Answer in brief
CVE-2026-31675 records a High severity (CVSS 7.8) vulnerability in net/sched: sch_netem: fix out-of-bounds access in packet corruption. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=c865e5d99e25a171e8262fc0f7ba608568633c64 <a14b56863348686dd0387eea8ce66b85cf455908 || >=c865e5d99e25a171e8262fc0f7ba608568633c64 <13a66ca1e235d4bcd53d12d4c68490cad7f8e46f || >=c865e5d99e25a171e8262fc0f7ba608568633c64 <3a2999704ac36cfb4041fed3652d26a3373e8d12 || >=c865e5d99e25a171e8262fc0f7ba608568633c64 <4fd258e281fa8bc15e9ce2c7691941537e9258ad || >=c865e5d99e25a171e8262fc0f7ba608568633c64 <d64cb81dcbd54927515a7f65e5e24affdc73c14b | a14b56863348686dd0387eea8ce66b85cf455908, 13a66ca1e235d4bcd53d12d4c68490cad7f8e46f, 3a2999704ac36cfb4041fed3652d26a3373e8d12, 4fd258e281fa8bc15e9ce2c7691941537e9258ad, d64cb81dcbd54927515a7f65e5e24affdc73c14b |
| Linux/Linuxgeneric | 2.6.16 | Not reported |
Published upstream
Apr 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 16, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 16, 2026
In the Linux kernel, the following vulnerability has been resolved: net/sched: sch_netem: fix out-of-bounds access in packet corruption In netem_enqueue(), the packet corruption logic uses get_random_u32_below(skb_headlen(skb)) to select an index for modifying skb->data. When an AF_PACKET TX_RING sends fully non-linear packets over an IPIP tunnel, skb_headlen(skb) evaluates to 0. Passing 0 to get_random_u32_below() takes the variable-ceil slow path which returns an unconstrained 32-bit random integer. Using this unconstrained value as an offset into skb->data results in an out-of-bounds memory access. Fix this by verifying skb_headlen(skb) is non-zero before attempting to corrupt the linear data area. Fully non-linear packets will silently bypass the corruption logic.
Quoted source text, attributed separately from HOL analysis.