net: phy: register phy led_triggers during probe to avoid AB-BA deadlock
In the Linux kernel, the following vulnerability has been resolved: net: phy: register phy led_triggers during probe to avoid AB-BA deadlock There is an AB-BA deadlock when both LEDS_TRIGGER_NETDEV and LED_TRIGGER_PHY are enabled: [ 1362.049207] [<8054e4b8>] led_trigger_register+0x5c/0x1fc <-- Trying to get lock "triggers_list_lock" via down_write(&triggers_list_lock); [ 1362.054536] [<80662830>] phy_led_triggers_register+0xd0/0x234 [ 1362.060329] [<8065e200>] phy_attach_direct+0x33c/0x40c [ 1362.065489] [<80651fc4>] phylink_fwnode_phy_connect+0x15c/0x23c [ 1362.071480] [<8066ee18>] mtk_open+0x7c/0xba0 [ 1362.075849] [<806d714c>] __dev_open+0x280/0x2b0 [ 1362.080384] [<806d7668>] __dev_change_flags+0x244/0x24c [ 1362.085598] [<806d7698>] dev_change_flags+0x28/0x78 [ 1362.090528] [<807150e4>] dev_ioctl+0x4c0/0x654 <-- Hold lock "rtnl_mutex" by calling rtnl_lock(); [ 1362.094985] [<80694360>] sock_ioctl+0x2f4/0x4e0 [ 1362.099567] [<802e9c4c>] sys_ioctl+0x32c/0xd8c [ 1362.104022] [<80014504>] syscall_common+0x34/0x58 Here LED_TRIGGER_PHY is registering LED triggers during phy_attach while holding RTNL and then taking triggers_list_lock. [ 1362.191101] [<806c2640>] register_netdevice_notifier+0x60/0x168 <-- Trying to get lock "rtnl_mutex" via rtnl_lock(); [ 1362.197073] [<805504ac>] netdev_trig_activate+0x194/0x1e4 [ 1362.202490] [<8054e28c>] led_trigger_set+0x1d4/0x360 <-- Hold lock "triggers_list_lock" by down_read(&triggers_list_lock); [ 1362.207511] [<8054eb38>] led_trigger_w
CVE-2026-23368
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-2026-23368
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": "06f502f57d0d7728f9fa0f157ec5e4111ddb98f6",
"lessThan": "2b01518eabace18f7ec8b4cafd52082303080dca",
"versionType": "git"
},
{
"status": "affected",
"version": "06f502f57d0d7728f9fa0f157ec5e4111ddb98f6",
"lessThan": "305afdd02ff3e694c165457793104710ec0728e5",
"versionType": "git"
},
{
"status": "affected",
"version": "06f502f57d0d7728f9fa0f157ec5e4111ddb98f6",
"lessThan": "c6ffc2d2338d325e1edd0c702e3ee623aa5fdc6a",
"versionType": "git"
},
{
"status": "affected",
"version": "06f502f57d0d7728f9fa0f157ec5e4111ddb98f6",
"lessThan": "c33523b8fd2d4c504ada18cd93f511f2a8f84217",
"versionType": "git"
},
{
"status": "affected",
"version": "06f502f57d0d7728f9fa0f157ec5e4111ddb98f6",
"lessThan": "241cd64cf2e32b28ead151b1795cd8fef2b6e482",
"versionType": "git"
},
{
"status": "affected",
"version": "06f502f57d0d7728f9fa0f157ec5e4111ddb98f6",
"lessThan": "2764dcb3c35de4410f642afc62cf979727470575",
"versionType": "git"
},
{
"status": "affected",
"version": "06f502f57d0d7728f9fa0f157ec5e4111ddb98f6",
"lessThan": "cde2d0b5ab5d03b5b6f17d4f654d8b30ccf36757",
"versionType": "git"
},
{
"status": "affected",
"version": "06f502f57d0d7728f9fa0f157ec5e4111ddb98f6",
"lessThan": "c8dbdc6e380e7e96a51706db3e4b7870d8a9402d",
"versionType": "git"
}
],
"programFiles": [
"drivers/net/phy/phy_device.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.16"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.16",
"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": "6.18.17",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.7",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/net/phy/phy_device.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-23368
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #27238 · Revision 1
- Added to Heist Feed
- Publisher date