linux linux kernel 2.6.20.6 vulnerabilities and exploits

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Double free vulnerability in the xfrm6_tunnel_rcv function in net/ipv6/xfrm6_tunnel.c in the Linux kernel prior to 2.6.22, when the xfrm6_tunnel module is enabled, allows remote malicious users to cause a denial of service (panic) via crafted IPv6 packets.

The signal handling in the Linux kernel prior to 2.6.22, including 2.6.2, when running on PowerPC systems using HTX, allows local users to cause a denial of service via unspecified vectors involving floating point corruption and concurrency, related to clearing of MSR bits.

fs/nfs/client.c in the Linux kernel prior to 2.6.23 does not properly initialize a certain structure member that stores the maximum NFS filename length, which allows local users to cause a denial of service (OOPS) via a long filename, related to the encode_lookup function.

The sctp_rcv_ootb function in the SCTP implementation in the Linux kernel prior to 2.6.23 allows remote malicious users to cause a denial of service (infinite loop) via (1) an Out Of The Blue (OOTB) chunk or (2) a chunk of zero length.

Linux kernel prior to 2.6.25.2 does not apply a certain protection mechanism for fcntl functionality, which allows local users to (1) execute code in parallel or (2) exploit a race condition to obtain "re-ordered access to the descriptor table."

VFS in the Linux kernel prior to 2.6.22.16, and 2.6.23.x prior to 2.6.23.14, performs tests of access mode by using the flag variable instead of the acc_mode variable, which might allow local users to bypass intended permissions and remove directories.

1 Github repository

The (1) sys32_mremap function in arch/sparc64/kernel/sys_sparc32.c, the (2) sparc_mmap_check function in arch/sparc/kernel/sys_sparc.c, and the (3) sparc64_mmap_check function in arch/sparc64/kernel/sys_sparc.c, in the Linux kernel prior to 2.6.25.4, omit some virtual-address ran...

The pppol2tp_recvmsg function in drivers/net/pppol2tp.c in the Linux kernel 2.6 prior to 2.6.26-rc6 allows remote malicious users to cause a denial of service (kernel heap memory corruption and system crash) and possibly have unspecified other impact via a crafted PPPOL2TP packet...

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