In the Linux kernel, the following vulnerability has been resolved:
wifi: mt76: mt7921: fix error code of return in mt7921_acpi_read
Kernel NULL pointer dereference when ACPI SAR table isn't implemented well.
Fix the error code of return to mark the ACPI SAR table as invalid.
[ 5.077128] mt7921e 0000:06:00.0: sar cnt = 0
[ 5.077381] BUG: kernel NULL pointer dereference, address:
0000000000000004
[ 5.077630] #PF: supervisor read access in kernel mode
[ 5.077883] #PF: error_code(0x0000) - not-present page
[ 5.078138] PGD 0 P4D 0
[ 5.078398] Oops: 0000 [#1] PREEMPT SMP NOPTI
[ 5.079202] RIP: 0010:mt7921_init_acpi_sar+0x106/0x220
[mt7921_common]
...
[ 5.080786] Call Trace:
[ 5.080786]
[ 5.080786] mt7921_register_device+0x37d/0x490 [mt7921_common]
[ 5.080786] mt7921_pci_probe.part.0+0x2ee/0x310 [mt7921e]
[ 5.080786] mt7921_pci_probe+0x52/0x70 [mt7921e]
[ 5.080786] local_pci_probe+0x47/0x90
[ 5.080786] pci_call_probe+0x55/0x190
[ 5.080786] pci_device_probe+0x84/0x120
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
- EG Severity
- Not assessed: no CVSS publishedA missing CVSS is not a severity of zero.
- EG Likelihood
- 0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-28). FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- No SSVC decision: EchelonGraph has not assessed this CVECISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the BOD 26-04 block below.
BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it