Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: qede: fix off-by-one in BD ring consumption on build_skb failure qede_rx_build_skb() and qede_tpa_rx_build_skb() do not check for a NULL return from qede_build_skb(). When it returns NULL under memory pressure, the functions still consume a BD from the ring before returning NULL. The callers then recycle additional BDs, resulting in one extra BD being consumed (off-by-one). This desynchronizes the BD ring, which can corrupt DMA page reference counts and lead to SLUB freelist corruption. Commit 4e910dbe3650 ("qede: confirm skb is allocated before using") added a NULL check inside qede_build_skb() to prevent a NULL pointer dereference, but did not address the missing NULL checks in the callers, making this off-by-one reachable. Fix this by adding NULL checks for the return value of qede_build_skb() in both qede_rx_build_skb() and qede_tpa_rx_build_skb(), returning NULL immediately before any BD ring manipulation.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 8a8633978b842c88fbcfe00d4e5dde96048f630e before ecc05d4b20220a09c9c69584fc46ca55248a374a; affected 8a8633978b842c88fbcfe00d4e5dde96048f630e before 07be8b8adf91b7ada4c3dacce064d572a6066421; affected 8a8633978b842c88fbcfe00d4e5dde96048f630e before 1624aa100c0b218181aa74e3696a389b509298cb; affected 8a8633978b842c88fbcfe00d4e5dde96048f630e before 0bf78df2d3ecb1f4964ff42a7327d25845955153; affected 8a8633978b842c88fbcfe00d4e5dde96048f630e before 814a5edac8c9fc04051808d5faaa93768e989281; affected 8a8633978b842c88fbcfe00d4e5dde96048f630e before b066420e57f3402a52c998678b4678252ac9bb63; affected 8a8633978b842c88fbcfe00d4e5dde96048f630e before 982d6d6bc059c5dff37a2201c2f08c14bcfcbd20; affected 8a8633978b842c88fbcfe00d4e5dde96048f630e before a0a558ca7e75b49e71f8c545c30e8c005e6e4e2f |
| Linux / Linux | affected 4.18; unaffected 0 before 4.18; unaffected 5.10.261 through 5.10.*; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.97 through 6.12.*; unaffected 6.18.40 through 6.18.*; unaffected 7.1.5 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/ecc05d4b20220a09c9c69584fc46ca55248a374a
- https://git.kernel.org/stable/c/07be8b8adf91b7ada4c3dacce064d572a6066421
- https://git.kernel.org/stable/c/1624aa100c0b218181aa74e3696a389b509298cb
- https://git.kernel.org/stable/c/0bf78df2d3ecb1f4964ff42a7327d25845955153
- https://git.kernel.org/stable/c/814a5edac8c9fc04051808d5faaa93768e989281
- https://git.kernel.org/stable/c/b066420e57f3402a52c998678b4678252ac9bb63
- https://git.kernel.org/stable/c/982d6d6bc059c5dff37a2201c2f08c14bcfcbd20
- https://git.kernel.org/stable/c/a0a558ca7e75b49e71f8c545c30e8c005e6e4e2f
ADP enrichment
No English description supplied.
No references supplied.