mm,hugetlb: take hugetlb_lock before decrementing h->resv_huge_pages
3Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackepss 0.1%
exploitation probability
0.1%top 96% of all CVEs
observed exploitation
nono source reports it
In the Linux kernel, the following vulnerability has been resolved:
mm,hugetlb: take hugetlb_lock before decrementing h->resv_huge_pages
The h->*_huge_pages counters are protected by the hugetlb_lock, but
alloc_huge_page has a corner case where it can decrement the counter
outside of the lock.
This could lead to a corrupted value of h->resv_huge_pages, which we have
observed on our systems.
Take the hugetlb_lock before decrementing h->resv_huge_pages to avoid a
potential race.
Affected products
Linux · LinuxReferences
https://git.kernel.org/stable/c/112a005d1ded04a4b41b6d01833cc0bda90625cchttps://git.kernel.org/stable/c/11993652d0b49e27272db0a37aa828d8a3a4b92bhttps://git.kernel.org/stable/c/12df140f0bdfae5dcfc81800970dd7f6f632e00chttps://git.kernel.org/stable/c/2b35432d324898ec41beb27031d2a1a864a4d40ehttps://git.kernel.org/stable/c/3e50a07b6a5fcd39df1534d3fdaca4292a65efe6https://git.kernel.org/stable/c/568e3812b1778b4c0c229649b59977d88f400ecehttps://git.kernel.org/stable/c/629c986e19fe9481227c7cdfd9a105bbc104d245https://git.kernel.org/stable/c/c828fab903725279aa9dc6ae3d44bb7e4778f92c