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Description

In the Linux kernel, the following vulnerability has been resolved: NFC: nci: uart: Set tty->disc_data only in success path Setting tty->disc_data before opening the NCI device means we need to clean it up on error paths. This also opens some short window if device starts sending data, even before NCIUARTSETDRIVER IOCTL succeeded (broken hardware?). Close the window by exposing tty->disc_data only on the success path, when opening of the NCI device and try_module_get() succeeds. The code differs in error path in one aspect: tty->disc_data won't be ever assigned thus NULL-ified. This however should not be relevant difference, because of "tty->disc_data=NULL" in nci_uart_tty_open().

PUBLISHED Reserved 2025-04-16 | Published 2025-07-25 | Updated 2025-11-03 | Assigner Linux

Product status

Default status
unaffected

9961127d4bce6325e9a0b0fb105e0c85a6c62cb7 (git) before a514fca2b8e95838a3ba600f31a18fa60b76d893
affected

9961127d4bce6325e9a0b0fb105e0c85a6c62cb7 (git) before 000bfbc6bc334a93fffca8f5aa9583e7b6356cb5
affected

9961127d4bce6325e9a0b0fb105e0c85a6c62cb7 (git) before ac6992f72bd8e22679c1e147ac214de6a7093c23
affected

9961127d4bce6325e9a0b0fb105e0c85a6c62cb7 (git) before dc7722619a9c307e9938d735cf4a2210d3d48dcb
affected

9961127d4bce6325e9a0b0fb105e0c85a6c62cb7 (git) before a8acc7080ad55c5402a1b818b3008998247dda87
affected

9961127d4bce6325e9a0b0fb105e0c85a6c62cb7 (git) before 55c3dbd8389636161090a2b2b6d2d709b9602e9c
affected

9961127d4bce6325e9a0b0fb105e0c85a6c62cb7 (git) before e9799db771b2d574d5bf0dfb3177485e5f40d4d6
affected

9961127d4bce6325e9a0b0fb105e0c85a6c62cb7 (git) before fc27ab48904ceb7e4792f0c400f1ef175edf16fe
affected

Default status
affected

4.2
affected

Any version before 4.2
unaffected

5.4.295 (semver)
unaffected

5.10.239 (semver)
unaffected

5.15.186 (semver)
unaffected

6.1.142 (semver)
unaffected

6.6.95 (semver)
unaffected

6.12.35 (semver)
unaffected

6.15.4 (semver)
unaffected

6.16 (original_commit_for_fix)
unaffected

References

lists.debian.org/debian-lts-announce/2025/10/msg00008.html

lists.debian.org/debian-lts-announce/2025/10/msg00007.html

git.kernel.org/...c/a514fca2b8e95838a3ba600f31a18fa60b76d893

git.kernel.org/...c/000bfbc6bc334a93fffca8f5aa9583e7b6356cb5

git.kernel.org/...c/ac6992f72bd8e22679c1e147ac214de6a7093c23

git.kernel.org/...c/dc7722619a9c307e9938d735cf4a2210d3d48dcb

git.kernel.org/...c/a8acc7080ad55c5402a1b818b3008998247dda87

git.kernel.org/...c/55c3dbd8389636161090a2b2b6d2d709b9602e9c

git.kernel.org/...c/e9799db771b2d574d5bf0dfb3177485e5f40d4d6

git.kernel.org/...c/fc27ab48904ceb7e4792f0c400f1ef175edf16fe

cve.org (CVE-2025-38416)

nvd.nist.gov (CVE-2025-38416)

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