bonding: alb: fix UAF in rlb_arp_recv during bond up/down
In the Linux kernel, the following vulnerability has been resolved: bonding: alb: fix UAF in rlb_arp_recv during bond up/down The ALB RX path may access rx_hashtbl concurrently with bond teardown. During rapid bond up/down cycles, rlb_deinitialize() frees rx_hashtbl while RX handlers are still running, leading to a null pointer dereference detected by KASAN. However, the root cause is that rlb_arp_recv() can still be accessed after setting recv_probe to NULL, which is actually a use-after-free (UAF) issue. That is the reason for using the referenced commit in the Fixes tag. [ 214.174138] Oops: general protection fault, probably for non-canonical address 0xdffffc000000001d: 0000 [#1] SMP KASAN PTI [ 214.186478] KASAN: null-ptr-deref in range [0x00000000000000e8-0x00000000000000ef] [ 214.194933] CPU: 30 UID: 0 PID: 2375 Comm: ping Kdump: loaded Not tainted 6.19.0-rc8+ #2 PREEMPT(voluntary) [ 214.205907] Hardware name: Dell Inc. PowerEdge R730/0WCJNT, BIOS 2.14.0 01/14/2022 [ 214.214357] RIP: 0010:rlb_arp_recv+0x505/0xab0 [bonding] [ 214.220320] Code: 0f 85 2b 05 00 00 48 b8 00 00 00 00 00 fc ff df 40 0f b6 ed 48 c1 e5 06 49 03 ad 78 01 00 00 48 8d 7d 28 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 06 0f 8e 12 05 00 00 80 7d 28 00 0f 84 8c 00 [ 214.241280] RSP: 0018:ffffc900073d8870 EFLAGS: 00010206 [ 214.247116] RAX: dffffc0000000000 RBX: ffff888168556822 RCX: ffff88816855681e [ 214.255082] RDX: 000000000000001d RSI: dffffc0000000000 RDI: 00000000000000e8 [ 214.263048] RBP: 0000
CVE-2026-45970
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-2026-45970
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": "3aba891dde3842d89ad022237b99c1ed308040b0",
"lessThan": "fd54ddc929be1d6c3b3b7b35d6d4642a5d9e803c",
"versionType": "git"
},
{
"status": "affected",
"version": "3aba891dde3842d89ad022237b99c1ed308040b0",
"lessThan": "de7c097800f07f3c108185c7a38b53a530ba30ff",
"versionType": "git"
},
{
"status": "affected",
"version": "3aba891dde3842d89ad022237b99c1ed308040b0",
"lessThan": "db5435b5342e3aaa4521d0f3ccfe94316b253ca1",
"versionType": "git"
},
{
"status": "affected",
"version": "3aba891dde3842d89ad022237b99c1ed308040b0",
"lessThan": "f94a0de7b9f32745a14a1621c63087a092823587",
"versionType": "git"
},
{
"status": "affected",
"version": "3aba891dde3842d89ad022237b99c1ed308040b0",
"lessThan": "c65cdf46ce340c9c00fbbaf84599d2daff43626e",
"versionType": "git"
},
{
"status": "affected",
"version": "3aba891dde3842d89ad022237b99c1ed308040b0",
"lessThan": "fef13c403be3fb685cb06419e6b3623106aab5ba",
"versionType": "git"
},
{
"status": "affected",
"version": "3aba891dde3842d89ad022237b99c1ed308040b0",
"lessThan": "d31065526f160ee0244a719230aa069daca2bf4d",
"versionType": "git"
},
{
"status": "affected",
"version": "3aba891dde3842d89ad022237b99c1ed308040b0",
"lessThan": "e6834a4c474697df23ab9948fd3577b26bf48656",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/bonding/bond_main.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.252",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.202",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.165",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.128",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.75",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.14",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.4",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/bonding/bond_main.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-45970
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40099 · Revision 1
- Added to Heist Feed
- Publisher date