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CVE-2026-53069— net, bpf: fix null-ptr-deref in xdp_master_redirect() for down master

CVSS 7.5 · High EPSS 0.39% · P30

Affected Version Matrix 16

VendorProductVersion RangeStatus
LinuxLinux879af96ffd72706c6e3278ea6b45b0b0e37ec5d7< 3128b294b426533c8d9162187446d93a8a160359affected
879af96ffd72706c6e3278ea6b45b0b0e37ec5d7< acbf45bd584d924b320bee2a7fe2a26f64904d95affected
879af96ffd72706c6e3278ea6b45b0b0e37ec5d7< 866d3d9b87751b1944168fd82615505e0c0fd6cfaffected
879af96ffd72706c6e3278ea6b45b0b0e37ec5d7< 183128da0406b1c10e6f60b7b9fe70788b9c8c1daffected
879af96ffd72706c6e3278ea6b45b0b0e37ec5d7< 7bad93e99737e4a5c0c14ac50c05152cf4e28022affected
879af96ffd72706c6e3278ea6b45b0b0e37ec5d7< ea690b3b6e58ae00979af8195b4cc24df466b65eaffected
879af96ffd72706c6e3278ea6b45b0b0e37ec5d7< 1921f91298d1388a0bb9db8f83800c998b649cb3affected
5.15affected
… +8 more rows
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I. Basic Information for CVE-2026-53069

Vulnerability Information
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Vulnerability Title
net, bpf: fix null-ptr-deref in xdp_master_redirect() for down master
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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基金会开源的操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于在xdp_master_redirect()中对关闭的主设备处理不当，当bond设备未启动时rr_tx_counter为空指针，可能导致空指针取消引用的内核崩溃。
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 879af96ffd72706c6e3278ea6b45b0b0e37ec5d7 ~ 3128b294b426533c8d9162187446d93a8a160359 -
LinuxLinux 5.15 -

II. Public POCs for CVE-2026-53069

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III. Intelligence Information for CVE-2026-53069

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Patches & Fixes for CVE-2026-53069 (7)

Same Patch Batch · Linux · 2026-06-24 · 219 CVEs total

CVE-2026-529829.8 CRITICALnet: usb: rtl8150: fix use-after-free in rtl8150_start_xmit()
CVE-2026-530469.8 CRITICALksmbd: fix use-after-free from async crypto on Qualcomm crypto engine
CVE-2026-529559.8 CRITICALlibceph: Fix potential out-of-bounds access in crush_decode()
CVE-2026-530459.8 CRITICALmemory: tegra124-emc: Fix dll_change check
CVE-2026-530499.8 CRITICALgfs2: add some missing log locking
CVE-2026-530109.8 CRITICALksmbd: fix use-after-free in smb2_open during durable reconnect
CVE-2026-530889.8 CRITICALnet: bcmgenet: fix off-by-one in bcmgenet_put_txcb
CVE-2026-530069.8 CRITICALipv6: fix possible UAF in icmpv6_rcv()
CVE-2026-530559.8 CRITICALcrypto: hisilicon/sec2 - prevent req used-after-free for sec
CVE-2026-530029.8 CRITICALnetfilter: conntrack: remove sprintf usage
CVE-2026-530869.8 CRITICALnet: bcmgenet: fix racing timeout handler
CVE-2026-529149.8 CRITICALbatman-adv: fix fragment reassembly length accounting
CVE-2026-529939.8 CRITICALtipc: fix double-free in tipc_buf_append()
CVE-2026-529319.8 CRITICALbatman-adv: tp_meter: avoid use of uninit sender vars
CVE-2026-529899.8 CRITICALnvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers
CVE-2026-529249.8 CRITICALsctp: purge outqueue on stale COOKIE-ECHO handling
CVE-2026-529869.8 CRITICALnetfilter: nf_conntrack_sip: don't use simple_strtoul
CVE-2026-529999.1 CRITICALnetfilter: nfnetlink_osf: fix out-of-bounds read on option matching
CVE-2026-529589.1 CRITICALlibceph: Fix potential out-of-bounds access in osdmap_decode()
CVE-2026-530439.1 CRITICALocfs2/dlm: validate qr_numregions in dlm_match_regions()

Showing top 20 of 219 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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