Linux kernel OOB read in accel/qaic resp_worker()
CVE-2026-98155 Published on September 25, 2026
accel/qaic: Address potential out-of-bounds read in resp_worker()
In the Linux kernel, the following vulnerability has been resolved:
accel/qaic: Address potential out-of-bounds read in resp_worker()
Although 'commit 2feec5ae5df7 ("accel/qaic: Handle DBC deactivation if the
owner went away")' fixes the scenario it was intended for by walking the
message and only decoding QAIC_TRANS_DEACTIVATE_FROM_DEV, if present, it
skipped over the bounds checking code that is included in decode_message().
This could lead to issues such as reading past the slab allocation's end,
infinite loops or kernel panics. For those issues to happen, a malformed
wire message is needed to be sent from the device.
Instead of duplicating the bounds checking code already present in
decode_message(), use the function inside resp_worker().
Products Associated with CVE-2026-98155
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Affected Versions
Linux:- Version 08021f2d4a557d6491e3bcc288e96425f50aa3cf and below f4b64488f3deca63f7fbc7d7c3835b2e668003f9 is affected.
- Version f403094d9075d7c565a3d81002b781c325cb3c07 and below 12deeade460d47031267256ba07add51cc7eabd0 is affected.
- Version 2feec5ae5df785658924ab6bd91280dc3926507c and below c72e81ee46bdd4c221114d6e9515e9b4647616d7 is affected.
- Version 2feec5ae5df785658924ab6bd91280dc3926507c and below ab243f74ab4084ca5c8dec608cb5b0deb27db067 is affected.
- Version 2dd67966f39a2abf8ccb4865031c722e40e01b7f is affected.
- Version ee0180e77e6c8482644569632065411de844c515 is affected.
- Version 6.12.81 and below 6.12.111 is affected.
- Version 6.18.22 and below 6.18.53 is affected.
- Version 6.6.134 and below 6.7 is affected.
- Version 6.19.12 and below 6.20 is affected.
- Version 7.0 is affected.
- Before 7.0 is unaffected.
- Version 6.12.111, <= 6.12.* is unaffected.
- Version 6.18.53, <= 6.18.* is unaffected.
- Version 7.2.7, <= 7.2.* is unaffected.
- Version 7.3-rc2, <= * is unaffected.