Answer in brief
CVE-2025-38710 records a High severity (CVSS 7.8) vulnerability in gfs2: Validate i_depth for exhash directories. 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.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=9a0045088d888c9c539c8c626a366cb52c0fbdab <076e992752e4b24178918f748d75597c80a408d2 || >=9a0045088d888c9c539c8c626a366cb52c0fbdab <366183911b153e9b8cf758e1414e1154d7569337 || >=9a0045088d888c9c539c8c626a366cb52c0fbdab <112bb60cd0e254a369e95aa9941a694ffeca089f || >=9a0045088d888c9c539c8c626a366cb52c0fbdab <cddea0c721106ea480371412d8de21705eb27376 || >=9a0045088d888c9c539c8c626a366cb52c0fbdab <53a0249d68a210c16e961b83adfa82f94ee0a53d || >=9a0045088d888c9c539c8c626a366cb52c0fbdab <b5f46951e62377b6e406fadc18bc3c5bdf1632a7 || >=9a0045088d888c9c539c8c626a366cb52c0fbdab <9680c58675b82348ab84d387e4fa727f7587e1a0 || >=9a0045088d888c9c539c8c626a366cb52c0fbdab <557c024ca7250bb65ae60f16c02074106c2f197b | 076e992752e4b24178918f748d75597c80a408d2, 366183911b153e9b8cf758e1414e1154d7569337, 112bb60cd0e254a369e95aa9941a694ffeca089f, cddea0c721106ea480371412d8de21705eb27376, 53a0249d68a210c16e961b83adfa82f94ee0a53d, b5f46951e62377b6e406fadc18bc3c5bdf1632a7, 9680c58675b82348ab84d387e4fa727f7587e1a0, 557c024ca7250bb65ae60f16c02074106c2f197b |
| Linux/Linuxgeneric | 2.6.26 | Not reported |
Published upstream
Sep 4, 2025
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: gfs2: Validate i_depth for exhash directories A fuzzer test introduced corruption that ends up with a depth of 0 in dir_e_read(), causing an undefined shift by 32 at: index = hash >> (32 - dip->i_depth); As calculated in an open-coded way in dir_make_exhash(), the minimum depth for an exhash directory is ilog2(sdp->sd_hash_ptrs) and 0 is invalid as sdp->sd_hash_ptrs is fixed as sdp->bsize / 16 at mount time. So we can avoid the undefined behaviour by checking for depth values lower than the minimum in gfs2_dinode_in(). Values greater than the maximum are already being checked for there. Also switch the calculation in dir_make_exhash() to use ilog2() to clarify how the depth is calculated. Tested with the syzkaller repro.c and xfstests '-g quick'.
Quoted source text, attributed separately from HOL analysis.