CVE-2026-98008net: macb: fix NULL pointer dereference on unbind with fixed-link
- —Not scoredno CVSS score yet
- 0.17%Exploitation in 30 daysEPSS · top 93% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: net: macb: fix NULL pointer dereference on unbind with fixed-link When the device tree describes a fixed-link and has no "mdio" child node, macb_mii_init() returns early without allocating the MDIO bus, leaving bp->mii_bus as NULL. Two cleanup paths then dereference this NULL bus: 1. On driver unbind, macb_remove() unconditionally calls mdiobus_unregister(bp->mii_bus), which oopses: Unable to handle kernel NULL pointer dereference at virtual address 00000000000004a8 pc : mdiobus_unregister+0x14/0xa4 lr : macb_remove+0x38/0xa4 Call trace: mdiobus_unregister+0x14/0xa4 (P) macb_remove+0x38/0xa4 platform_remove+0x20/0x30 device_release_driver_internal+0x1c8/0x224 unbind_store+0xb4/0xbc 2. On the probe error path in macb_probe(), reached when macb_mii_init() has succeeded but a subsequent step fails, the err_out_unregister_mdio label runs the same unconditional cleanup. mdiobus_unregister() and mdiobus_free() do not guard against a NULL bus, so guard the calls in both macb_remove() and the probe error path.
Timeline
ID reserved
By Linux
Published
- 24 days later
· 24 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.17% · top 93% of all CVEs (14 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 831e19e565b5210930fa183730071f8290c61263 – < afa224cabc0132ca414b9141b1a919ca2d318cd0
- affected 81db1e52848694761a1aa162ce76198af9964ed8 – < 054ad8e66025eb4778d840bef80c270646cebcd2
- affected d0c3601f2c4e12e7689b0f46ebc17525250ea8c3 – < f737d999fcb8f276d77b01ea4c2016ee01dad19b
- affected d0c3601f2c4e12e7689b0f46ebc17525250ea8c3 – < 5710f6a74f63cbba0e15cd75917234916181c9d4
- affected d0c3601f2c4e12e7689b0f46ebc17525250ea8c3 – < edb39c7666bb3924da761dfb417db85c1e5d8ad3
- affected d0c3601f2c4e12e7689b0f46ebc17525250ea8c3 – < 38b6be101006d3e7af972999f45d4f1e8250587a
- affected cafa5942bd2df3d80e3eeb2deb4bc050f7761f3d
- affected c81dcaa9cd0b66816c2ecb6c5df0b6afde9c7da5
- affected 19088c5378c9fea54e552d8bc7418a3aa1e06990
- affected 6.1.114 – < 6.1.189
- affected 6.6.58 – < 6.6.158
- affected 5.10.228 – < 5.11
- affected 5.15.169 – < 5.16
- affected 6.11.5 – < 6.12
- affected 6.12
- unaffected < 6.12
- unaffected 6.1.189 – ≤ 6.1.*
- unaffected 6.6.158 – ≤ 6.6.*
- unaffected 6.12.111 – ≤ 6.12.*
- unaffected 6.18.53 – ≤ 6.18.*
- unaffected 7.2.7 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References6
- https://git.kernel.org/stable/c/afa224cabc0132ca414b9141b1a919ca2d318cd0 (opens in a new tab)
- https://git.kernel.org/stable/c/054ad8e66025eb4778d840bef80c270646cebcd2 (opens in a new tab)
- https://git.kernel.org/stable/c/f737d999fcb8f276d77b01ea4c2016ee01dad19b (opens in a new tab)
- https://git.kernel.org/stable/c/5710f6a74f63cbba0e15cd75917234916181c9d4 (opens in a new tab)
- https://git.kernel.org/stable/c/edb39c7666bb3924da761dfb417db85c1e5d8ad3 (opens in a new tab)
- https://git.kernel.org/stable/c/38b6be101006d3e7af972999f45d4f1e8250587a (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-86661 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-98008)Record last updated .