Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Fixed repeated calls to sockput when msg has moredata In the tcpbpfsendverdict redirection, the eval variable is assigned to SKREDIRECT after the applybytes data is sent. If msg has moredata, sockput will be called...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: powerpc64/bpf: The instruction “ldbrx” is limited to processors that comply with ISA v2.06. Johan reported the following crash with the testbpf function on the ppc64 e5500 architecture: testbpf: 296 ALUENDFROMLE 64:...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: libbpf: Use of the OPTSSET macro in bpfxdpquery When the featureFlags and xdpzcmaxsegs fields were added to the libbpf bpfxdpQueryOpts structure, the code that wrote these fields did not use the OPTSSET macro. This causes libbpf ...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: bpf: Fixed kernel address leakage in atomic fetch The change in commit 37086bfdc737 “bpf: Propagates stack bounds to registers in atomic operations with BPFFETCH” regarding the handling of checkmemaccess is flawed. This flaw allo...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: BPF: Zeroing allocated objects from slabs in the BPF memory allocator Currently, the freed elements in the BPF memory allocator may be reused immediately. For the htab map, reusing these elements will reinitialize special fields ...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: bpf, verifier: Fixed a memory leak in array reallocation for stack state. If an error NULL is returned by krealloc, callers of reallocarray would set their allocation pointers to NULL. However, when an error occurs in krealloc, i...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: BPF: bpfskstorage: Fixed invalid wait context lockdep report "The ./testprogs -t testlocalstorage" command reported a splat error: 27.137569 ============================= 27.138122 BUG: Invalid wait context 27.138650...

Astra Linux – Vulnerability in Linux 5.10, Linux

In the Linux kernel, the following vulnerabilities have been resolved: bpf, sockmap: Fixed issues where data was not being charged when msg-sg.size contained more data. In tcpbpfsendverdict: If msg-sg.size contains more data after tcpbpfsendmsgredir: c tcpbpfsendverdict tosend = msg-sg.size...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: BPF: Resetting the register ID for BPFEND value tracking When a register undergoes a BPFEND operation byte swap, its scalar value is mutated in-place. If this register previously shared a scalar ID with another register e.g., aft...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: bpf: Support deferring bpflink deallocation to after RCU grace period For some program types, the “bpflink” is passed as a “context” that can be used by those BPF programs to retrieve additional information. For example, for...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: vsock/bpf: Return early if the transport is not assigned. Some of the core functions can only be called if the transport has been assigned. As Michal reported, a socket may have NULL as the transport value, for example after a...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: BPF: Fixed kernel address leakage in atomic cmpxchg operations with R0 as an auxiliary register. The implementation of BPFCMPXCHG at a high level has the following parameters: .-old-val .-new-val BPFR0 = cmpxchg32,64DSTREG +...

Astra Linux – Vulnerability in Linux, Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: BPF: Added an oversize check before calling kvcalloc Commit 7661809d493b “mm: does not allow oversized kvmalloc calls” added the oversize check. When the allocation is larger than what kmalloc can handle, the following warning is...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: s390/bpf: Fixed pointer arithmetic in bpfplt. Kui-Feng Lee reported a crash on the s390x architecture, triggered by the dummystops/dummyinitptrarg test 1: 0x2 bpfstructopstestrun+0x156/0x250 sysbpf+0xa1a/0xd00...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: In the bpf code, there is a fix for a use-after-free of sk-sksocket in skpsockverdictdataready. The syzbot reported a use-after-free of the sk-sksocket of an AFUNIX socket in skpsockverdictdataready. 0 In the unixstreamsendmsg...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: bpf: Fixed an sdiv overflow issue Zac Ecob reported a problem where a bpf program might cause a kernel crash due to the following error: Oops: Divide error: 0000 1 PREEMPT SMP KASAN PTI The failure is caused by the following sign...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerabilities have been resolved: bpf: Fixed reference state management for synchronous callbacks Currently, the verifier verifies callback functions both synchronous and asynchronous as if they would be executed only once. The next instruction to be explored ...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: bpf: Fixed a panic that occurred due to an incorrect pageattr of im-image. In the scenario where livepatch and kretfunc coexist, the pageattr of im-image becomes rox after archpreparebpftrampoline in bpftrampolineupdate. Then, wh...

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

In the Linux kernel, the following vulnerability has been resolved: bpf: Detecting IP == ksym.end as part of the BPF program Now, since bpfthrow is the first call instruction with noreturn semantics within the verifier, this also leads to the elimination of dead code in unprecedented ways. For...

Astra Linux – Vulnerability in Linux 5.10

In the Linux kernel, the following vulnerability has been resolved: xdp, net: Fixed a use-after-free in bpfxdplinkrelease. The issue occurs between devgetbyindex and devxdpattachlink. At this point, devxdpuninstall is called. As a result, the xdp link will not be automatically detached when the...