CVE-2023-53599 (GCVE-0-2023-53599)

Vulnerability from cvelistv5 – Published: 2025-10-04 15:44 – Updated: 2026-05-11 19:48
VLAI
Title
crypto: af_alg - Fix missing initialisation affecting gcm-aes-s390
Summary
In the Linux kernel, the following vulnerability has been resolved: crypto: af_alg - Fix missing initialisation affecting gcm-aes-s390 Fix af_alg_alloc_areq() to initialise areq->first_rsgl.sgl.sgt.sgl to point to the scatterlist array in areq->first_rsgl.sgl.sgl. Without this, the gcm-aes-s390 driver will oops when it tries to do gcm_walk_start() on req->dst because req->dst is set to the value of areq->first_rsgl.sgl.sgl by _aead_recvmsg() calling aead_request_set_crypt(). The problem comes if an empty ciphertext is passed: the loop in af_alg_get_rsgl() just passes straight out and doesn't set areq->first_rsgl up. This isn't a problem on x86_64 using gcmaes_crypt_by_sg() because, as far as I can tell, that ignores req->dst and only uses req->src[*]. [*] Is this a bug in aesni-intel_glue.c? The s390x oops looks something like: Unable to handle kernel pointer dereference in virtual kernel address space Failing address: 0000000a00000000 TEID: 0000000a00000803 Fault in home space mode while using kernel ASCE. AS:00000000a43a0007 R3:0000000000000024 Oops: 003b ilc:2 [#1] SMP ... Call Trace: [<000003ff7fc3d47e>] gcm_walk_start+0x16/0x28 [aes_s390] [<00000000a2a342f2>] crypto_aead_decrypt+0x9a/0xb8 [<00000000a2a60888>] aead_recvmsg+0x478/0x698 [<00000000a2e519a0>] sock_recvmsg+0x70/0xb0 [<00000000a2e51a56>] sock_read_iter+0x76/0xa0 [<00000000a273e066>] vfs_read+0x26e/0x2a8 [<00000000a273e8c4>] ksys_read+0xbc/0x100 [<00000000a311d808>] __do_syscall+0x1d0/0x1f8 [<00000000a312ff30>] system_call+0x70/0x98 Last Breaking-Event-Address: [<000003ff7fc3e6b4>] gcm_aes_crypt+0x104/0xa68 [aes_s390]
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: c1abe6f570aff4b6d396dc551e60570d2f50bd79 , < 2c9d205040d7c0eaccc473917f9b0bb0a923e440 (git)
Affected: c1abe6f570aff4b6d396dc551e60570d2f50bd79 , < 6a4b8aa0a916b39a39175584c07222434fa6c6ef (git)
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Linux Linux Affected: 6.5
Unaffected: 0 , < 6.5 (semver)
Unaffected: 6.5.3 , ≤ 6.5.* (semver)
Unaffected: 6.6 , ≤ * (original_commit_for_fix)
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      "affected": [
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          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "crypto/af_alg.c"
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: af_alg - Fix missing initialisation affecting gcm-aes-s390\n\nFix af_alg_alloc_areq() to initialise areq-\u003efirst_rsgl.sgl.sgt.sgl to point\nto the scatterlist array in areq-\u003efirst_rsgl.sgl.sgl.\n\nWithout this, the gcm-aes-s390 driver will oops when it tries to do\ngcm_walk_start() on req-\u003edst because req-\u003edst is set to the value of\nareq-\u003efirst_rsgl.sgl.sgl by _aead_recvmsg() calling\naead_request_set_crypt().\n\nThe problem comes if an empty ciphertext is passed: the loop in\naf_alg_get_rsgl() just passes straight out and doesn\u0027t set areq-\u003efirst_rsgl\nup.\n\nThis isn\u0027t a problem on x86_64 using gcmaes_crypt_by_sg() because, as far\nas I can tell, that ignores req-\u003edst and only uses req-\u003esrc[*].\n\n[*] Is this a bug in aesni-intel_glue.c?\n\nThe s390x oops looks something like:\n\n Unable to handle kernel pointer dereference in virtual kernel address space\n Failing address: 0000000a00000000 TEID: 0000000a00000803\n Fault in home space mode while using kernel ASCE.\n AS:00000000a43a0007 R3:0000000000000024\n Oops: 003b ilc:2 [#1] SMP\n ...\n Call Trace:\n  [\u003c000003ff7fc3d47e\u003e] gcm_walk_start+0x16/0x28 [aes_s390]\n  [\u003c00000000a2a342f2\u003e] crypto_aead_decrypt+0x9a/0xb8\n  [\u003c00000000a2a60888\u003e] aead_recvmsg+0x478/0x698\n  [\u003c00000000a2e519a0\u003e] sock_recvmsg+0x70/0xb0\n  [\u003c00000000a2e51a56\u003e] sock_read_iter+0x76/0xa0\n  [\u003c00000000a273e066\u003e] vfs_read+0x26e/0x2a8\n  [\u003c00000000a273e8c4\u003e] ksys_read+0xbc/0x100\n  [\u003c00000000a311d808\u003e] __do_syscall+0x1d0/0x1f8\n  [\u003c00000000a312ff30\u003e] system_call+0x70/0x98\n Last Breaking-Event-Address:\n  [\u003c000003ff7fc3e6b4\u003e] gcm_aes_crypt+0x104/0xa68 [aes_s390]"
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          "url": "https://git.kernel.org/stable/c/6a4b8aa0a916b39a39175584c07222434fa6c6ef"
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    "dateReserved": "2025-10-04T15:40:38.479Z",
    "dateUpdated": "2026-05-11T19:48:16.675Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2023-53599\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-10-04T16:15:56.497\",\"lastModified\":\"2026-03-23T18:23:52.000\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncrypto: af_alg - Fix missing initialisation affecting gcm-aes-s390\\n\\nFix af_alg_alloc_areq() to initialise areq-\u003efirst_rsgl.sgl.sgt.sgl to point\\nto the scatterlist array in areq-\u003efirst_rsgl.sgl.sgl.\\n\\nWithout this, the gcm-aes-s390 driver will oops when it tries to do\\ngcm_walk_start() on req-\u003edst because req-\u003edst is set to the value of\\nareq-\u003efirst_rsgl.sgl.sgl by _aead_recvmsg() calling\\naead_request_set_crypt().\\n\\nThe problem comes if an empty ciphertext is passed: the loop in\\naf_alg_get_rsgl() just passes straight out and doesn\u0027t set areq-\u003efirst_rsgl\\nup.\\n\\nThis isn\u0027t a problem on x86_64 using gcmaes_crypt_by_sg() because, as far\\nas I can tell, that ignores req-\u003edst and only uses req-\u003esrc[*].\\n\\n[*] Is this a bug in aesni-intel_glue.c?\\n\\nThe s390x oops looks something like:\\n\\n Unable to handle kernel pointer dereference in virtual kernel address space\\n Failing address: 0000000a00000000 TEID: 0000000a00000803\\n Fault in home space mode while using kernel ASCE.\\n AS:00000000a43a0007 R3:0000000000000024\\n Oops: 003b ilc:2 [#1] SMP\\n ...\\n Call Trace:\\n  [\u003c000003ff7fc3d47e\u003e] gcm_walk_start+0x16/0x28 [aes_s390]\\n  [\u003c00000000a2a342f2\u003e] crypto_aead_decrypt+0x9a/0xb8\\n  [\u003c00000000a2a60888\u003e] aead_recvmsg+0x478/0x698\\n  [\u003c00000000a2e519a0\u003e] sock_recvmsg+0x70/0xb0\\n  [\u003c00000000a2e51a56\u003e] sock_read_iter+0x76/0xa0\\n  [\u003c00000000a273e066\u003e] vfs_read+0x26e/0x2a8\\n  [\u003c00000000a273e8c4\u003e] ksys_read+0xbc/0x100\\n  [\u003c00000000a311d808\u003e] __do_syscall+0x1d0/0x1f8\\n  [\u003c00000000a312ff30\u003e] system_call+0x70/0x98\\n Last Breaking-Event-Address:\\n  [\u003c000003ff7fc3e6b4\u003e] gcm_aes_crypt+0x104/0xa68 [aes_s390]\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-476\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.5\",\"versionEndExcluding\":\"6.5.3\",\"matchCriteriaId\":\"880C803A-BEAE-4DA0-8A59-AC023F7B4EE3\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/2c9d205040d7c0eaccc473917f9b0bb0a923e440\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/6a4b8aa0a916b39a39175584c07222434fa6c6ef\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
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}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.