CVE-2024-26739
net/sched: act_mirred: don't override retval if we already lost the skb
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/sched: act_mirred: no anula retval si ya perdimos el skb. Si estamos redirigiendo el skb y aún no hemos llamado a tcf_mirred_forward(), necesitamos para decirle al núcleo que suelte el skb configurando el código de retección en SHOT. Sin embargo, si hemos llamado a tcf_mirred_forward(), el skb está fuera de nuestras manos y devolver SHOT conducirá a UaF. Mueva la anulación de recuperación a la ruta de error que realmente la necesita.
A use-after-free flaw was found in net/sched/act_mirred.c in the Linux kernel. This may result in a crash.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-02-19 CVE Reserved
- 2024-04-03 CVE Published
- 2024-04-04 EPSS Updated
- 2024-12-19 CVE Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-416: Use After Free
CAPEC
References (6)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/e5cf1baf92cb785b90390db1c624948e70c8b8bd | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
|---|---|---|
| https://access.redhat.com/security/cve/CVE-2024-26739 | 2024-09-24 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=2273270 | 2024-09-24 |
Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.19 < 6.6.19 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.19 < 6.6.19" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.19 < 6.7.7 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.19 < 6.7.7" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.19 < 6.8 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.19 < 6.8" | en |
Affected
| ||||||