CVE-2025-38537
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2025-38537
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38537.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-38537
- Downstream
- Related
- Published
- 2025-08-16T11:12:29Z
- Modified
- 2025-10-18T05:29:30.038072Z
- Summary
- net: phy: Don't register LEDs for genphy
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
net: phy: Don't register LEDs for genphy
If a PHY has no driver, the genphy driver is probed/removed directly in phyattach/detach. If the PHY's ofnode has an "leds" subnode, then the LEDs will be (un)registered when probing/removing the genphy driver. This could occur if the leds are for a non-generic driver that isn't loaded for whatever reason. Synchronously removing the PHY device in phydetach leads to the following deadlock:
rtnllock() ndoclose() ... phydetach() phyremove() phyledsunregister() ledclassdevunregister() ledtriggerset() netdevtriggerdeactivate() unregisternetdevicenotifier() rtnl_lock()
There is a corresponding deadlock on the open/register side of things (and that one is reported by lockdep), but it requires a race while this one is deterministic.
Generic PHYs do not support LEDs anyway, so don't bother registering them.
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/75e1b2079ef0653a2f7aa69be515d86b7faf1908
- https://git.kernel.org/stable/c/ec158d05eaa91b2809cab65f8068290e3c05ebdd
- https://git.kernel.org/stable/c/f0f2b992d8185a0366be951685e08643aae17d6d
- https://git.kernel.org/stable/c/fd6493533af9e5d73d0d42ff2a8ded978a701dc6
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced01e5b728e9e43ae444e0369695a5f72209906464Fixedec158d05eaa91b2809cab65f8068290e3c05ebdd
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced01e5b728e9e43ae444e0369695a5f72209906464Fixedfd6493533af9e5d73d0d42ff2a8ded978a701dc6
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced01e5b728e9e43ae444e0369695a5f72209906464Fixed75e1b2079ef0653a2f7aa69be515d86b7faf1908
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced01e5b728e9e43ae444e0369695a5f72209906464Fixedf0f2b992d8185a0366be951685e08643aae17d6d