CVE-2026-31546 - Vulnerability Details

Vendors	Products
Linux Subscribe	Linux Kernel Subscribe

Link	Providers
https://git.kernel.org/stable/c/017d674cf6930e9586a29ee808c7ca09d1396d07
https://git.kernel.org/stable/c/0a3f8cd3f370247ded14d38d216b49dd30eade76
https://git.kernel.org/stable/c/19f0fd87df0e5746b24f5caa465a66a8c6e6e241
https://git.kernel.org/stable/c/2ec2c777f357a83c3d503d8d9370c90b60f0ae63
https://git.kernel.org/stable/c/605b52497bf89b3b154674deb135da98f916e390
https://git.kernel.org/stable/c/6a3bb74e25d79cbb15f67ef80f71e2b2bfe27ff4
https://git.kernel.org/stable/c/ec9762f0df2f9fbe3f40a3bfa8aab8b2f721466c
https://git.kernel.org/stable/c/edacf1613f7b26423ebfa8b2892e7453c4235354

Type	Values Removed	Values Added
Description		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.
Title		net: bonding: fix NULL deref in bond_debug_rlb_hash_show
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/017d674cf6930e9586a29ee808c7ca09d1396d07 https://git.kernel.org/stable/c/0a3f8cd3f370247ded14d38d216b49dd30eade76 https://git.kernel.org/stable/c/19f0fd87df0e5746b24f5caa465a66a8c6e6e241 https://git.kernel.org/stable/c/2ec2c777f357a83c3d503d8d9370c90b60f0ae63 https://git.kernel.org/stable/c/605b52497bf89b3b154674deb135da98f916e390 https://git.kernel.org/stable/c/6a3bb74e25d79cbb15f67ef80f71e2b2bfe27ff4 https://git.kernel.org/stable/c/ec9762f0df2f9fbe3f40a3bfa8aab8b2f721466c https://git.kernel.org/stable/c/edacf1613f7b26423ebfa8b2892e7453c4235354

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31546", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.114Z", "datePublished": "2026-04-24T14:33:14.572Z", "dateUpdated": "2026-04-24T14:33:14.572Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-04-24T14:33:14.572Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bonding: fix NULL deref in bond_debug_rlb_hash_show\n\nrlb_clear_slave intentionally keeps RLB hash-table entries on\nthe rx_hashtbl_used_head list with slave set to NULL when no\nreplacement slave is available. However, bond_debug_rlb_hash_show\nvisites client_info->slave without checking if it's NULL.\n\nOther used-list iterators in bond_alb.c already handle this NULL-slave\nstate safely:\n\n- rlb_update_client returns early on !client_info->slave\n- rlb_req_update_slave_clients, rlb_clear_slave, and rlb_rebalance\ncompare slave values before visiting\n- lb_req_update_subnet_clients continues if slave is NULL\n\nThe following NULL deref crash can be trigger in\nbond_debug_rlb_hash_show:\n\n[ 1.289791] BUG: kernel NULL pointer dereference, address: 0000000000000000\n[ 1.292058] RIP: 0010:bond_debug_rlb_hash_show (drivers/net/bonding/bond_debugfs.c:41)\n[ 1.293101] RSP: 0018:ffffc900004a7d00 EFLAGS: 00010286\n[ 1.293333] RAX: 0000000000000000 RBX: ffff888102b48200 RCX: ffff888102b48204\n[ 1.293631] RDX: ffff888102b48200 RSI: ffffffff839daad5 RDI: ffff888102815078\n[ 1.293924] RBP: ffff888102815078 R08: ffff888102b4820e R09: 0000000000000000\n[ 1.294267] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888100f929c0\n[ 1.294564] R13: ffff888100f92a00 R14: 0000000000000001 R15: ffffc900004a7ed8\n[ 1.294864] FS: 0000000001395380(0000) GS:ffff888196e75000(0000) knlGS:0000000000000000\n[ 1.295239] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 1.295480] CR2: 0000000000000000 CR3: 0000000102adc004 CR4: 0000000000772ef0\n[ 1.295897] Call Trace:\n[ 1.296134] seq_read_iter (fs/seq_file.c:231)\n[ 1.296341] seq_read (fs/seq_file.c:164)\n[ 1.296493] full_proxy_read (fs/debugfs/file.c:378 (discriminator 1))\n[ 1.296658] vfs_read (fs/read_write.c:572)\n[ 1.296981] ksys_read (fs/read_write.c:717)\n[ 1.297132] do_syscall_64 (arch/x86/entry/syscall_64.c:63 (discriminator 1) arch/x86/entry/syscall_64.c:94 (discriminator 1))\n[ 1.297325] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\n\nAdd a NULL check and print \"(none)\" for entries with no assigned slave."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/bonding/bond_debugfs.c"], "versions": [{"version": "caafa84251b886feb6cdf23d50e2cc99dcdaaaf3", "lessThan": "19f0fd87df0e5746b24f5caa465a66a8c6e6e241", "status": "affected", "versionType": "git"}, {"version": "caafa84251b886feb6cdf23d50e2cc99dcdaaaf3", "lessThan": "edacf1613f7b26423ebfa8b2892e7453c4235354", "status": "affected", "versionType": "git"}, {"version": "caafa84251b886feb6cdf23d50e2cc99dcdaaaf3", "lessThan": "2ec2c777f357a83c3d503d8d9370c90b60f0ae63", "status": "affected", "versionType": "git"}, {"version": "caafa84251b886feb6cdf23d50e2cc99dcdaaaf3", "lessThan": "0a3f8cd3f370247ded14d38d216b49dd30eade76", "status": "affected", "versionType": "git"}, {"version": "caafa84251b886feb6cdf23d50e2cc99dcdaaaf3", "lessThan": "6a3bb74e25d79cbb15f67ef80f71e2b2bfe27ff4", "status": "affected", "versionType": "git"}, {"version": "caafa84251b886feb6cdf23d50e2cc99dcdaaaf3", "lessThan": "017d674cf6930e9586a29ee808c7ca09d1396d07", "status": "affected", "versionType": "git"}, {"version": "caafa84251b886feb6cdf23d50e2cc99dcdaaaf3", "lessThan": "ec9762f0df2f9fbe3f40a3bfa8aab8b2f721466c", "status": "affected", "versionType": "git"}, {"version": "caafa84251b886feb6cdf23d50e2cc99dcdaaaf3", "lessThan": "605b52497bf89b3b154674deb135da98f916e390", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/bonding/bond_debugfs.c"], "versions": [{"version": "2.6.38", "status": "affected"}, {"version": "0", "lessThan": "2.6.38", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.253", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.167", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.130", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.78", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.20", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.10", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "5.10.253"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "5.15.203"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.1.167"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.6.130"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.12.78"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.18.20"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "6.19.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.38", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/19f0fd87df0e5746b24f5caa465a66a8c6e6e241"}, {"url": "https://git.kernel.org/stable/c/edacf1613f7b26423ebfa8b2892e7453c4235354"}, {"url": "https://git.kernel.org/stable/c/2ec2c777f357a83c3d503d8d9370c90b60f0ae63"}, {"url": "https://git.kernel.org/stable/c/0a3f8cd3f370247ded14d38d216b49dd30eade76"}, {"url": "https://git.kernel.org/stable/c/6a3bb74e25d79cbb15f67ef80f71e2b2bfe27ff4"}, {"url": "https://git.kernel.org/stable/c/017d674cf6930e9586a29ee808c7ca09d1396d07"}, {"url": "https://git.kernel.org/stable/c/ec9762f0df2f9fbe3f40a3bfa8aab8b2f721466c"}, {"url": "https://git.kernel.org/stable/c/605b52497bf89b3b154674deb135da98f916e390"}], "title": "net: bonding: fix NULL deref in bond_debug_rlb_hash_show", "x_generator": {"engine": "bippy-1.2.0"}}}}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: bonding: fix NULL deref in bond_debug_rlb_hash_show\n\nrlb_clear_slave intentionally keeps RLB hash-table entries on\nthe rx_hashtbl_used_head list with slave set to NULL when no\nreplacement slave is available. However, bond_debug_rlb_hash_show\nvisites client_info->slave without checking if it's NULL.\n\nOther used-list iterators in bond_alb.c already handle this NULL-slave\nstate safely:\n\n- rlb_update_client returns early on !client_info->slave\n- rlb_req_update_slave_clients, rlb_clear_slave, and rlb_rebalance\ncompare slave values before visiting\n- lb_req_update_subnet_clients continues if slave is NULL\n\nThe following NULL deref crash can be trigger in\nbond_debug_rlb_hash_show:\n\n[ 1.289791] BUG: kernel NULL pointer dereference, address: 0000000000000000\n[ 1.292058] RIP: 0010:bond_debug_rlb_hash_show (drivers/net/bonding/bond_debugfs.c:41)\n[ 1.293101] RSP: 0018:ffffc900004a7d00 EFLAGS: 00010286\n[ 1.293333] RAX: 0000000000000000 RBX: ffff888102b48200 RCX: ffff888102b48204\n[ 1.293631] RDX: ffff888102b48200 RSI: ffffffff839daad5 RDI: ffff888102815078\n[ 1.293924] RBP: ffff888102815078 R08: ffff888102b4820e R09: 0000000000000000\n[ 1.294267] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888100f929c0\n[ 1.294564] R13: ffff888100f92a00 R14: 0000000000000001 R15: ffffc900004a7ed8\n[ 1.294864] FS: 0000000001395380(0000) GS:ffff888196e75000(0000) knlGS:0000000000000000\n[ 1.295239] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[ 1.295480] CR2: 0000000000000000 CR3: 0000000102adc004 CR4: 0000000000772ef0\n[ 1.295897] Call Trace:\n[ 1.296134] seq_read_iter (fs/seq_file.c:231)\n[ 1.296341] seq_read (fs/seq_file.c:164)\n[ 1.296493] full_proxy_read (fs/debugfs/file.c:378 (discriminator 1))\n[ 1.296658] vfs_read (fs/read_write.c:572)\n[ 1.296981] ksys_read (fs/read_write.c:717)\n[ 1.297132] do_syscall_64 (arch/x86/entry/syscall_64.c:63 (discriminator 1) arch/x86/entry/syscall_64.c:94 (discriminator 1))\n[ 1.297325] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:130)\n\nAdd a NULL check and print \"(none)\" for entries with no assigned slave."}], "id": "CVE-2026-31546", "lastModified": "2026-04-24T17:51:40.810", "metrics": {}, "published": "2026-04-24T15:16:28.690", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/017d674cf6930e9586a29ee808c7ca09d1396d07"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0a3f8cd3f370247ded14d38d216b49dd30eade76"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/19f0fd87df0e5746b24f5caa465a66a8c6e6e241"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2ec2c777f357a83c3d503d8d9370c90b60f0ae63"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/605b52497bf89b3b154674deb135da98f916e390"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6a3bb74e25d79cbb15f67ef80f71e2b2bfe27ff4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ec9762f0df2f9fbe3f40a3bfa8aab8b2f721466c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/edacf1613f7b26423ebfa8b2892e7453c4235354"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

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