CVE-2026-31546: Linux vulnerability

CVE-2026-31546: net: bonding: fix NULL deref in bond_debug_rlb_hash_show

In the Linux kernel, the following vulnerability has been resolved: net: bonding: fix NULL deref in bond_debug_rlb_hash_show rlb_clear_slave intentionally keeps RLB hash-table entries on the rx_hashtbl_used_head list with slave set to NULL when no replacement slave is available. However, bond_debug_rlb_hash_show visites client_info->slave without checking if it's NULL. Other used-list iterators in bond_alb.c already handle this NULL-slave state safely: - rlb_update_client returns early on !client_info->slave - rlb_req_update_slave_clients, rlb_clear_slave, and rlb_rebalance compare slave values before visiting - lb_req_update_subnet_clients continues if slave is NULL The following NULL deref crash can be trigger in bond_debug_rlb_hash_show: [ 1.289791] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 1.292058] RIP: 0010:bond_debug_rlb_hash_show (drivers/net/bonding/bond_debugfs.c:41) [ 1.293101] RSP: 0018:ffffc900004a7d00 EFLAGS: 00010286 [ 1.293333] RAX: 0000000000000000 RBX: ffff888102b48200 RCX: ffff888102b48204 [ 1.293631] RDX: ffff888102b48200 RSI: ffffffff839daad5 RDI: ffff888102815078 [ 1.293924] RBP: ffff888102815078 R08: ffff888102b4820e R09: 0000000000000000 [ 1.294267] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888100f929c0 [ 1.294564] R13: ffff888100f92a00 R14: 0000000000000001 R15: ffffc900004a7ed8 [ 1.294864] FS: 0000000001395380(0000) GS:ffff888196e75000(0000) knlGS:0000000000000000 [ 1.295239] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1.295480] CR2: 0000000000000000 CR3: 0000000102adc004 CR4: 0000000000772ef0 [ 1.295897] Call Trace: [ 1.296134] seq_read_iter (fs/seq_file.c:231) [ 1.296341] seq_read (fs/seq_file.c:164) [ 1.296493] full_proxy_read (fs/debugfs/file.c:378 (discriminator 1)) [ 1.296658] vfs_read (fs/read_write.c:572) [ 1.296981] ksys_read (fs/read_write.c:717) [ 1.297132] do_syscall_64 (arch/x86/entry/syscall_64.c:63 (discriminator 1) arch/x86/entry/syscall_64.c:94 (discriminator 1)) [ 1.297325] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130) Add a NULL check and print "(none)" for entries with no assigned slave.

UnknownCVSS not scoredNot KEV-listedUpdatedOct 15, 2026, 01:16 UTC (UTC+00:00)

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Vulnerability profileCVE Program record

Severity: Unknown
CVSS: Not scored
Known Exploited: No
Published: Apr 24, 2026, 14:33 UTC (UTC+00:00)

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors

3Timeline events

1ADP providers

12Source links

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
Mar 9, 2026, 15:48 UTC (UTC+00:00)
CVE publishedCVE Program
The CVE record was published.
Apr 24, 2026, 14:33 UTC (UTC+00:00)
CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
Oct 15, 2026, 01:16 UTC (UTC+00:00)

ADP provider summaries

Source materials

CVE List V5 sourceCVE List V5
https://git.kernel.org/stable/c/19f0fd87df0e5746b24f5caa465a66a8c6e6e241CVE reference, Linux
https://git.kernel.org/stable/c/edacf1613f7b26423ebfa8b2892e7453c4235354CVE reference, Linux
https://git.kernel.org/stable/c/2ec2c777f357a83c3d503d8d9370c90b60f0ae63CVE reference, Linux
https://git.kernel.org/stable/c/0a3f8cd3f370247ded14d38d216b49dd30eade76CVE reference, Linux
https://git.kernel.org/stable/c/6a3bb74e25d79cbb15f67ef80f71e2b2bfe27ff4CVE reference, Linux
https://git.kernel.org/stable/c/017d674cf6930e9586a29ee808c7ca09d1396d07CVE reference, Linux
https://git.kernel.org/stable/c/ec9762f0df2f9fbe3f40a3bfa8aab8b2f721466cCVE reference, Linux
https://git.kernel.org/stable/c/605b52497bf89b3b154674deb135da98f916e390CVE reference, Linux
https://cert-portal.siemens.com/productcert/html/ssa-082556.htmlCVE reference, siemens-SADP
https://cert-portal.siemens.com/productcert/html/ssa-019113.htmlCVE reference, siemens-SADP
https://cert-portal.siemens.com/productcert/html/ssa-457936.htmlCVE reference, siemens-SADP

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus

LinuxLinuxcaafa84251b886feb6cdf23d50e2cc99dcdaaaf3, caafa84251b886feb6cdf23d50e2cc99dcdaaaf3, caafa84251b886feb6cdf23d50e2cc99dcdaaaf3, caafa84251b886feb6cdf23d50e2cc99dcdaaaf3, caafa84251b886feb6cdf23d50e2cc99dcdaaaf3, caafa84251b886feb6cdf23d50e2cc99dcdaaaf3, caafa84251b886feb6cdf23d50e2cc99dcdaaaf3, caafa84251b886feb6cdf23d50e2cc99dcdaaaf3unaffected

LinuxLinux2.6.38, 0, 5.10.253, 5.15.203, 6.1.167, 6.6.130, 6.12.78, 6.18.20, 6.19.10, 7.0affected

Weakness

CWE details

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