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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-53069 Detail

Description

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 never opened: bpf_master_redirect_enabled_key is a global static key, so as soon as any bond device has native XDP attached, the XDP_TX -> xdp_master_redirect() interception is enabled for every slave system-wide. The path xdp_master_redirect() -> bond_xdp_get_xmit_slave() -> bond_xdp_xmit_roundrobin_slave_get() -> bond_rr_gen_slave_id() then runs against a bond that has no rr_tx_counter and crashes. Fix this in the generic xdp_master_redirect() by refusing to call into the master's ->ndo_xdp_get_xmit_slave() when the master device is not up. IFF_UP is only set after ->ndo_open() has successfully returned, so this reliably excludes masters whose XDP state has not been fully initialized. Drop the frame with XDP_ABORTED so the exception is visible via trace_xdp_exception() rather than silently falling through. This is not specific to bonding: any current or future master that defers XDP state allocation to ->ndo_open() is protected.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
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NVD assessment not yet provided.

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/183128da0406b1c10e6f60b7b9fe70788b9c8c1d kernel.org
https://git.kernel.org/stable/c/1921f91298d1388a0bb9db8f83800c998b649cb3 kernel.org
https://git.kernel.org/stable/c/3128b294b426533c8d9162187446d93a8a160359 kernel.org
https://git.kernel.org/stable/c/7bad93e99737e4a5c0c14ac50c05152cf4e28022 kernel.org
https://git.kernel.org/stable/c/866d3d9b87751b1944168fd82615505e0c0fd6cf kernel.org
https://git.kernel.org/stable/c/acbf45bd584d924b320bee2a7fe2a26f64904d95 kernel.org
https://git.kernel.org/stable/c/ea690b3b6e58ae00979af8195b4cc24df466b65e kernel.org

Weakness Enumeration

CWE-ID CWE Name Source

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-53069
NVD Published Date:
06/24/2026
NVD Last Modified:
06/24/2026
Source:
kernel.org