CVE-2026-53082In the Linux kernel, the following vulnerability has been resolved: net: hamradio: 6pack: fix uninit-value in sixpack_receive_buf sixpack_receive_buf() does not properly skip bytes with TTY error fla…
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In the Linux kernel, the following vulnerability has been resolved: net: hamradio: 6pack: fix uninit-value in sixpack_receive_buf sixpack_receive_buf() does not properly skip bytes with TTY error flags. The while loop iterates through the flags buffer but never advances the data pointer (cp), and passes the original count (including error bytes) to sixpack_decode(). This causes sixpack_decode() to process bytes that should have been skipped due to TTY errors. The TTY layer does not guarantee that cp[i] holds a meaningful value when fp[i] is set, so passing those positions to sixpack_decode() results in KMSAN reporting an uninit-value read. Fix this by processing bytes one at a time, advancing cp on each iteration, and only passing valid (non-error) bytes to sixpack_decode(). This matches the pattern used by slip_receive_buf() and mkiss_receive_buf() for the same purpose.
- CVSS
- 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-908
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Jul 23, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
linux linux_kernel linux:linux_kernel | from 2.6.12.1 before 5.10.258; from 5.11 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.141; from 6.7 before 6.12.91; from 6.13 before 6.18.33; from 6.19 before 7.0.10; 2.6.12; and 4 more ranges | NVD |
References
- https://git.kernel.org/stable/c/1d3abf0c3ddeefc6f6d913aa129acc06fce8240apatch
- https://git.kernel.org/stable/c/2951656b0de00153f2687f3a093890bce72b6215patch
- https://git.kernel.org/stable/c/578f3aba427c938fecfa0d8c83d9acb213a9b24apatch
- https://git.kernel.org/stable/c/987af7625ceb1ee59d70eb0abd7af11c75e45d79patch
- https://git.kernel.org/stable/c/bf9a38803b2626b01cc769aaf13485d8650f576fpatch
- https://git.kernel.org/stable/c/d4cceb5184538613572fb79319453f281b1eeacbpatch
- https://git.kernel.org/stable/c/d9ce2a4b679122397d7f35bad7be46913ad1ca80patch
- https://git.kernel.org/stable/c/e9cf4018d74237d142cd66243c821d13593270f0patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.