ima: Fix use-after-free on a dentry's dname.name
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 4 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.
Summary
In the Linux kernel, the following vulnerability has been resolved: ima: Fix use-after-free on a dentry's dname.name ->d_name.name can change on rename and the earlier value can be freed; there are conditions sufficient to stabilize it (->d_lock on dentry, ->d_lock on its parent, ->i_rwsem exclusive on the parent's inode, rename_lock), but none of those are met at any of the sites. Take a stable snapshot of the name instead.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 3.7 and later | 5.4.291, 5.10.235, 5.15.174, 6.1.97, 6.6.35, 6.9.6, 6.10 | Patch available | CNA |
- Linux VendorLinux Affected 3.7 and later Fixed in 5.4.291, 5.10.235, 5.15.174, 6.1.97, 6.6.35, 6.9.6, 6.10 Patch available CNA
CPE configurations NVD · 2
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.4.291, 5.10.235, 5.15.174, 6.1.97, 6.6.35, 6.9.6, 6.10
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix planned: Will not fix |
| Red Hat Enterprise Linux 9 | Affected | No fix planned: Will not fix |
Timeline
- 2026-10-02 Threatist record created from CVE-2024-39494
- 2026-10-03 Alias added: GHSA-2938-5hf8-58m3
References
Patch 7
- https://git.kernel.org/stable/c/480afcbeb7aaaa22677d3dd48ec590b441eaac1a
- https://git.kernel.org/stable/c/edf287bc610b18d7a9c0c0c1cb2e97b9348c71bb
- https://git.kernel.org/stable/c/0b31e28fbd773aefb6164687e0767319b8199829
- https://git.kernel.org/stable/c/7fb374981e31c193b1152ed8d3b0a95b671330d4
- https://git.kernel.org/stable/c/dd431c3ac1fc34a9268580dd59ad3e3c76b32a8c
- https://git.kernel.org/stable/c/a78a6f0da57d058e2009e9958fdcef66f165208c
- https://git.kernel.org/stable/c/be84f32bb2c981ca670922e047cdde1488b233de
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Sources
- CVE-2024-39494 · CVE Program
- CVE-2024-39494 · NVD
- FIRST EPSS
- GHSA-2938-5hf8-58m3 · GitHub Advisory Database · CC BY 4.0
- CVE-2024-39494 · Red Hat security data · CC BY 4.0
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