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: 00000000
CVE-2026-31546
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-31546
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "caafa84251b886feb6cdf23d50e2cc99dcdaaaf3",
"lessThan": "19f0fd87df0e5746b24f5caa465a66a8c6e6e241",
"versionType": "git"
},
{
"status": "affected",
"version": "caafa84251b886feb6cdf23d50e2cc99dcdaaaf3",
"lessThan": "edacf1613f7b26423ebfa8b2892e7453c4235354",
"versionType": "git"
},
{
"status": "affected",
"version": "caafa84251b886feb6cdf23d50e2cc99dcdaaaf3",
"lessThan": "2ec2c777f357a83c3d503d8d9370c90b60f0ae63",
"versionType": "git"
},
{
"status": "affected",
"version": "caafa84251b886feb6cdf23d50e2cc99dcdaaaf3",
"lessThan": "0a3f8cd3f370247ded14d38d216b49dd30eade76",
"versionType": "git"
},
{
"status": "affected",
"version": "caafa84251b886feb6cdf23d50e2cc99dcdaaaf3",
"lessThan": "6a3bb74e25d79cbb15f67ef80f71e2b2bfe27ff4",
"versionType": "git"
},
{
"status": "affected",
"version": "caafa84251b886feb6cdf23d50e2cc99dcdaaaf3",
"lessThan": "017d674cf6930e9586a29ee808c7ca09d1396d07",
"versionType": "git"
},
{
"status": "affected",
"version": "caafa84251b886feb6cdf23d50e2cc99dcdaaaf3",
"lessThan": "ec9762f0df2f9fbe3f40a3bfa8aab8b2f721466c",
"versionType": "git"
},
{
"status": "affected",
"version": "caafa84251b886feb6cdf23d50e2cc99dcdaaaf3",
"lessThan": "605b52497bf89b3b154674deb135da98f916e390",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/bonding/bond_debugfs.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "2.6.38"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "2.6.38",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.253",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.203",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.167",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.130",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.78",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.20",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.10",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/bonding/bond_debugfs.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-31546
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #28293 · Revision 1
- Added to Heist Feed
- Publisher date