cve-2026-46331-audit

cve-2026-46331-audit CVE-2026-46331일명 pedit COW에 대한 읽기 전용 감사 스크립트입니다. 이는 Linux 커널의 net/sched actpedit 동작에서 발생하는 부분적 COW쓰기 시 복사 버그로, 로컬의 권한이 없는 사용자가 페이지 캐시 메모리를 손상시키고 루트로 권한을 상승시킬 수 있습니다. root@kitploit: | | | \ | | / / \ \ / / | | | | | | | | | | | | | | | | \ \ /\ / / | /| || || | | | | | || || |...

CVE-2026-68138

CVE-2026-68138 — Linux kernel net/sched qdisc rate-table UAF tracking site Source for the CVE-2026-68138 patch-status tracker: a single-page site recording which distributions have shipped a fix for the net/sched qdisc rate-table use-after-free / double-free in the Linux kernel. Where the facts...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: sched: schcake: bounds checks were added to the host bulk flow fairness counts. Although we fixed a logic error in the commit cited below, the syzbot still managed to cause an underflow in the per-host bulk flow counters, resulti...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: net/sched: taprio: avoid disabling offload when it was never enabled In a rather strange API design decision, qdisc-destroy is called even if qdisc-init never succeeded. This isn’t exclusive to the commit 87b60cfacf9f “netsched:...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: netsched: clsflow: validate TCAFLOWRSHIFT attribute The syzbot found that the TCAFLOWRSHIFT attribute was not validated. Shifting a 32-bit integer is undefined for large shift values. UBSAN: Shift-out-of-bounds in...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: net/sched: clsu32: use skbheaderpointercareful skbheaderpointer does not fully validate negative @offset values. Use skbheaderpointercareful instead. GangMin Kim provided a report and a reproduction example for u32classify: Bug:...

Astra Linux – Vulnerability found in Linux 5.10, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: sched/fair: Do not balance tasks to their current running CPUs. We encountered a situation where the balancer attempts to balance a migrated task with the balance feature disabled, thereby triggering a warning in settaskcpu. The...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: netsched: schsfq: rejecting invalid perturb periods. Gerrard Tai reported that the perturbperiod of SFQ does not have a range check yet, and this could be exploited to trigger a race condition, which has been fixed in a separa...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: net/sched: Returns NULL when htblookupleaf encounters an empty rbtree. htblookupleaf has a BUG that can be triggered with the following commands: tc qdisc del dev lo root tc qdisc add dev lo root handle 1: htb default 1 tc class...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: net/sched: actskbedit: fix divide-by-zero in tcfskbedithash Commit 38a6f0865796 “net: sched: support hash selecting tx queue” added support for SKBEDITFTXQSKBHASH. The inclusive range size is computed as follows: mappingmod =...

Astra Linux – Vulnerabilities in Linux 5.10, Linux 5.15, Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: net/sched: accept TCASTAB only for root qdisc Most qdiscs maintain their backlog using qdiscpktlenskb on the assumption it is invariant between the enqueue and dequeue handlers. Unfortunately syzbot can crash a host rather easily...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerabilities have been resolved: net/sched: taprio: improper checking of the TCATAPRIOTCENTRYINDEX attribute The taprioparsetcentry function does not correctly check the TCATAPRIOTCENTRYINDEX attribute: int tc; // Signed value tc =...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, Linux, Linux 5.15

In the Linux kernel, the following vulnerabilities have been resolved: net/sched: actskbmod: prevent kernel-infoleak The syzbot discovered that tcfskbmoddump was copying four bytes from the kernel stack to user space 1. The issue here is that ‘struct tcskbmod’ has a four-byte hole. We need to cle...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerabilities have been resolved: MIPS: smp: fill in sibling and core maps earlier After enabling CONFIGSCHEDCORE landed during 5.14 cycle, 2-core 2-thread-per-core interAptiv CPS-driven started emitting the following messages: 0.025698 CPU1 revision is:...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: net/sched: ets: Always remove the class from the active list before deleting it in etsqdiscchange. The vulnerability is a race condition between etsqdiscdequeue and etsqdiscchange. This causes a Use-After-Freeze UAF error on the...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, and Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: net/sched: fqpie: avoid stalls in fqpietimer When setting a high number of flows limit being 65536, fqpietimer is currently using too much time as syzbot reported. Add logic to yield the cpu every 2048 flows less than 150 usec on...

Astra Linux – Vulnerability in Linux 6.1

In the Linux kernel, the following vulnerability has been resolved: sched/smt: Fixed the imbalance in schedsmtpresent. I received the following warning during the stress test: jump label: negative count! WARNING: CPU: 3, PID: 38, at kernel/jumplabel.c:263, statickeyslowtrydec+0x9d/0xb0 Call Trace...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: net/sched: schets: do not peek at classes beyond ‘nbands’ When the number of DRR classes decreases, the round-robin active list may contain elements that have already been freed in etsqdiscchange. As a result, it’s possible to...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: netsched: Fixed a NULL dereference in fifosetlimit. syzbot reported another NULL dereference in fifosetlimit. 1 I can reproduce the issue with the following commands: unshare -n tc qd add dev lo root handle 1:0 tbf limit 20000...

Astra Linux – Vulnerability found in Linux 5.10, Linux 6.1, Linux, Linux 5.15

In the Linux kernel, the following vulnerability has been resolved: net/sched: actapi: use RCU with deferred freeing for action lifecycle When NEWTFILTER and DELFILTER are run concurrently, a race condition may occur, potentially leading to errors. Let’s illustrate this with an example where CPU0...