net: stmmac: clear stale buf->page after recycling on skb build failure
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.18.55, 7.2.9
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
In the Linux kernel, the following vulnerability has been resolved: net: stmmac: clear stale buf->page after recycling on skb build failure In stmmac_rx(), when napi_build_skb() fails the descriptor page is recycled back to the page pool with page_pool_recycle_direct(), but buf->page is left pointing at the recycled page, unlike every other consumption site in the function which clears the pointer after handing the page away. With the stale pointer stmmac_rx_refill() skips the replacement allocation and programs the already-recycled page back into the RX descriptor. Clear buf->page on the napi_build_skb() failure path to keep the buffer lifecycle consistent with the other consumption sites.
Timeline
- CVE published
- Record last updated
Affected versions
- Linux Linux
From df542f669307918f054a17878ff6dd1ddbb2fe18 · fixed in 501baaeca7d128fa0a2f6953cf5873c5b0d7cf89; From df542f669307918f054a17878ff6dd1ddbb2fe18 · fixed in 298673397ea3f6f5811b84f0d9f71eac71dda2e3; From df542f669307918f054a17878ff6dd1ddbb2fe18 · fixed in 0a7822e34a0bfde31b194ac3da3253e5032b44cc
- Linux Linux
6.14
- KernelLinux
From 6.14.0 · fixed in 6.18.55; From 6.19.0 · fixed in 7.2.9