CVE-2026-89498
2026-09-11
20h19 +00:00
20h19 +00:00
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Mô tả CVE
In the Linux kernel, the following vulnerability has been resolved:
orangefs: fix double-free of trailer_buf on readdir copy failure
On a readdir downcall, orangefs_devreq_write_iter() frees
op->downcall.trailer_buf with vfree() when copy_from_iter_full() fails,
but does not clear the pointer before goto Efault. The waiter in
do_readdir() is then woken with a negative status and frees the same
pointer again on its r < 0 path, causing a deterministic double-free.
A client holding /dev/pvfs2-req triggers it by sending a readdir
downcall whose declared trailer_size exceeds the bytes it supplies.
Clear the pointer after freeing so the readdir-side vfree() becomes a
no-op.
