 3128b294b426533c8d9162187446d93a8a160359, >= 879af96ffd72706c6e3278ea6b45b0b0e37ec5d7 < acbf45bd584d924b320bee2a7fe2a26f64904d95, >= 879af96ffd72706c6e3278ea6b45b0b0e37ec5d7 < 866d3d9b87751b1944168fd82615505e0c0fd6cf, >= 879af96ffd72706c6e3278ea6b45b0b0e37ec5d7 < 183128da0406b1c10e6f60b7b9fe70788b9c8c1d, >= 879af96ffd72706c6e3278ea6b45b0b0e37ec5d7 < 7bad93e99737e4a5c0c14ac50c05152cf4e28022, >= 879af96ffd72706c6e3278ea6b45b0b0e37ec5d7 < ea690b3b6e58ae00979af8195b4cc24df466b65e, >= 879af96ffd72706c6e3278ea6b45b0b0e37ec5d7 < 1921f91298d1388a0bb9db8f83800c998b649cb3, >= 5.15, >= 5.15 < 5.15.209, >= 5.16 < 6.1.175, >= 6.2 < 6.6.141, >= 6.7 < 6.12.91, >= 6.13 < 6.18.33, >= 6.19 < 7.0.10
Fixed versions
5.15.209, 6.1.175, 6.6.141, 6.12.91, 6.18.33, 7.0.10

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:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE
CWE-476