CVE-2023-52462
bpf: fix check for attempt to corrupt spilled pointer
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
In the Linux kernel, the following vulnerability has been resolved: bpf: fix check for attempt to corrupt spilled pointer When register is spilled onto a stack as a 1/2/4-byte register, we set
slot_type[BPF_REG_SIZE - 1] (plus potentially few more below it,
depending on actual spill size). So to check if some stack slot has
spilled register we need to consult slot_type[7], not slot_type[0]. To avoid the need to remember and double-check this in the future, just
use is_spilled_reg() helper.
En el kernel de Linux, se resolvió la siguiente vulnerabilidad: bpf: revisión de corrección para intentar dañar el puntero derramado Cuando el registro se derrama en una pila como un registro de 1/2/4 bytes, configuramos slot_type[BPF_REG_SIZE - 1] (más potencialmente algunos más debajo de él, dependiendo del tamaño real del derrame). Entonces, para verificar si alguna ranura de la pila se ha desbordado, debemos consultar slot_type[7], no slot_type[0]. Para evitar la necesidad de recordar y volver a verificar esto en el futuro, simplemente use el asistente is_spilled_reg().
A flaw was found in the Linux kernel. When the register is spilled onto a stack as a 1/2/4-byte register, the slot_type[BPF_REG_SIZE - 1] is set, possibly including a few more below it, depending on the actual spill size. To confirm if some stack slots have a spilled register, consult slot_type[7], not slot_type[0]. To avoid the need to remember and double-check this in the future, use the is_spilled_reg() helper.
In the Linux kernel, the following vulnerability has been resolved: bpf: fix check for attempt to corrupt spilled pointer When register is spilled onto a stack as a 1/2/4-byte register, we set slot_type[BPF_REG_SIZE - 1] (plus potentially few more below it, depending on actual spill size). So to check if some stack slot has spilled register we need to consult slot_type[7], not slot_type[0]. To avoid the need to remember and double-check this in the future, just use is_spilled_reg() helper.
Alon Zahavi discovered that the NVMe-oF/TCP subsystem in the Linux kernel did not properly validate H2C PDU data, leading to a null pointer dereference vulnerability. A remote attacker could use this to cause a denial of service. Sander Wiebing, Alvise de Faveri Tron, Herbert Bos, and Cristiano Giuffrida discovered that the Linux kernel mitigations for the initial Branch History Injection vulnerability were insufficient for Intel processors. A local attacker could potentially use this to expose sensitive information.
CVSS Scores
SSVC
- Decision:Track
Timeline
- 2024-02-20 CVE Reserved
- 2024-02-23 CVE Published
- 2025-05-04 CVE Updated
- 2025-06-28 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
- CWE-476: NULL Pointer Dereference
CAPEC
References (12)
URL | Date | SRC |
---|
URL | Date | SRC |
---|---|---|
https://access.redhat.com/security/cve/CVE-2023-52462 | 2024-11-12 | |
https://bugzilla.redhat.com/show_bug.cgi?id=2265798 | 2024-11-12 |
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" | >= 5.10.163 < 5.10.209 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.10.163 < 5.10.209" | en |
Affected
| ||||||
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.15.86 < 5.15.148 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.15.86 < 5.15.148" | en |
Affected
| ||||||
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.16 < 6.1.75 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.16 < 6.1.75" | en |
Affected
| ||||||
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.16 < 6.6.14 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.16 < 6.6.14" | en |
Affected
| ||||||
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.16 < 6.7.2 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.16 < 6.7.2" | en |
Affected
| ||||||
Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 5.16 < 6.8 Search vendor "Linux" for product "Linux Kernel" and version " >= 5.16 < 6.8" | en |
Affected
|