7.8

CVE-2024-26739

net/sched: act_mirred: don't override retval if we already lost the skb

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Debian ≫ Debian Linux Version11.0
Linux ≫ Linux Kernel Version >= 4.19 < 5.10.238
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.182
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.136
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.19
Linux ≫ Linux Kernel Version >= 6.7 < 6.7.7
Linux ≫ Linux Kernel Version6.8 Updaterc1
Linux ≫ Linux Kernel Version6.8 Updaterc2
Linux ≫ Linux Kernel Version6.8 Updaterc3
Linux ≫ Linux Kernel Version6.8 Updaterc4
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.28% 0.191
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://git.kernel.org/stable/c/166c2c8a6a4dc2e4ceba9e10cfe81c3e469e3210
Patch
https://git.kernel.org/stable/c/28cdbbd38a4413b8eff53399b3f872fd4e80db9d
Patch
https://git.kernel.org/stable/c/f4e294bbdca8ac8757db436fc82214f3882fc7e7
Patch
https://git.kernel.org/stable/c/e873e8f7d03a2ee5b77fb1a305c782fed98e2754
Patch
https://git.kernel.org/stable/c/9d3ef89b6a5e9f2e940de2cef3d543be0be8dec5
Patch
https://git.kernel.org/stable/c/0117fe0a4615a7c8d30d6ebcbf87332fbe63e6fd
Patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
Third Party Advisory
Mailing List
https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
Third Party Advisory
Mailing List