Description
In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_exthdr: fix register tracking for F_PRESENT flag nft_exthdr_init() passes user-controlled priv->len to nft_parse_register_store(), which marks that many bytes in the register bitmap as initialized. However, when NFT_EXTHDR_F_PRESENT is set, the eval paths write only 1 byte (nft_reg_store8) or 4 bytes (*dest = 0 on TCP/DCCP error path). When len > 4, registers beyond the first are never written, retaining uninitialized stack data from nft_regs. Bail out if userspace requests too much data when F_PRESENT is set.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
c078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 to < 8738b1b6d0e639ca1fc0f61516afd3557ac4ecc6affectedc078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 to < 19748967d59c31d24d21d40b728570788310b237affectedc078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 to < 46fc15a044e9938e7ea77786fb37edd2cd74f031affectedc078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 to < cd513e43b4b2bd1de39e2367bc4261c699a8652faffectedc078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 to < 67b27434c43b68a97becda98c9f0c8cf6cba2134affectedc078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 to < 78069a6d8bc86c9e036eb82c2af4a19cc1871a53affectedc078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 to < f08fb3d42fd3aad0b7a263da3ac3ebaf0845e265affectedc078ca3b0c5bf82c2b31906c446d6e2ad8ea0783 to < 772cecf198da732faebb5dcfc46d66a505be8495affected
Linux Linux
Default version status: affected
4.11affected0 to < 4.11unaffected5.10.259 to ≤ 5.10.*unaffected5.15.210 to ≤ 5.15.*unaffected6.1.176 to ≤ 6.1.*unaffected6.6.143 to ≤ 6.6.*unaffected6.12.94 to ≤ 6.12.*unaffected6.18.36 to ≤ 6.18.*unaffected7.0.13 to ≤ 7.0.*unaffected7.1 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/8738b1b6d0e639ca1fc0f61516afd3557ac4ecc6 ↗
- https://git.kernel.org/stable/c/19748967d59c31d24d21d40b728570788310b237 ↗
- https://git.kernel.org/stable/c/46fc15a044e9938e7ea77786fb37edd2cd74f031 ↗
- https://git.kernel.org/stable/c/cd513e43b4b2bd1de39e2367bc4261c699a8652f ↗
- https://git.kernel.org/stable/c/67b27434c43b68a97becda98c9f0c8cf6cba2134 ↗
- https://git.kernel.org/stable/c/78069a6d8bc86c9e036eb82c2af4a19cc1871a53 ↗
- https://git.kernel.org/stable/c/f08fb3d42fd3aad0b7a263da3ac3ebaf0845e265 ↗
- https://git.kernel.org/stable/c/772cecf198da732faebb5dcfc46d66a505be8495 ↗
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html ↗