CVSS: -EPSS: 0%CPEs: 5EXPL: 0CVE-2024-49998 – net: dsa: improve shutdown sequence
https://notcve.org/view.php?id=CVE-2024-49998
In the Linux kernel, the following vulnerability has been resolved: net: dsa: improve shutdown sequence Alexander Sverdlin presents 2 problems during shutdown with the lan9303 driver. One is specific to lan9303 and the other just happens to reproduce there. The first problem is that lan9303 is unique among DSA drivers in that it calls dev_get_drvdata() at "arbitrary runtime" (not probe, not shutdown, not remove): phy_state_machine() -> ... -> dsa_user_phy_read() -> ds->ops->phy_read() -> lan9303_phy_read() -> chip->ops->phy_read() -> lan9303_mdio_phy_read() -> dev_get_drvdata() But we never stop the phy_state_machine(), so it may continue to run after dsa_switch_shutdown(). Our common pattern in all DSA drivers is to set drvdata to NULL to suppress the remove() method that may come afterwards. But in this case it will result in an NPD. The second problem is that the way in which we set dp->conduit->dsa_ptr = NULL; is concurrent with receive packet processing. dsa_switch_rcv() checks once whether dev->dsa_ptr is NULL, but afterwards, rather than continuing to use that non-NULL value, dev->dsa_ptr is dereferenced again and again without NULL checks: dsa_conduit_find_user() and many other places. In between dereferences, there is no locking to ensure that what was valid once continues to be valid. Both problems have the common aspect that closing the conduit interface solves them. In the first case, dev_close(conduit) triggers the NETDEV_GOING_DOWN event in dsa_user_netdevice_event() which closes user ports as well. dsa_port_disable_rt() calls phylink_stop(), which synchronously stops the phylink state machine, and ds->ops->phy_read() will thus no longer call into the driver after this point. In the second case, dev_close(conduit) should do this, as per Documentation/networking/driver.rst: | Quiescence | ---------- | | After the ndo_stop routine has been called, the hardware must | not receive or transmit any data. • https://git.kernel.org/stable/c/ee534378f00561207656663d93907583958339ae https://git.kernel.org/stable/c/ff45899e732e57088985e3a497b1d9100571c0f5 https://git.kernel.org/stable/c/89b60402d43cdab4387dbbf24afebda5cf092ae7 https://git.kernel.org/stable/c/ab5d3420a1120950703dbdc33698b28a6ebc3d23 https://git.kernel.org/stable/c/b4a65d479213fe84ecb14e328271251eebe69492 https://git.kernel.org/stable/c/6c24a03a61a245fe34d47582898331fa034b6ccd •
CVSS: -EPSS: 0%CPEs: 7EXPL: 0CVE-2024-49997 – net: ethernet: lantiq_etop: fix memory disclosure
https://notcve.org/view.php?id=CVE-2024-49997
In the Linux kernel, the following vulnerability has been resolved: net: ethernet: lantiq_etop: fix memory disclosure When applying padding, the buffer is not zeroed, which results in memory disclosure. The mentioned data is observed on the wire. This patch uses skb_put_padto() to pad Ethernet frames properly. The mentioned function zeroes the expanded buffer. In case the packet cannot be padded it is silently dropped. Statistics are also not incremented. • https://git.kernel.org/stable/c/504d4721ee8e432af4b5f196a08af38bc4dac5fe https://git.kernel.org/stable/c/185df159843d30fb71f821e7ea4368c2a3bfcd36 https://git.kernel.org/stable/c/469856f76f4802c5d7e3d20e343185188de1e2db https://git.kernel.org/stable/c/2bf4c101d7c99483b8b15a0c8f881e3f399f7e18 https://git.kernel.org/stable/c/e66e38d07b31e177ca430758ed97fbc79f27d966 https://git.kernel.org/stable/c/1097bf16501ed5e35358d848b0a94ad2830b0f65 https://git.kernel.org/stable/c/431b122933b197820d319eb3987a67d04346ce9e https://git.kernel.org/stable/c/45c0de18ff2dc9af01236380404bbd6a4 •
CVSS: -EPSS: 0%CPEs: 4EXPL: 0CVE-2024-49996 – cifs: Fix buffer overflow when parsing NFS reparse points
https://notcve.org/view.php?id=CVE-2024-49996
In the Linux kernel, the following vulnerability has been resolved: cifs: Fix buffer overflow when parsing NFS reparse points ReparseDataLength is sum of the InodeType size and DataBuffer size. So to get DataBuffer size it is needed to subtract InodeType's size from ReparseDataLength. Function cifs_strndup_from_utf16() is currentlly accessing buf->DataBuffer at position after the end of the buffer because it does not subtract InodeType size from the length. Fix this problem and correctly subtract variable len. Member InodeType is present only when reparse buffer is large enough. Check for ReparseDataLength before accessing InodeType to prevent another invalid memory access. Major and minor rdev values are present also only when reparse buffer is large enough. Check for reparse buffer size before calling reparse_mkdev(). • https://git.kernel.org/stable/c/d5ecebc4900df7f6e8dff0717574668885110553 https://git.kernel.org/stable/c/c6db81c550cea0c73bd72ef55f579991e0e4ba07 https://git.kernel.org/stable/c/803b3a39cb096d8718c0aebc03fd19f11c7dc919 https://git.kernel.org/stable/c/c173d47b69f07cd7ca08efb4e458adbd4725d8e9 https://git.kernel.org/stable/c/e2a8910af01653c1c268984855629d71fb81f404 •
CVSS: -EPSS: 0%CPEs: 7EXPL: 0CVE-2024-49995 – tipc: guard against string buffer overrun
https://notcve.org/view.php?id=CVE-2024-49995
In the Linux kernel, the following vulnerability has been resolved: tipc: guard against string buffer overrun Smatch reports that copying media_name and if_name to name_parts may overwrite the destination. .../bearer.c:166 bearer_name_validate() error: strcpy() 'media_name' too large for 'name_parts->media_name' (32 vs 16) .../bearer.c:167 bearer_name_validate() error: strcpy() 'if_name' too large for 'name_parts->if_name' (1010102 vs 16) This does seem to be the case so guard against this possibility by using strscpy() and failing if truncation occurs. Introduced by commit b97bf3fd8f6a ("[TIPC] Initial merge") Compile tested only. • https://git.kernel.org/stable/c/e2b2558971e02ca33eb637a8350d68a48b3e8e46 https://git.kernel.org/stable/c/54dae0e9063ed23c9acf8d5ab9b18d3426a8ac18 https://git.kernel.org/stable/c/80c0be7bcf940ce9308311575c3aff8983c9b97a https://git.kernel.org/stable/c/12d26aa7fd3cbdbc5149b6e516563478d575026e https://git.kernel.org/stable/c/2ed7f42dfd3edb387034128ca5b0f639836d4ddd https://git.kernel.org/stable/c/a18c7b239d02aafb791ae2c45226f6bb40641792 https://git.kernel.org/stable/c/6555a2a9212be6983d2319d65276484f7c5f431a •
CVSS: -EPSS: 0%CPEs: 3EXPL: 0CVE-2024-49994 – block: fix integer overflow in BLKSECDISCARD
https://notcve.org/view.php?id=CVE-2024-49994
In the Linux kernel, the following vulnerability has been resolved: block: fix integer overflow in BLKSECDISCARD I independently rediscovered commit 22d24a544b0d49bbcbd61c8c0eaf77d3c9297155 block: fix overflow in blk_ioctl_discard() but for secure erase. Same problem: uint64_t r[2] = {512, 18446744073709551104ULL}; ioctl(fd, BLKSECDISCARD, r); will enter near infinite loop inside blkdev_issue_secure_erase(): a.out: attempt to access beyond end of device loop0: rw=5, sector=3399043073, nr_sectors = 1024 limit=2048 bio_check_eod: 3286214 callbacks suppressed • https://git.kernel.org/stable/c/0842ddd83939eb4db940b9af7d39e79722bc41aa https://git.kernel.org/stable/c/6c9915fa9410cbb9bd75ee283c03120046c56d3d https://git.kernel.org/stable/c/697ba0b6ec4ae04afb67d3911799b5e2043b4455 •