CVE-2024-26739
What it is
In the Linux kernel, the following vulnerability has been resolved: net/sched: act_mirred: don't override retval if we already lost the skb If we're redirecting the skb, and haven't called tcf_mirred_forward(), yet, we need to tell the core to drop the skb by setting the retcode to SHOT. If we have called tcf_mirred_forward(), however, the skb is out of our hands and returning SHOT will lead to UaF. Move the retval override to the error path which actually need it.
At a glance
- Exploitability
- Can be exploited locally on the machine with a low-privilege account. High risk of data exposure, data tampering, service disruption.
- Exploit odds
- 0.3% chance of exploitation in the next 30 days (EPSS).
- Fix
- A patch, advisory or fixed version is referenced. Upgrade or apply it.
Timeline
- PublishedDisclosed publicly on CVE.org and NVD
- Last updatedMost recent change to the record
Why it ranks here
- Exploited in the wild: no, CISA does not list it.
- Exploit odds: 0.3% in the next 30 days (EPSS).
- Severity: 7.8 HIGH (CVSS).
- Fix: a patch or advisory is linked.
Details
- Published
- Last modified
- Exploit probability
- 0.3% · EPSS, next 30 days
- Weakness
- CWE-416 · Use after free
- Record status
- Modified
Affected
- Debian Linux 11.0
- Linux Kernel < 5.10.238
- Linux Kernel < 5.15.182
- Linux Kernel < 6.1.136
- Linux Kernel < 6.6.19
- Linux Kernel < 6.7.7
- Linux Kernel 6.8
Attack profile CVSS 3.1 · 7.8
- Attack vector
- Local
- Complexity
- Low
- Privileges needed
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Raw vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Is it in your code?
Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.
Read https://cve-list.com/agent/cve/CVE-2024-26739.md and follow it. Check whether this project is affected by CVE-2024-26739. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.
Fix and advisories
- https://git.kernel.org/stable/c/0117fe0a4615a7c8d30d6ebcbf87332fbe63e6fd
- https://git.kernel.org/stable/c/166c2c8a6a4dc2e4ceba9e10cfe81c3e469e3210
- https://git.kernel.org/stable/c/28cdbbd38a4413b8eff53399b3f872fd4e80db9d
- https://git.kernel.org/stable/c/9d3ef89b6a5e9f2e940de2cef3d543be0be8dec5
- https://git.kernel.org/stable/c/e873e8f7d03a2ee5b77fb1a305c782fed98e2754
- https://git.kernel.org/stable/c/f4e294bbdca8ac8757db436fc82214f3882fc7e7
- https://git.kernel.org/stable/c/166c2c8a6a4dc2e4ceba9e10cfe81c3e469e3210
- https://git.kernel.org/stable/c/28cdbbd38a4413b8eff53399b3f872fd4e80db9d
- https://git.kernel.org/stable/c/f4e294bbdca8ac8757db436fc82214f3882fc7e7
References
- https://git.kernel.org/stable/c/0117fe0a4615a7c8d30d6ebcbf87332fbe63e6fd
- https://git.kernel.org/stable/c/166c2c8a6a4dc2e4ceba9e10cfe81c3e469e3210
- https://git.kernel.org/stable/c/28cdbbd38a4413b8eff53399b3f872fd4e80db9d
- https://git.kernel.org/stable/c/9d3ef89b6a5e9f2e940de2cef3d543be0be8dec5
- https://git.kernel.org/stable/c/e873e8f7d03a2ee5b77fb1a305c782fed98e2754
- https://git.kernel.org/stable/c/f4e294bbdca8ac8757db436fc82214f3882fc7e7
- https://git.kernel.org/stable/c/166c2c8a6a4dc2e4ceba9e10cfe81c3e469e3210
- https://git.kernel.org/stable/c/28cdbbd38a4413b8eff53399b3f872fd4e80db9d
- https://git.kernel.org/stable/c/f4e294bbdca8ac8757db436fc82214f3882fc7e7
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
- https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html