SB2023091130 - Debian update for linux
Published: September 11, 2023 Updated: January 4, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 26 secuirty vulnerabilities.
1) Resource exhaustion (CVE-ID: CVE-2023-1206)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a hash collision flaw in the IPv6 connection lookup table in the Linux kernel’s IPv6 functionality when an attacker makes a new kind of SYN flood attack. A remote attacker can increase the CPU usage of the server that accepts IPV6 connections up to 95%.
2) Use-after-free (CVE-ID: CVE-2023-1989)
The vulnerability allows a local user to escalate privileges on the system.
The
vulnerability exists due to a use-after-free error within the btsdio_remove() function in driversluetoothtsdio.c. A local user can trigger a
use-after-free error and escalate privileges on the system.
3) Division by zero (CVE-ID: CVE-2023-20588)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to a divide by zero error that can return speculative data. A local user can gain access to potentially sensitive information.
4) Improper locking (CVE-ID: CVE-2023-2430)
The vulnerability allows a local user to perform a denial of service attack (DoS).
The vulnerability exists due to improper locking within the io_uring subsystem in Linux kernel when IOPOLL mode is being
used. A local user can crash the kernel.
5) NULL pointer dereference (CVE-ID: CVE-2023-2898)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error within the f2fs_write_end_io() function in fs/f2fs/data.c. A local user can pass specially crafted data to the system and perform a denial of service (DoS) attack.
6) Buffer overflow (CVE-ID: CVE-2023-34319)
The vulnerability allows a malicious guest to perform a denial of service (DoS) attack.
The vulnerability exists due to a boundary error in netback when processing certain packets. A malicious guest can send specially crafted packets to the backend, trigger memory corruption and crash the hypervisor.
7) Out-of-bounds write (CVE-ID: CVE-2023-3611)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in the qfq_change_agg() function in net/sched/sch_qfq.c within the Linux kernel net/sched: sch_qfq component. A local user trigger an out-of-bounds write and execute arbitrary code on the target system.
8) NULL pointer dereference (CVE-ID: CVE-2023-3772)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error within the xfrm_update_ae_params() function in the IP framework for transforming packets (XFRM subsystem). A local user with CAP_NET_ADMIN privileges can perform a denial of service (DoS) attack.
9) Out-of-bounds read (CVE-ID: CVE-2023-3773)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to a boundary condition in IP framework for transforming packets (XFRM subsystem). A local user with CAP_NET_ADMIN privileges can cause a 4 byte out-of-bounds read of XFRMA_MTIMER_THRESH when parsing netlink attributes and gain access to sensitive information.
10) Use-after-free (CVE-ID: CVE-2023-3776)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the the Linux kernel's net/sched: cls_fw component. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.
11) Resource management error (CVE-ID: CVE-2023-3777)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to improper handling of table rules flush in certain circumstances within the netfilter subsystem in net/netfilter/nf_tables_api.c. A local user can perform a denial of service (DoS) attack or execute arbitrary code with elevated privileges.
12) Use-after-free (CVE-ID: CVE-2023-3863)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the nfc_llcp_find_local() function in net/nfc/llcp_core.c in NFC implementation in Linux kernel. A local user can execute arbitrary code with elevated privileges.
13) Use-after-free (CVE-ID: CVE-2023-4004)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error in the way a user triggers the nft_pipapo_remove function with the element, without a NFT_SET_EXT_KEY_END. A local user can execute arbitrary code with elevated privileges.
14) Buffer overflow (CVE-ID: CVE-2023-4015)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error within the netfilter subsystem in net/netfilter/nft_immediate.c when handling bound chain deactivation. A local user can trigger memory corruption and execute arbitrary code with elevated privileges.
15) Use-after-free (CVE-ID: CVE-2023-40283)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the l2cap_sock_release() function in net/bluetooth/l2cap_sock.c. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.
16) Use-after-free (CVE-ID: CVE-2023-4128)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within net/sched/cls_fw.c in classifiers (cls_fw, cls_u32, and cls_route) in the Linux Kernel. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.
17) Use-after-free (CVE-ID: CVE-2023-4132)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a use-after-free error within the siano smsusb module in the Linux kernel. A local user can trigger a use-after-free error and crash the kernel.
18) Use-after-free (CVE-ID: CVE-2023-4147)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error in Netfilter functionality when adding a rule with NFTA_RULE_CHAIN_ID. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.
19) Race condition (CVE-ID: CVE-2023-4155)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a race condition in KVM AMD Secure Encrypted Virtualization (SEV) in Linux kernel. A local user can exploit the race and escalate privileges on the system.
20) Type Confusion (CVE-ID: CVE-2023-4194)
The vulnerability allows a local user to bypass implemented security restrictions.
The vulnerability exists due to a type confusion error in TUN/TAP functionality. A local user can bypass network filters and gain unauthorized access to some resources.
The vulnerability exists due to incomplete fix for #VU72742 (CVE-2023-1076).
21) Use-after-free (CVE-ID: CVE-2023-4206)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the the cls_route component in Linux kernel packet scheduler. A local user can trigger a use-after-free error and execute arbitrary code on the system.
22) Use-after-free (CVE-ID: CVE-2023-4207)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the the cls_fw component in Linux kernel packet scheduler. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.
23) Use-after-free (CVE-ID: CVE-2023-4208)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the the cls_u32 component in Linux kernel packet scheduler. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.
24) Stack-based buffer overflow (CVE-ID: CVE-2023-4273)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary error in the implementation of the file name reconstruction function in the exFAT driver in Linux kernel. A local user can trigger a stack overflow and execute arbitrary code with elevated privileges.
25) Memory leak (CVE-ID: CVE-2023-4569)
The vulnerability allows a local user to perform DoS attack on the target system.
The vulnerability exists due memory leak within the nft_set_catchall_flush() function in net/netfilter/nf_tables_api.c. A local user can perform a denial of service attack.
26) Use-after-free (CVE-ID: CVE-2023-4622)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the unix_stream_sendpage() function in af_unix component. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.
Remediation
Install update from vendor's website.