{"id":"CVE-2026-72298","state":"PUBLISHED","title":"net: qrtr: fix 32-bit integer overflow in qrtr_endpoint_post()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qrtr: fix 32-bit integer overflow in qrtr_endpoint_post()\n\nqrtr_endpoint_post() validates an incoming packet with\n\n\tif (!size || len != ALIGN(size, 4) + hdrlen)\n\t\tgoto err;\n\nwhere size comes from the wire. On 32-bit, size_t is 32 bits and\nALIGN(size, 4) wraps to 0 for size >= 0xfffffffd, so the check\npasses and skb_put_data(skb, data + hdrlen, size) writes past the\nhdrlen-sized skb and oopses the kernel. 64-bit is unaffected.\n\nThis is the 32-bit residual of ad9d24c9429e2 (\"net: qrtr: fix OOB\nRead in qrtr_endpoint_post\"), which fixed only the 64-bit case.\n\nReject any size that cannot fit the buffer before the ALIGN.","publishedAt":"2026-08-15T05:55:18.529Z","updatedAt":"2026-10-16T18:55:15.699Z","severity":{"score":8.4,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"960b08dd36de1e341e3eb43d1c547513e338f4f8","status":"affected","lessThan":"3665e644ea081c4624a1637023b0de3b29f4ae04","versionType":"git"},{"version":"ad9d24c9429e2159d1e279dc3a83191ccb4daf1d","status":"affected","lessThan":"b609f7f46916c6b05585ca82455077198a23770f","versionType":"git"},{"version":"ad9d24c9429e2159d1e279dc3a83191ccb4daf1d","status":"affected","lessThan":"242408b5b763c01288adf3113cbce84378a76e1a","versionType":"git"},{"version":"ad9d24c9429e2159d1e279dc3a83191ccb4daf1d","status":"affected","lessThan":"d0597074e99731fdad5593e4f6d056a3866f2cab","versionType":"git"},{"version":"ad9d24c9429e2159d1e279dc3a83191ccb4daf1d","status":"affected","lessThan":"689b7267f8632b4661879dc323e26ebb60978afb","versionType":"git"},{"version":"ad9d24c9429e2159d1e279dc3a83191ccb4daf1d","status":"affected","lessThan":"22100a8f73d4ae4f17697dae93d4e2e1d283a6ec","versionType":"git"},{"version":"ad9d24c9429e2159d1e279dc3a83191ccb4daf1d","status":"affected","lessThan":"7f72c285f6d3bf63968a0344beee8ab1b370198b","versionType":"git"},{"version":"ad9d24c9429e2159d1e279dc3a83191ccb4daf1d","status":"affected","lessThan":"20054869770c7df060c5ecee3e8bbf9029c47191","versionType":"git"},{"version":"f8111c0d7ed42ede41a3d0d393b104de0730a8a6","status":"affected","versionType":"git"},{"version":"26b8d10703a9be45d6097946b2b4011f7dd2c56f","status":"affected","versionType":"git"},{"version":"19892ab9c9d838e2e5a7744d36e4bb8b7c3292fe","status":"affected","versionType":"git"},{"version":"5.10.46","status":"affected","lessThan":"5.10.261","versionType":"semver"},{"version":"4.19.196","status":"affected","lessThan":"4.20","versionType":"semver"},{"version":"5.4.128","status":"affected","lessThan":"5.5","versionType":"semver"},{"version":"5.12.13","status":"affected","lessThan":"5.13","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/qrtr/af_qrtr.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.13","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/qrtr/af_qrtr.c"]}],"references":["https://git.kernel.org/stable/c/3665e644ea081c4624a1637023b0de3b29f4ae04","https://git.kernel.org/stable/c/b609f7f46916c6b05585ca82455077198a23770f","https://git.kernel.org/stable/c/242408b5b763c01288adf3113cbce84378a76e1a","https://git.kernel.org/stable/c/d0597074e99731fdad5593e4f6d056a3866f2cab","https://git.kernel.org/stable/c/689b7267f8632b4661879dc323e26ebb60978afb","https://git.kernel.org/stable/c/22100a8f73d4ae4f17697dae93d4e2e1d283a6ec","https://git.kernel.org/stable/c/7f72c285f6d3bf63968a0344beee8ab1b370198b","https://git.kernel.org/stable/c/20054869770c7df060c5ecee3e8bbf9029c47191"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/72xxx/CVE-2026-72298.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-72298","state":"PUBLISHED","datePublished":"2026-08-15T05:55:18.529Z","dateUpdated":"2026-10-16T18:55:15.699Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-09T03:40:39.917Z"},"containers":{"cna":{"title":"net: qrtr: fix 32-bit integer overflow in qrtr_endpoint_post()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: qrtr: fix 32-bit integer overflow in qrtr_endpoint_post()\n\nqrtr_endpoint_post() validates an incoming packet with\n\n\tif (!size || len != ALIGN(size, 4) + hdrlen)\n\t\tgoto err;\n\nwhere size comes from the wire. On 32-bit, size_t is 32 bits and\nALIGN(size, 4) wraps to 0 for size >= 0xfffffffd, so the check\npasses and skb_put_data(skb, data + hdrlen, size) writes past the\nhdrlen-sized skb and oopses the kernel. 64-bit is unaffected.\n\nThis is the 32-bit residual of ad9d24c9429e2 (\"net: qrtr: fix OOB\nRead in qrtr_endpoint_post\"), which fixed only the 64-bit case.\n\nReject any size that cannot fit the buffer before the ALIGN."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"960b08dd36de1e341e3eb43d1c547513e338f4f8","status":"affected","lessThan":"3665e644ea081c4624a1637023b0de3b29f4ae04","versionType":"git"},{"version":"ad9d24c9429e2159d1e279dc3a83191ccb4daf1d","status":"affected","lessThan":"b609f7f46916c6b05585ca82455077198a23770f","versionType":"git"},{"version":"ad9d24c9429e2159d1e279dc3a83191ccb4daf1d","status":"affected","lessThan":"242408b5b763c01288adf3113cbce84378a76e1a","versionType":"git"},{"version":"ad9d24c9429e2159d1e279dc3a83191ccb4daf1d","status":"affected","lessThan":"d0597074e99731fdad5593e4f6d056a3866f2cab","versionType":"git"},{"version":"ad9d24c9429e2159d1e279dc3a83191ccb4daf1d","status":"affected","lessThan":"689b7267f8632b4661879dc323e26ebb60978afb","versionType":"git"},{"version":"ad9d24c9429e2159d1e279dc3a83191ccb4daf1d","status":"affected","lessThan":"22100a8f73d4ae4f17697dae93d4e2e1d283a6ec","versionType":"git"},{"version":"ad9d24c9429e2159d1e279dc3a83191ccb4daf1d","status":"affected","lessThan":"7f72c285f6d3bf63968a0344beee8ab1b370198b","versionType":"git"},{"version":"ad9d24c9429e2159d1e279dc3a83191ccb4daf1d","status":"affected","lessThan":"20054869770c7df060c5ecee3e8bbf9029c47191","versionType":"git"},{"version":"f8111c0d7ed42ede41a3d0d393b104de0730a8a6","status":"affected","versionType":"git"},{"version":"26b8d10703a9be45d6097946b2b4011f7dd2c56f","status":"affected","versionType":"git"},{"version":"19892ab9c9d838e2e5a7744d36e4bb8b7c3292fe","status":"affected","versionType":"git"},{"version":"5.10.46","status":"affected","lessThan":"5.10.261","versionType":"semver"},{"version":"4.19.196","status":"affected","lessThan":"4.20","versionType":"semver"},{"version":"5.4.128","status":"affected","lessThan":"5.5","versionType":"semver"},{"version":"5.12.13","status":"affected","lessThan":"5.13","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/qrtr/af_qrtr.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.13","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.13","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/qrtr/af_qrtr.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/3665e644ea081c4624a1637023b0de3b29f4ae04"},{"url":"https://git.kernel.org/stable/c/b609f7f46916c6b05585ca82455077198a23770f"},{"url":"https://git.kernel.org/stable/c/242408b5b763c01288adf3113cbce84378a76e1a"},{"url":"https://git.kernel.org/stable/c/d0597074e99731fdad5593e4f6d056a3866f2cab"},{"url":"https://git.kernel.org/stable/c/689b7267f8632b4661879dc323e26ebb60978afb"},{"url":"https://git.kernel.org/stable/c/22100a8f73d4ae4f17697dae93d4e2e1d283a6ec"},{"url":"https://git.kernel.org/stable/c/7f72c285f6d3bf63968a0344beee8ab1b370198b"},{"url":"https://git.kernel.org/stable/c/20054869770c7df060c5ecee3e8bbf9029c47191"}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":8.4,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - qrtr_endpoint_post() is only reachable via local injection paths—write()/io_submit to /dev/qrtr-tun or inbound SMD/MHI frames from the on-SoC modem/coprocessor; AF_QIPCRTR sendmsg never enters this function and QRTR is not an Internet-facing protocol.\nAC:L - The attacker fully controls the wire size field and total packet length; on 32-bit kernels, setting size>=0xfffffffd with len equal to the header length deterministically wraps ALIGN() to bypass validation without races or special victim state.\nPR:N - On Qualcomm deployments the primary path is QRTR_SMD/MHI, where the AP kernel accepts ipcrouter frames from the baseband without Linux credentials or QRTR authentication, so a malicious or compromised modem sender needs no AP privileges.\nUI:N - Exploitation requires delivering a single crafted QRTR packet to qrtr_endpoint_post(); no victim interaction such as mounting filesystems, opening files, or clicking prompts is needed.\nS:U - Impact is kernel heap corruption and denial of service on the application processor; it does not cross a VM/host boundary, IOMMU boundary, or other separate security authority.\nC:H - Bypassing validation causes skb_put_data() to memcpy() ~4GB from a hdrlen-sized input buffer, performing slab out-of-bounds reads of adjacent kernel heap memory that can disclose sensitive data.\nI:H - The same skb_put_data() call performs skb_put() with the wrapped size, writing far beyond the len-sized skb allocation and corrupting adjacent slab objects, enabling potential control-flow hijacking.\nA:H - The oversized skb_put_data() triggers skb_over_panic/kernel oops as documented in the fix commit, reliably crashing affected 32-bit kernels and causing denial of service."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T05:42:31.352Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.46","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.13","versionEndExcluding":"7.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.19.196"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.128"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12.13"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2026-72298","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"version":"2.0.3","timestamp":"2026-10-16T18:46:01.998827Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-16T18:55:15.699Z"}}]}}}